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ART002046748 | oai_dc | 서울지역 치과기공사의 동기부여 및 직무만족도 연구 | The study on dental technicians' motivation and job satisfaction in Seoul | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"심정석(경희대학교치과병원기공실); 이선경(경동대학교)"
] | Purpose : This study was the study verifying dental technicians' motivation and job satisfaction in Seoul through the positive method as well as its purposes were to investigated the effect of dental technician's manpower supply/demand prospect on motivation, job satisfaction and the effect of other job satisfaction factors on dental technician's motivation and job satisfaction.
Methods : For then, general characteristics of study objects were classified by sex, married/unmarried, age, career, salary, highest level of education, working place, position and job as well as job satisfaction factors were classified with future supply/demand prospect, future prospect, working hours, working environment and salary.
Results : We conducted a frequency analysis, crossing analysis and multi-linear regression analysis about the effect of the classified articles on motivation and job satisfaction. Also, for verifying the relationship of motivation and job satisfaction, we conducted correlation analysis and its result is as followed. First, it showed that the job related with making orthodontic appliance influenced on motivation, among the age, career and job of the general characteristics, and other jobs between working place and job influenced on job satisfaction. Second, the dark future prospect was showed to influence on motivation and job satisfaction highly so we could grasp that negative opinions are included in that. And low-paying was showed to highly influence on job satisfaction's fall so we could grasp the subjective low-salary standard at the present. But we expected that the manpower supply/demand prospect would influence on motivation and job satisfaction but there was little influence. Third, the correlation between motivation and job satisfaction was showed to be somewhat high, motivation had the standard which is above average and job satisfaction had the standard which is below the average. So with a little improving of job satisfaction, it's possible that motivation can be very high.
Conclusion : Therefore, in rapidly changing generation, we think that the dental technicians are actively coping with the reality of low-paying and high-working. But it's implying that anxiety for uncertain future was reflected. Furthermore, because institutional strategies for dental technicians' efficient management are insufficient in relation with policies so it's necessary the policy consideration for solve the job-unsatisfying factors actively. | 치의학 | null | kci_detailed_000199.xml | |||
ART002046738 | oai_dc | 도재용 금합금 재사용에 따른 변연 적합도에 대한 연구 | A study on the marginal fitness to reuse with a Au-Pt-Pd alloy for porcelain fused to metal crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"문희경(진주보건대학교)"
] | Purpose : This experimental study was to determine the fitness in each cervical margin of reusing porcelain gold alloy.
Methods : The gold alloy used in this experimental study was a Au-Pt-Pd alloy (BDCG-898, Bukwang Inc,Korea) for the fabrication of porcelain fused to metal crown. Twenty-five copings were divided into the five groups. And the group A, B, C, D and E were cording successively according to the frequency of reuse to five times. Each specimen was reused without adding new metal.
Results : The group A, B, C showed good fitness in each cervical margin. The group D got good fitness in labio and linguo cervical margin, but the mesio and disto cervical margin showed more than 40㎛.
Conclusion : The group E showed worse fitness than the other groups in each cervical margin. | 치의학 | null | kci_detailed_000199.xml | |||
ART002046753 | oai_dc | 의치사(Denture clinician) 교육과정 연구 | A Study of Curriculum of Denture clinician | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박명호(대구보건대학교); 배봉진(대구보건대학교); 이화식(대구보건대학교); 이희경(대구보건대학교)"
] | Purpose : The purpose of this study was to search denture clinician's services, American and European education system.
Methods : Basic curriculums of several countries in Europe and America were reviewed and researched curriculum.
Results : Considering denture clinician's services, American and European education system seems to be cost to our system.
Conclusion : We need suitable education for denture clinicians with basic curriculums of several countries in Europe and America. Therefore, in this study, basic curriculums of several countries in Europe and America were reviewed and curriculum that meets Korean situation was suggested. | 치의학 | null | kci_detailed_000199.xml | |||
ART002046751 | oai_dc | 수도권지역에서 노인의치 국민건강보험 급여에 관한 치과기공사의 인식조사 | Dental technician's perception investigation about national health insurance of old person's denture in metropolitan area | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이선경(경동대학교); 박용덕(경희대학교); 황경숙(신한대학교); 김영훈(원광보건대학교)"
] | Purpose : The purpose of this study is dental technician's perception investigation about national health insurance of old person's denture in metropolitan area.
Methods : A survey was performed on 103 subjects in metropolitan from January 14 to April 30 in 2009. The research tool was a structured questionnaire. The collected data was analyzed by frequency, descriptive and multiple linear regression.
Results : Total dental technician who respond to questionnaire was 103(100.0%). Male respondent appeared by 66.0%. 30-year-old low respondent appeared by 60.2% and subjects lived the most in seoul(68.0%). When got married, was expose that realization about national health insurance of old person's denture was high(p<0.05). When made denture, was expose that realization about national health insurance of old person's denture was high(p<0.05). Also, When got married, was expose that necessity about national health insurance of old person's denture was high(p<0.001).
Conclusion : When did national health insurance of old person's denture, there were a lot of problems. But, old people was need it. Therefore, I desire that this study is used to basic data of the national health insurance. | 치의학 | null | kci_detailed_000199.xml | |||
ART002046737 | oai_dc | Zirconia-Frit composites의 소결 및 물성에 미치는 MgO 첨가의 영향 | Effect of MgO Addition Affecting in Zirconia-Frit Composites' Sintering and Properties of Matter | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"권은자(혜전대학교); 이규선(동남보건대학교)"
] | Purpose : This study sought to apply different MgO additions to Zirconia (20wt % Frit) and thereby determine its mechanical properties depending upon variation of temperature, as a part of elementary study.
Methods : First, in terms of sintering density depending on sintering conditions, it was found that sintering density increased as temperature varied from 1100°C to 1300°C.
Results : As the addition of MgO increased, it was found that sintering density tended to decrease at each temperature. For the maximum sintering density obtained from pellet, it was found that 3wt% MgO addition specimens sintered at 1300°C had its maximum sintering density as high as 97.39%.
Conclusion : This study measured mechanical properties of these specimens, and it was found that their bending strength tended to decrease as the content of MgO addition increased. And it was found that their bending strength reached up to 162 MPa when 3wt% MgO was added to them for sintering process at 1300°C. It was also found that those specimens had Vickers microhardness up to 4.6 GPa when 5wt% MgO was added to them for sintering process at 1,300℃. | 치의학 | null | kci_detailed_000199.xml | |||
ART002150938 | oai_dc | 교합면의 해부학적 형태와 교합만곡의 연관성에 대한 연구 | Association between mandibular occlusal morphology and occlusal curvature | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"남신은(대구보건대학교 치기공과); 이희경(대구보건대학교)"
] | Purpose: This study aimed to generate 3-D occlusal curvatures and evaluate the relationship between the occlusal curvatures and mandibular occlusal morphology factors.
Methods: Mandibular dental casts from 25 young adult Korean were scanned as a virtual dental models with a 3-D scanner(Scanner S600, Zirkonzahn, Italy). The curve of Spee, curve of Wilson, and Monson’s sphere were generated by fitting a circle/sphere to the cusp tips using a least-squares method. The mandibular mesiodistal cusp inclination, buccolingual cusp inclination, and tooth wear parameters were measured on the prepared virtual models using RapidForm2004(INUS technology INC, Seoul, Korea). Wilcoxon signed-rank test was performed to test side difference, and Spearman’s rank correlation coefficients were investigated to verify the correlation between occlusal curvatures and correlated factors (a=0.05).
Results: The mean radii of curve of Spee were 83.09±33.94 in the left side and 79.00±28.12㎜ in the right side. The mean radii of curve of Wilson were 66.82±15.87㎜ in the mesial side and 47.87±9.40㎜ in the distal side with significantly difference between mesiodistal sides(p<0.001). The mean radius of Monson’s sphere was 121.85±47.11㎜. Most of the cusp inclination parameters showed negative correlation for the radius of Monson’ sphere(p<0.05). Especially, the buccolingual cusp inclinations in mesial side of molar showed high correlation coefficients among the factors(p<0.05).
Conclusion: The radius of Monson’s sphere was greater than the classical 4-inch values, and the buccolingual cusp inclinations in mesial side of molar can be considered as one of the main factors correlating with the radius of Monson’s sphere. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.217 | kci_detailed_000199.xml | ||
ART002150948 | oai_dc | 치기공과 학생들의 실전교육 전·후에 따른 객관적 지수와주관적 지수에 대한 연구 - 대구 소재 D대학의 치기공과 학생을 대상으로 - | Research on Dental Technology students’ objective and subjective indices before and after Practical training - D College in Daegu - | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김임선(대구보건대학교); 최병환(대구보건대학교); 김원기(대구보건대학교)"
] | Purpose: The purpose of this study aims to improve self-confidence, satisfaction and self fulfillment of dental technology students through practical skills competitions to meet the levels required by the industry.
Method: The questionnaire was composed of 12 general characteristics, 23 self-efficacy, 25 practice satisfaction, 5 self-satisfaction, 12 self fulfillment out of 77 questions. The reliability of the surveys showed Cronbach’α=0.893 on the self-efficacy, Cronbach’α=0.871 on the practice satisfaction, Cronbach’α=0.857 on self-satisfaction and Cronbach’α=0.941 on self fulfillment.
Results: Before and after the test result comparison showed a statistically significant difference for both men and women according to the general characteristics. Women’s progress was higher than for men. The thought about dental technicians has changed for the better and showed a statistically significant difference. Subjects who have 3.1~3.5 school record showed the highest score on job skills, self-efficacy, practice satisfaction, self-satisfaction and self fulfillment according to the the general characteristics, and 3.6 ~ 4.0, 3.0 or less and 4.1 ~ 4.5 in order.
Conclusion: This study was conducted with dental technology students who participated in practical skills competitions after 10 week 40 hours training in D college, and the results were as follows. Practical training improved the job performance, self-efficacy, practice satisfaction, self-satisfaction and self fulfillment improved significantly. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.225 | kci_detailed_000199.xml | ||
ART002150931 | oai_dc | 치과기공사의 물질안전보건자료에 대한 인식 - 경기도 치과기공사를 중심으로 - | Recognition of the Material Safety Data Sheet of dental technicians - Focused on Gyeonggi - do Dental Technicians - | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"안형준(신구대학교 치기공과); 배은정(고려대학교); 태원배(신구대학교 치기공과); 오현(신구대학교 치기공과); 송민재(신구대학교 치기공과); 박철훈(신구대학교 치기공과)"
] | Purpose: The purpose of this study is to discover the recognition of dental technicians on MSDS and to research the furnishing rate of Material Safety Data Sheet (MSDS) in dental laboratories.
Method: 104 dental technicians who were self-written questionnaire. The results were analyzed by SPSS 12.0. The answers to the questionnaire underwent frequency analysis, chi-square test were performed.
Results: The result of cross analysis on the occurrence of occupational diseases according to whether MSDS is furnished showed that the group with MSDS furnished had 37.8% of damages due to their occupation, but the group with MSDS unfurnished had 65.7% of damages due to their occupation, which displayed a significant difference(p<0.05). The result of cross analysis on whether the education about chemicals according to whether MSDS is furnished showed there were relatively more responses of no education on the types and characteristics of chemicals, the effect on human body and its risk, emergency measure when exposed to risk, the treating and storing methods and the disposal methods. In addition, there were significant differences on whether all the above education was done between the group with MSDS furnished and the group without MSDS(p<0.000).
Conclusion: In order to secure safe working environment of dental technicians and to reduce occurrence of damage caused by chemicals, the related education is necessary. The recognition of dental technicians on MSDS and furnishing rate is increasing but still insufficient, so the related organizations need to establish education and PR measures for prevention of damage. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.209 | kci_detailed_000199.xml | ||
ART002150834 | oai_dc | 하중 위치에 따른 시멘트 유지형 임플란트 지지골의 유한요소법 응력 분석 | Finite element analysis of stress distribution on supporting bone of cement retained implant by loading location | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김갑진(부산가톨릭대학교)"
] | Purpose: The purpose of this study is to evaluate the effect of two different oblique mechanical loading to occlusal surfaces of cement retained implant on the stress distributions in surrounding bone, using 3-dimensional finite element method.
Methods: A 3-dimensional finite element model of a cement retained implant composed of three unit implants, simplified ceramic crown and supporting bone was developed according to the design of ement retained implant for this study. two kinds of surface distributed oblique loads(100 N) are applied to following occlusal surfaces in the single crowns; 1) oblique load on 2 occlusal points(50N for each buccal cusp, 2 buccal cusps exist), 2) oblique load on 4 occlusal points(25N for each buccal and lingual cusp, 2 buccal and 2 lingual cusps exist) Results: The results of the comparison of the stress distributions on surrounding bone are as follows. In the condition of oblique load on 2 occlusal points, VMS was 741.3 Mpa in the M1(Ø4.0×13㎜) model and 251.2 Mpa in the M2(Ø5.0×13㎜) model. It means the stress on the supporting bone is decreased. The results of oblique load on 4 occlusal points are similar to this one.
Conclusion: Increasing the diameter of the implant fixture is helpful to distribute the stress on the supporting bone. Also, to obtain the structural stability of the supporting bone, it is effective to distribute the load evenly on the occlusal surface of crown in producing single crown implant. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.143 | kci_detailed_000199.xml | ||
ART002150918 | oai_dc | 중형견 치과보철물 제작을 위한 교합관계 관찰 | Observation of Occlusal Relations for Production to Dental Prosthetics of Dogs | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박유진(부산가톨릭대학교); 최성민(부산가톨릭대학교)"
] | Purpose: This study introduces the production process of dog’s dental prosthesis using an automated dental prosthetics technology. The occlusal interaction of dog’s dental prosthesis was observed.
Methods: This study was proceeded with dog’s the mandibular first molar teeth. The 3D CAD designed to 3D model specimens was observed by CAD software. and The specimens designed to 3D model specimens was observed occlusal interaction by using articulator.
Results: Occlusal contact point in prosthetic specimens were observed in buccal surface. and 98% of the size of the crown is the best occlusal relationship.
Conclusion: Observation of occlusal relations result to 98% of the size of the crown is the best. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.203 | kci_detailed_000199.xml | ||
ART002150824 | oai_dc | 지대주 경사각이 지르코니아 전부도재관의 변연적합도에 미치는 영향 | The Effect of Abutment Inclined Angle on the Marginal Fit of Zirconia All - ceramic Crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이서연(부산가톨릭대학교); 전병욱(부산가톨릭대학교); 정인성(부산가톨릭대학교)"
] | Purpose: The present study was performed to investigate the effect of abutment inclined angle on the marginal fit of zirconia all-ceramic crown.
Methods: The Ti abutments with 3 different inclined angle(2°, 4° and 6°) were fabricated. The zirconia copings were fabricated for each abutment by using dental CAD/CAM system. The manufactured zirconia copings were duplicated through silicone replica technique, and a replicated specimen was sectioned in the center of buccolingual and mesio-distal axial to measure the marginal fit by using a stereo microscope. The results were analyzed using a one-way ANOVA with SPSS 22.0 for Windows(α=0.05).
Results: On the bucco-lingual axial, marginal fit was the RL3(41.5±3.4㎛), RL2(44.3±4.3㎛) and RL1(47.5±5.7㎛), respectively. On the mesio-distal axial, marginal fit was the RL3(41.1±3.7㎛), RL2(45.7±5.3㎛) and RL1(46.2±4.5㎛), respectively. One-way ANOVA showed statistically significant difference between groups for marginal fit(p<0.05).
Conclusion: For marginal fit of the abutments inclined angle, RL3 specimen was superior. The abutment inclined angle had influence on marginal fit of the zirconia copings. The marginal fit of each group were within clinically acceptable range. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.111 | kci_detailed_000199.xml | ||
ART002150912 | oai_dc | 지르코니아 투명도 및 두께에 따른 레진 시멘트의 중합률 | The degree of conversion of dual - cured resin cement as a function of transmittance and thickness | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"노형록(광주보건대학교); 선금주(광주보건대학교); 주규지(광주보건대학교)"
] | Purpose: The purpose of this study was to know of photopolymerization effect of self-etch dual-cured resin cement on different transmittance and thickness of zirconia disks.
Methods: The two types of transparent and opaque zirconia speciments were prepared. The five speciments of each groups were seperated with 0.5㎜ and 1.0mm thickness. Degree of conversion(DC) were studied by FT-IR spectroscopy using ATR method before and after irradidaion for 40 sec.
Results: The relative DC was showed the higher results of ZS5 as compared with ZS10 (p < 0.05). And OP5 and OP10 were lower results than ZS10 (p < 0.05).
Conclusion: The photopolymerization effect of dual-cured resin cement were affected by the transmittance and thickness of zirconia. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.193 | kci_detailed_000199.xml | ||
ART002150897 | oai_dc | 치과용 Co-Cr 금속도재관의 표면처리에 의한 도재와의 결합 강도 분석 | Analysis of the bonding strength according to surface treatments of dental Co-Cr alloy for porcelain fused to metal | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박희근(진주보건대학교); 박원욱(진주보건대학교); 조경명(경상대학교 나노신소재공학부); 황규홍(경상대학교)"
] | Purpose: Observation of Oxide Film Formation and Bonding Strength according to surface treatment of Co-Cr Alloy for porcelain fused to Metal.
Methods: metal specimens 0.5㎜×25㎜×4㎜ in size were made using Co-Cr alloys for porcelain fused to metal crown (Heraenium P, Tae jung Medis). Dental porcelain 0.5㎜×25㎜×4㎜ in size was sintered on the metal specimens after changing the etching time, sandblasting condition, and heat treatment temperature. Subsequently, the bonding strength was compared by the three-point flexural strength test using a universal testing machine (UTM) to observe the fracture surface and oxidized layers.
Results: With regard to the experimental group treated with acid-etching, Specimen 1 treated for 25 minutes (B-3) showed the highest bonding strength, and Specimen 2 treated only with sandblasting showed the most excellent bonding force at 3.5 bar (C-3). With regard to the experimental group treated with sandblasting at 3.5 bar after acid-etching for 25 minutes, Specimen 3 with heat treatment at 980℃ (D-3) showed the highest bonding strength.
Conclusion: The specimen which went through both sandblasting and etching, showed an excellent ceramicmetal bond strength. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.175 | kci_detailed_000199.xml | ||
ART002150890 | oai_dc | 치과 CAD-CAM용 임시 수복재의 색 안정성 비교 연구 | Comparative Study on the Color Stability of Temporary Prosthetic Materials for Dental CAD-CAM | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이혜은(경동대학교); 김원수(대전보건대학교); 김정숙(대전보건대학교); 이주희(대전보건대학교); 원석재(대전보건대학교 치기공과)"
] | Purpose: This study was conducted to examine the color stability of temporary prosthetic materials for dental CADCAM.
Method: 2 kinds of existing acrylic resin temporary filling materials and 2 kinds of polymer prosthetic materials for dental CAD-CAM were used for testing, and five specimens respectively were absorbed in soy sauce, red pepper paste, and coffee. A Chroma Meter was used as analysis equipment. The color change of the specimens was observed to calculate ΔE value throughout 2 days, 3 days, 4 days, and 5 days and this was analyzed and the following result was obtained.
Results: Snap’s ΔE value was bigger than Vipi block(p<0.05). Red pepper paste had the largest impact on the color change of resin(ΔE), followed by soy sauce and coffee(p<0.000). With the passage of time, ΔE value was inversely(-) related and decreased somewhat(p<0.000). | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.165 | kci_detailed_000199.xml | ||
ART002150971 | oai_dc | 치기공과 학생의 취업스트레스와 진로결정 자기효능감의 연관성 | A Study on the Relationship Between Job Seeking Stress and career decision - making self - efficacy in students of Department of Dental Technology | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강월(고려대학교); 김지환(고려대학교); 김웅철(고려대학교)"
] | Purpose: This study is to analyse the job seeking stress, to see the relationship Between Job Seeking Stress and career decision-making self-efficacy in students of department of dental technology.
Method: For this, the students of department of dental technology in daegu and daejeon and wonkwang university selected at May 2016. A question investigation was used in a entry method of self-estimation. Furthermore a total of 151 person was used as final analysis data. Statical analysis was performed with SPSS 22.0. An analysis of frequency, two sample t-test, one-way ANOVA, Multiple regression was used.
Results: Firstly, personal expenses affected beneficially statistically the Job Seeking Stress(p<.05). Secondly, sex, Score, Major satisfaction, personal expenses affected beneficially statistically the career decision-making selfefficacy(p<.05). Thirdly, University environment and academic stress in the Job Seeking Stress affected beneficially statistically the career decision-making self-efficacy(choice target).
Conclusion: The study found out that there was significant effect when increased to university environment and academic stress in Job Seeking Stress, the career decision-making self-efficacy was decreased. So the study proved that when helping students facing difficulties due to the career decision-making self-efficacy, it is important to decreased their university environment and academic stress. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.247 | kci_detailed_000199.xml | ||
ART002150833 | oai_dc | 지르코니아 프라이머 종류에 따른 복합레진 - 지르코니아의 전단결합강도 | Effec of different zirconia primers on shear bond strengths of composite resin to bonded zirconia | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"석홍병(전북대학교 치과대학 치과재료학교실); 이정환(광주보건대학교); 김태석(마산대학교); 안재석(광주보건대학교)"
] | Purpose: The aim of this research was to evaluate the influence of different surface treatments on the shear bond strength of zirconia ceramic to composite resin.
Methods: Seventy two cylinder-shape (diameter: 5 mm; height: 12 mm) blocks of experimental industrially manufactured Y-TZP ceramic were abraded with 125㎛ Al2O3 particles and randomly divided into 4 groups. All the materials were categorized as group Gc(control group - composite resin veneering on zirconia surface), Gr -composite resin veneering after surface treatment of Rocatec system (3M ESPE, Seefeld, Germany) group; Gz -composite resin veneering after surface treatment of Zirconia primer (Z-primer, Bisco, U.S.A) group; Gm -composite resin veneering after surface treatment of zirconia primer (Monobond plus, ivoclar vivadent AG, Liechtenstein) group. Two different zirconia primers and Rocatec system were used to zirconia cylinders (n=16) onto the zirconia surface. Zirconia specimens, polished and roughened, were pretreated and composite bilayer cylinders bonded using conventional adhesive techniques.
Results: Shear bond strengths were analyzed using single-factor ANOVA(p<0.05). Bond strength values achieved after airbone particle abrasion and zirconia surface pre-treatments(p<0.05).
Conclusion: Shear bond strength tests denmonstrated that zirconia primer is a viable method to improved bond strength between zirconia ceramic core and veneering composites. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.135 | kci_detailed_000199.xml | ||
ART002150836 | oai_dc | 유한요소법을 이용한 치과 임플란트 고정체의 직경과 길이에 따른 지지골의 응력 분석 | Finite element analysis on the stress of supporting bone by diameters and lengths of dental implant fixture | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이명곤(부산가톨릭대학교)"
] | Purpose: The dental implant should be enough to endure chewing load and it’s required to have efficient design and use of implant to disperse the stress into bones properly. This study was to evaluate the stress distribution on a supporting bone by lengths and diameters of the implant fixture.
Methods: The modeling and analysis of stress distribution was used for the simple molar porcelain crown model by Solidworks as FEM program. It was designed on applying with tightening torque of 20 Ncm of a abutment screw between a cement retained crown abutment and a fixture. The fixtures of experimental model used 10, 13㎜ by length and 4, 5㎜ by diameter. A external vertical loading on the two buccal cusps of crown and performed finite element analysis by 100 N.
Results: The maximum von Mises stress(VMS) of all supporting bone models by fixture length and diameter were concentrated on the upper side of supporting compact bone. The maximum stress of each model under vertical load were 164.9 ㎫ of M410 model, and 141.2 ㎫ of M413 model, 54.3 ㎫ of M510 model, 53.6 ㎫ of M513 model.
Conclusion: The stress reduction was increase of fixture’s diameter than it’s length. So it’s effective to use the wider fixture as possible to the conditions of supporting bone. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.151 | kci_detailed_000199.xml | ||
ART002150907 | oai_dc | 치과용 3D 프린팅 시스템에 의해 출력된 보철물의 품질 평가 | An evaluation of quality of dental prostheses printed by dental 3 - dimensional printing system | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"한만소(대전보건대학교)"
] | Purpose: The purpose of this study were to evaluate the quality of dental prostheses printed by 3-dimensional printing system.
Methods: Mater model was prepared and ten study models were fabricated. Ten single crowns were printed by 3D-printing system(Resin group) and another ten single crowns using casting method were manufactured(Metal group). The marginal adaptation of single crowns were measured using by silicone replica technique. Silicone replicas were sectioned four times. The marginal adaptations were evaluated using by digital microscope. Statistical analyses were performed with Mann-Whitney test(α=0.05).
Results: Mean ± standard deviations of all marginal adaptations were 92.1(20.0)㎛ for Metal group and 69.7(12.3)㎛ for Resin group. Two groups were no statistically significant differences(p>0.05).
Conclusion: Marginal adaptation of single crowns printed by 3D-printing system were ranged within the clinical recommendation. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.185 | kci_detailed_000199.xml | ||
ART002150963 | oai_dc | 치기공학과 학생들의 블렌디드 러닝 흥미도와 만족도 간의 연관성 | A Study on the Relationship Between Blended Learning Interesting and Satisfaction on Students majoring in Dental Technology | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강월(고려대학교); 김지환(고려대학교); 박연경(김천대학교); 한만소(대전보건대학교); 김웅철(고려대학교)"
] | Purpose: The purpose of this study is to investigate the analysis blended learning interesting and satisfaction on students majoring in dental techniques.
Method: The study subject were 181 students from Gimcheon university. Data for this survey was obtain by selfadministration method. This questionnaire consist of lecture°Øs interesting and satisfaction when using an blended learning in the lecture. SPSS 22.0 was used. Analysis of frequency was used and two sammple t-test was used to identify significantly different blended interesting and sataisfaction within the grade. Multiple regression was used to which interestings affect the satisfaction.
Results: First, there were significant differences in the grade among the blended interesting and sataisfaction, while on differences in participation satisfaction(p<0.05). Second, The correlation coefficient is 0.714 between blended interesting and staisfaction, Third, Multiple regression showed that the lecture°Øs interesting applying blended learning affects the satisfaction(p<0.05).
Conclusion: Given the findings of the study, lecture applying blended learning seem to be efficient education programs to improve lecture's interesting & satisfaction. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.237 | kci_detailed_000199.xml | ||
ART002150874 | oai_dc | 지르코니아의 소결 후 특성 | Surface Characteristics of Ground and Post - Sintered Zirconia | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김민정(경북대학교); 김임선(대구보건대학교); 최병환(대구보건대학교); 김원기(대구보건대학교)"
] | Purpose: It is to compare and evaluate the change of the wear rate and phase variation of the Zirconia before and after the sintering after the grinding by a high speed equipment manufactured for the Zirconia.
Methods: The specimen of the sintered Zirconia was manufactured as size of 15㎜×15㎜×2㎜. The grinding has been applied to each of all pieces of each test groups for a minute fit for each condition at same speed of 50,000 rpm by a diamond bur at high speed handpiece with injection of the air and water. For the observation of the surface before and after the sintering of the each test piece, the cross section of it was observed as 100 magnification by a scanning electron microscope after it was coated by PT, and the diffraction analysis was performed by XDR to compare the crystal phase of the Zirconia. The average surface roughness value of all specimens were evaluated. The wear test was performed at room temperature by applying a load of 1kg for 120,000 cycles for the chewing period 6 months. Wear was analyzed for the enamel cusps by measurement of the vertical substance loss with a laser scanner.
Conclusion: The phase variation from the tetragonal phase to the monoclinic phase was confirmed in the test group of the pre-sintered Zirconia after the grinding, and the value of the surface roughness and the wear rate was increased in experimental group. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.157 | kci_detailed_000199.xml | ||
ART002150828 | oai_dc | CERECⓇ system에서 사용하는 세라믹 소재로 가공된 CAD/CAM 전부도재관의 변연간격 비교분석 | Comparison of marginal gap of monolithic CAD/CAM - generated crowns according to the ceramic materials for CERECⓇ system | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김재홍(경동대학교); 김사학(경동대학교); 김기백(고려대학교)"
] | Purpose: The purpose of this study is to evaluate the marginal gap of all-ceramic crowns fabricated by CERECⓇ in-office CAD/CAM system.
Methods: The mandibular first molar was selected as the abutment for the experiments. Thirty working models were prepared. VITA Mark Ⅱ(VM) and VITA Enamic(VE), LAVA Ultimate(LU) blocks were milled using CEREC MCXL with CEREC 3D system to construct 10 crowns for each groups. To measure marginal gap, milled restorations were examined under digital microscope with scale under 160x magnifications. The results were statistically analyzed using the one-way ANOVA and Tukey’s HSD test(α=0.05).
Results: There was no significant difference in the marginal gap regarding to ceramic materials(p>0.05).
Conclusion: Single crowns fabricated using CEREC in-office CAD/CAM system provided clinically acceptable marginal gap. This confirmed that the type of ceramic material used does not determine the precision of fit of a prosthesis. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.119 | kci_detailed_000199.xml | ||
ART002150831 | oai_dc | 치과용 Co-Cr sinter metal의 소결 후 변형비교 | Observation of Shape after sinter of Dental Co-Cr sinter metal | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"송준부(부산가톨릭대학교 치기공학과); 김갑진(부산가톨릭대학교)"
] | Purpose: Currently advanced in Dental CAD/CAM technology increase a use of Co-Cr sinter metal block at Dental CAD/CAM part traditionally it has been being used with metal casting method. There is an advantage that can leave out a step of investment and casting as well as reducing a working time to compare with conventional casting method in a dry milling.
Methods: In this research, compare a deformation of before and after sinter result of Co-Cr sinter metal block. Design a specimen figure by 3D CAD software and transformed it to a STL file can be used at Dental CAD/CAM. With a transformed STL file, milled a Co-Cr sinter metal specimen by using a Dental CAD/CAM dry milling machine. It arrived at the following conclusions after measuring an outer form and thickness of a machined specimen and then after sinter measure it again in a way of before sinter measurement method.
Results: It is confirmed that there is no error while a 3D design figure specimen is transformed to a Dental CAD data. It is observed that there is no error at Co-Cr sinter metal specimen which consider a length of single coping and bridge.
Conclusion: It is observed that there is no deformation at a specimen of AS05 and AB05 are made of 0,5mm thickness. On the other hand, the out of range of deformation is observed at a specimen of AS10 and AB10 which are made of 1mm thickness. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.3.127 | kci_detailed_000199.xml | ||
ART002014339 | oai_dc | 구강 내 스캐닝 방법에 의해 제작된 폴리우레탄 모형의 정확도 평가 | Evaluation of validity of polyurethane model fabricated by intra-oral scanning method | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김원태(대전보건대학교); 이병기(대전보건대학교); 현종구(대전보건대학교); 김기백(대전보건대학교 치기공과)"
] | Purpose: The purpose of this study was evaluate the validity of polyurethane model fabricated by intra oral scanning method.
Methods: Ten sam cases of stone models were manufactured from master model, and polyurethane models were made with the intra oral scanning and CNC milling method. One examiner individually measured 6 distances(intercanine distance, intermolar distance, two dental arch lengths(right, left) and two diagonal of dental arch lengths(right, left) on the stone models and the polyurethane models. The Mann-Whitney U test( =0.05) were used for statistical analysis.
Results: The mean difference between measurements made directly on the stone models and those made on the polyurethane models was 0.31-0.38 . No statistically differences between the two groups were founded 4 distances(p>0.05), but 2 distances were statistically significant(p<0.05).
Conclusion: Stone models showed larger than polyurethane models fabricated by intra oral scanning method. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.2.91 | kci_detailed_000199.xml | ||
ART002014337 | oai_dc | 도재 전용액이 지르코니아 코어-도재 비니어의 전단결합강도에 미치는 영향 | Effect of modeling liquid on the shear-bond strength of zirconia core - porcelain veneer | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최병환(대구보건대학교); 김임선(대구보건대학교)"
] | Purpose: This study is to evaluate the effect of modeling liquid on the shear-bond strength between zirconia core and veneering ceramic.
Methods: Disk-shaped (diameter: 12.0 ; height: 3.0 ) zirconia were randomly divided into six groups according to the surface conditioning method and whether modeling liquid is used or not to be applied (N=60, n=10 per group): group 1 - control group with distilled water(ZD); group 2 - control group with modeling liquid(ZM); group 3 - airborne particle abrasion with 110- Al2O3(AD)with distilled water; group 4 - airborne particle abrasion with 110- Al2O3 with modeling liquid(AM); group 5 - liner with distilled water(LD); group 6£≠liner with modeling liquid(LM). Contact angles were determined by the sessile drop method at room temperature using a contact angle measurement apparatus. The specimens were prepared using dentin veneering ceramics, veneered, 3 high and 2.8 in diameter, over the cores. The shear bond strength test was performed in a Shear bond test machine. Load was applied at a cross-head speed of 0.50 /min until failure. The fractured zirconia surfaces were evaluated by using stereomicroscope ( 30). Collected data were analyzed using SPSS(Statistical Package for Social Sciences) Win 12.0 statistics program.
Results: ZD showed the highest contact angle(50.6 5.4 ) and LD showed the lowest value(6.7 1.3 ). Control groups and zirconia liner groups were significantly higher contact angle than liner groups(p<0.05). LD was the highest shear bond strength(43.9 3.8 ) and ZD was the lowest shear bond strength(24.8 4.9 ). Shear bond strengths of control groups and contact angle of liner groups were not significantly different((p>0.05). Liner groups presented adhesive failures. The others groups showed cohesive and adhesive failures.
Conclusion: Modeling liquid groups showed lower contact angles and lower shear bond strength compared to those of distilled water groups. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.2.83 | kci_detailed_000199.xml | ||
ART002014340 | oai_dc | 치과기공사의 직무만족도와 사회적 지원에 관한 조사 | A Study on the Relationship of Job Satisfaction and Social Support of Dental Technicians | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"권은자(혜전대학교); 한민수(혜전대학교); 최에스더(혜전대학교)"
] | Purpose: This study was carried out in order to examine the relationship of job satisfaction and social support on the dental technicians and to analyze its influence.
Methods: A self-reported questionnaire survey was carried out by having convenience sampling as 220 dental technicians who work in Seoul Metropolis, Gyeonggi-do Province, Daejeon and Chungnam Province.
A research tool was used questionnaire that was proved reliability and validity. It was prepared with totally 37 questions such as 12 items for subjects’ general characteristics, 18 items for job satisfaction measurement, and 7 items for social support measurement. An analysis of the collected data was computationally processed by using SPSS Win 17.0 program. An analytical technique was made by using statistical techniques such as frequency & percentage, T-test or One-way ANOVA analysis. The following are the analytical results of the collected materials.
Results: As a result of analyzing research subjects’ job satisfaction level, there was significant difference(P<0.05) in items of religion, hobby life, working environment, and rest time out of daily work. The whole mean in job satisfaction was indicated to be relatively high with 3.13. However, job satisfaction with social recognition, salary, and safety was indicated lowly. As a result of analyzing research subjects’ social support level, there was significant difference(P<0.05) in items of age, working environment, and rest time out of daily work. The whole mean in social support was indicated to be relatively high with 3.49. As a result of analyzing correlation between job satisfaction and social support, all variables were indicated to be positive correlation in high significance level, thereby having been indicated that the higher job satisfaction leads to the higher social support.
Conclusion: As a result of this study, there is high correlation between social support and job satisfaction. An effort and a support are considered to be necessary for forming positive personal relations among members such as relationship with family member and with fellow employee, for improving the working conditions, and for enhancing dental technicians’ pride and social recognition in order to promote dental technician’s job satisfaction. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.2.99 | kci_detailed_000199.xml | ||
ART002014342 | oai_dc | 치과기공사의 소음 스트레스 | Stress of Noise on Dental Technician | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이주희(대전보건대학교)"
] | Purpose: Production of dental prosthesis by a dental technician causes a loud noise. Thus, we investigated stress of dental technicians due to a noise using a structured questionnaire.
Methods: A survey was conducted on working dental technicians across the country from July 2013 to November 2013; among 200 sets of survey distributed, 166 were completed and returned, and excluding the 11 that deemed unsuitable, 155 sets were used for statistics. The program SPSS 19.0 was used to analyze the correlation among the collected data.
Results: The stress of noise was found to be 2.83/5 points (2.93/5 for physical stress, 2.72/5 for emotional stress).
Recognition of noise was found to be 2.71/5 points (3.39/5 for recognition of noise, 2.64/5 for accidents caused by noise, 2.29/5 for experiencing disability due to noise). For general items, the highest stress were shown for the following catogories: by gender, females (p=.008); by position, chief engineer (p=.033); by monthly pay, 2.51M-3.0M KRW (p=.023); by interior comfort, ‘very unpleasant’ was the highest recognized (p=.014). For the effect of time exposed to noise, its stress (p=.000) and recognition (p=.000) rose with increase of time.
Conclusion: Dental technicians performs tasks in work environments exposed to extreme noise. This research attempts to re-emphasize the necessity for improving the work environment for noise and provide measures of blocking noise and precaution. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.2.111 | kci_detailed_000199.xml | ||
ART002014336 | oai_dc | 다른 스캐닝 방법으로 제작된 리튬 디실리케이트 단관의 변연 및 내면 적합도 평가 | Evaluation of the marginal and internal fit of lithium disilicate crowns fabricated by different scanning methods | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김재홍(고려대학교); 김웅철(고려대학교); 김지환(고려대학교)"
] | Purpose: This study was to compare adaptations of lithium disilicate CAD/CAM crowns fabricated with different scanning systems.
Methods: This study selected the mandibular right first molar as an abutment for experiments and produced 10 working models. Lithium disilicate crowns appropriate for each abutment were produced by using a CEREC CAD/CAM system. The independent t-test was then used to compare and analyze the data obtained from the two groups( =0.05).
Results: Mean(SD) adaptation were 86.93(22.82) for the InS group, 88.42(26.77) for the ExS group. They were no statistically significant differences between groups for adaptation(p>0.05).
Conclusion: Within the limitations of this study, the results suggest that the accuracy of all investigated optical scanner were satisfactory for clinical use. Further assessment and improvement of the lithium disilicate ceramic for the fabrication of FPDs is evidently still required. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.2.75 | kci_detailed_000199.xml | ||
ART002014343 | oai_dc | 치과 의료 인력과 치과기공사의 업무협력에 대한 인식 - 치과기공사 중심으로 - | Perception of Dental Personnel and Dental Technicians on Interprofessional Collaboration -Focus on Dental Technicians | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김정숙(대전보건대학교); 이혜은(경동대학교)"
] | Purpose: This study has been carried out to help to enhance the measures of interprofessional collaboration between Dental personnel and dental technicians, and between dental technicians themselves through the analysis of recognition of interprofessional collaboration between dental technicians.
Methods: The subjects in this study were 130 dental technicians who were self-written questionnaire. The results were analyzed by SPSS 12.0. The collected data was analyzed by frequency and Correlation.
Results: As a result of examining the correlation analysis of each question to explore the factors that affect interprofessional collaboration recognition of dental technicians, the group which received criticism from dental personnel showed negative (-) correlation in the interprofessional collaboration recognition (p <0.05). The following groups showed positive (+) correlations in the recognition of interprofessional collaboration : the group who replied that they can utilize information on the patients associated with the prosthesis production (p <0.01); the group who thinks that they are sharing common goals (P <0.01); and the group who replied that Dental personnel are familiar with patients (p <0.01). The following groups also showed higher positive (+) correlations in the recognition of interprofessional collaboration : the group who replied that they frequently discuss patient’s information with Dental personnel (p <0.01); the group who thinks they have mutual confidence in one another (p<0.01); the group who thinks that cooperation among their colleagues in dental technique laboratories are being done well (p <0.01); and the group that has high job satisfaction (p <0.01).
Conclusion: Effective communication and team work between human resources for providing medical service of the facility are essential for safe and high-quality medical service to patients. Further, such elements are directly connected to efficiency of the entire team. The reliability between dental technician and Dental personnel for cooperation should not be neglected therefore continuous interests in inter-cooperative partnership is required. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.2.119 | kci_detailed_000199.xml | ||
ART002116639 | oai_dc | 치과 도재용착용 Ni-Cr 합금의 열처리에 따른 결합력 연구 | Study on Shear Bond Strength of Ni-Cr Alloy for Porcelain Fused to Metal Crown at the Temperature of Degassing | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"주규지(광주보건대학교); 신재우(광주보건대학교); 조홍규(광주보건대학교)"
] | Purpose: This study was to evaluate the shear bond strength of ceramic fused to Ni-Cr alloy(Alophaloy) by heat treatment.
Methods: The specimens were divided into 5 groups according to heat treatment conditions prior to porcelain application. Eighteen specimens from each group were subjected to the shear load a universal testing machine using a 0.1㎜/min cross-head speed and two specimens from each group were observed with SEM and EDX line profile.
Results: The observation of the oxide film on the metal surface by SEM photograph showed a coarsening with an increasing degassing hold time. The diffusion of metal oxide was observed farther from the opaque layer in the heat treated specimen than no heat treated specimen. The shear bond strength measured highest to A5(55.23MPa) in the 10min holding group and measured lowest from A1(24.38MPa) in the no heat treated group, and there was a significant difference(p<0.05).
Conclusion: The shear bond strength of Ni-Cr alloy improved in the heat treatment compared to the no heat treatment specimen. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.2.69 | kci_detailed_000199.xml | ||
ART002116625 | oai_dc | 2종류의 버와 3종류의 버를 이용해 제작된 크라운 보철물의 정밀도 평가 | Precision evaluation of crown prosthesis manufactured by two bur and three bur | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김총명(고려대학교); 전진훈(경동대학교); 김웅철(고려대학교); 이재준(고려대학교); 김지환(고려대학교)"
] | Purpose: The purpose of this study was to assess precision of crown prostheses that were fabricated by using 2 kinds of bur or 3 kinds of bur.
Methods: The crowns were fabricated by using the first molar of the right maxillary in this study. The abutments that were prepared were scanned by using a scanner and designed by using CAD software. Based on the crown design, NC data were created with CAM software. The created NC data were used while fabricating the crown prostheses by using 5-axis milling machine. Scanning was done for the internal and external surface of the completed crown prostheses and 3-dimensional measurement was conducted for precision assessment.
Results: The RMS±SD value for the external surface of the crown prostheses that was fabricated by using two burs and three burs were 28.5±4.1㎛ and 19.1±2.8㎛, respectively; and the value for two burs were bigger than that for three burs with statistical significance (p<0.001). The RMS±SD value for the internal surface of the crown prostheses that was fabricated by using two burs and three burs were 14.9±1.9㎛ and 13.3±2.5㎛, respectively;and the value for two burs were bigger than that for three burs but with no statistical significance.
Conclusion: Based on this study, the prostheses that were fabricated by using 3 bur presented better stability compared to those that were fabricated by using 2 bur and statistically significant difference was found only in the external surface. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.2.57 | kci_detailed_000199.xml | ||
ART002116633 | oai_dc | 5축 밀링으로 가공한 PMMA 3본 브릿지의 내면 적합도 평가 | Evaluation of internal adaptation of PMMA 3 - unit bridge manufactured by 5 - axis milling machine | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김총명(고려대학교); 김웅철(고려대학교); 김재홍(경동대학교); 김지환(고려대학교)"
] | Purpose: The purpose of this study was to assess the internal fitness of the PMMA 3-unit bridge that was fabricated with 5-axis milling machine and to verify the clinically allowable values.
Methods: For fabrication of the crown bridge in this study, 25-27 abutment teeth were used. The prepare abutment teeth were scanned with a scanner and 3-unit bridge was designed by using design software. Upon the completion of the design, the 3-unit bridge was fabricated by using a PMMA block with 5-axis milling machine. The internal surface of the fabricated 3-unit bridge was scanned by using a scanner and the difference between the 3-unit bridge and the abutment teeth was assessed by merging them together.
Results: RMS±SD values for PRE group, MOL group, and BRI group were 51.2±18.2, 44.8±10.0, and 52.1±8.3㎛, respectively. The mean of the PRE group was bigger than that of the MOL and BRI group; however, statistically significant difference was not found (p>0.05).
Conclusion: The PMMA 3-unit bridge that was fabricated with 5-axis milling machine presented stable internal values for each crown and overall internal values were within the range of clinically allowable values. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.2.63 | kci_detailed_000199.xml | ||
ART002116642 | oai_dc | 전기화학적 방법에 의한 타이타늄 분극특성 및 나노메쉬 형성 | Characteristics of titanium polarization curve and formation of nanomesh by electrochemical method | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박진서(부산가톨릭대학교); 김부섭(부산가톨릭대학교)"
] | Purpose: The aim of this study was to make nanomesh on the surface of titanium by potentiostatic technique which was done at the suitable potential level.
Methods: In order to find the suitable potential level, use a 25℃ NaCl, NaOH and NH4F solution of 1 M and 5M as supporting electrolyte, working electrode(positive potential) was contact to the titanium specimen and counter electrode(negative potential) was contact to the Pt substrate. At the transpassive potential which was observed by potentiostatic technique, potentiostatic technique was done for 2hours.
Results: As a result, 1 M NaOH solution was suitable as a supporting electrolyte, potentiostatic technique used a 25℃ NaOH solution of 1 M for 2hours, nanomesh was formed.
Conclusion: The potentiostatic technique was used 25℃ NaOH solution of 1 M and 5 M as supporting electrolyte for 2hours. Nanomesh was built more uniform and fine in 1 M NaOH solution than 5 M NaOH solution. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.2.79 | kci_detailed_000199.xml | ||
ART002116646 | oai_dc | 일 대학 치기공과 재학생의 성격유형과 전공 및 직업만족도, 희망직무와의 관계 | The Relationship between the Personality Type, Major Satisfaction, Job Satisfaction and Desired job position of Dental Technology Students | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"권순석(경동대학교)"
] | Purpose: This study aims to offer fundamental data to develop a career program that helps the dental technology students find a proper and desired job position and to be satisfied with their job. To this goal, we analysed the differences found between the personality type, major satisfaction, job satisfaction, and preference in job position among the dental technology students.
Method: We conducted a survey using Myers-Briggs Type Indicator among the subjects who are sophomores and juniors of the dental technology department of a university in Gangwon province. Our analysis was grounded on 130 valid questionnaires.
Results: The results are summarized as follows: In personality type ESTJ turned out the highest as 20.0%, while ENTP was the lowest as 0.8%. The preference was revealed as Extraversion (66.9%), Sensing (74.6%), Feeling (50.8%), Judging (61.5%) respectively. Of the general characteristics, only the religious or non-religious state was statistically meaningful as (p<. 05) in emotional type (F). No statistical significance was found in the major satisfaction. The job satisfaction was statistically meaningful as p<. 05 in Judgemental type (J). GPA was statistically significant as p<. 05 in the sensory type of the personality type. Desired job position was statistically meaningful as p<. 05 in emotional and cognitive types.
Conclusion: We found a meaningful difference in the job satisfaction and the desired job position with respect to the personality type of dental technology students. However clear explanation of the correlations among these factors requires a more comprehensive survey and various approaches from the personality and psychology tests, which is to follow. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2016.38.2.87 | kci_detailed_000199.xml | ||
ART001837422 | oai_dc | 금속-도재관용 Ni-Cr 합금의 표면산화물특성에 따른 전단결합강도 관찰 | Shear Bonding Strength by the Characteristic of Metal Oxidation on the Surface of Ni-Cr Alloy for Porcelain Fused Metal Crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정인성(부산가톨릭대학교); 김치영(부산가톨릭대학교)"
] | Purpose: This study was to observe characteristic of metal oxidation and bonding strength according tocomposition of Ni-Cr alloy for porcelain fused to metal crown. The three kinds of Ni-Cr alloy with differentcomposition ratio of parent metal were observed general properties and chemical properties of each alloy surface andmeasured the shear bonding strength between ceramic and each alloys. The aim of study was to suggest the materialfor design of parent metal’s composition ratio to development of alloy for porcelain fused to metal crown.
Methods: The three kinds of alloy as test specimen was Ni(59wt%)-Cr(24wt%), Ni(67wt.%)-Cr(16wt.%) alloyand Ni(71wt%)-Cr(12wt%)alloy. The oxide on surface was observed by EDX. And the shear test was performed byMTS.
Results: The surface property and oxide characteristic analysis of oxide layer, weight percentage of Element Owithin Ni59Cr24 alloy measured 23.03wt%, Ni67Cr16 alloy measured 21.13wt% and Ni71Cr12 alloy was measured48.55wt%. And the maximum shear bonding strength was measured 58.02Mpa between Ni59Cr24 alloy and vintagehalo(H2 group).
Conclusion: The surface property and oxide characteristic three kind of Ni-Cr alloy was similar. and shearbonding strength showed the highest bonding strength in H2 specimens. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.359 | kci_detailed_000199.xml | ||
ART001837366 | oai_dc | 새로운 광증감제를 사용한 치과용 광중합형 복합레진의 기계적 특성 | Physical Properties of Light Cured Dental Composite Resin with Novel Photosensitizers | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"선금주(광주보건대학교); 이희경(대구보건대학교); 임명신(서울대학교)"
] | Purpose: The purpose of this study was to know the physical properties of UDMA dental composite resins containing two photosensitizers, PD, DA, as a photosensitizer instead of CQ. We want to know Remaining Double Bond(RDB) of UDMA unfilled resin and diametral tensile strength and flexural strength of composite resin containing PD and DA were compared with those of CQ, most widely used photosensitizer for dental composite resins.
Methods: The RDB of UDMA studied by FT-IR spectroscopy increased with irradiation time. The composite resins were tested for their physical properties. The dental composite resins were made with UDMA as a monomer,silanized silica as filler, N,N-dimethylaminoethyl methacrylate (DAEM) as amine initiator, and one of the two kinds of new photosensitizers.
Results: The relative RDB of UDMA was in the order: DA > CQ > PD but the physical properties of the composite resins show PD and DA with higher results compared with that containing CQ. The reason for the results is that PD and DA serve not only as a photosensitizer but also as a photo-crosslinking agent.
Conclusion: PD and DA show as effective photosensizers, suitable for UDMA dental composite resin compare with a higher efficiency than CQ. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.313 | kci_detailed_000199.xml | ||
ART001837340 | oai_dc | 치과용 의치상 아크릴릭 레진 단량체 중량비에 따른 기계적 성질 | The mechanical property investigation according to the monomer weight ratio of the dental acrylic denture base resin | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이희경(대구보건대학교); 선금주(광주보건대학교)"
] | Purpose: This study is to provide basic data of the dental acrylic denture base resin in the mechanical property difference investigation according to the monomer composition weight ratio of the acrylic denture base resin.
Methods: The monomer composition of the acrylic denture base resin and weight ratio makes the different specimen. It measured the mechanical property with the specimens through Hardness Test, Tensile Test, Flexural Test, Flexural Modulus, FT-IR Test.
Results: The control group Vertex was 18.4 Hv and the experimental group MED was 14.46~19.07Hv in the hardness test. Vertex was 364N, MED-3 was lowest in the tensile strength test and the Head of a family cursor declination was big. The result declination of the experimental specimens showed. Vertex and MED-2 was the highestest in the flexural test and after coming MED-6, MED-5, MED-1, MED-3, MED-4. Vertex and MED-2, as to a spectrum for 500~1800 -1 peak can show the excellent degree of polymerization in the FT-IR Test.
Conclusion: The ideal weight ratio of the monomer of the acrylic denture base resin of which the mechanical property is the highestest was MMA 100g, EDGMA 5g, DMA 0.2g, of MED-2. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.287 | kci_detailed_000199.xml | ||
ART001837358 | oai_dc | 임플란트 국소의치 금나사의 3차원 유한요소법 접촉응력 분석 | 3D Dimensional Finite Element Analysis of Contact Stress of Gold Screws in Implant Partial Denture | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이명곤(부산가톨릭대학교)"
] | Purpose: In this research, non-linear three dimensional finite element models with contact elements were constructed. For the investigations of the distributions of contact stresses, 3 units fixed partial dentures model were studied, especially on the interface of the gold screw and cylinder, abutment screw.
Methods: 3 types of models were constructed ; the basic fixed partial denture in molar region with 3 units and 3implants, the intermediate pontic fixed partial denture model with 3 units and 2 implants, and the extension pontic fixed partial denture model with 3 units and 2 implants. For all types, the external loading due to chewing was simulated by applying 45 linguo-buccal loading of 300 N to the medial crown. For the simulation of the clamping force which clinically occurs due to the torque, thermal expansion was provided to the cylinder as a preload.
Results: Under 300 N concentrated loading to the medial crown, the maximum contact stress between abutment screw and gold screw was 86.85~175.86 without preload, while the maximum contact stress on the same area was 25.59~57.84 with preload.
Conclusion: The preloading affected the outcomes of the finite element stress analysis. Reflecting the clinical conditions, the preloading conditions should be considered for other practical study utilizing FEA. For the study of the contact stresses and related motions, various conditions, such as frictional coefficient changes, gap between contact surfaces, were also varied and analyzed. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.303 | kci_detailed_000199.xml | ||
ART001837351 | oai_dc | 치과용 Ti-10%Zr-X%Cr(X=0,1,3)합금의 연삭성 | Grindability of Ti-10%Zr-X%Cr(X=0,1,3) Alloys for Dental Applications | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정종현(광주보건대학교); 신재우(광주보건대학교)"
] | Purpose: The grindability of Ti-10%Zr-X%Cr(X=0,1,3) alloys in order to develop Ti alloys for dental applications with better machinability than unalloyed titanium has been evaluated.
Methods: Experimental Ti-10%Zr-X%Cr(X=0,1,3) alloys were made in an argon-arc melting furnace. Slabs of experimental alloys were ground using a SiC abrasive wheel on an electric handpiece at one of the four rotational speeds of the wheel (12000, 18000, 25000 or 30000rpm) by applying a force(100gf ). Grindability was evaluated by measuring the amount of metal volume removed per minute(grinding rate) and the volume ratio of metal removed compared to the wheel material lost, which was calculated from the diameter loss (grinding ratio). Experimental datas were compared the results with those of cp-Ti(commercially pure titanium)Results: It was observed that the grindability of Ti-10%Zr-X%Cr(X=0,1,3) alloys increased with an increase in the Cr concentration. More, they are higher than cp-Ti, particularly the Ti-10%Zr-3%Cr alloy exhibited the highest grindability at all rotational speeds except 12000rpm. There was significant difference in the grinding rate and grinding ratio between Ti-10%Zr-3%Cr alloy and cp-Ti at all rotational speeds(p<0.05).
Conclusion: The Ti-10%Zr-3%Cr alloy exhibited better grindability at high rotational speeds, great potential for use as a dental machining alloy. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.295 | kci_detailed_000199.xml | ||
ART001837331 | oai_dc | 다공성 티타늄 임플란트의 생리활성물질 담지특성에 관한 연구 | A study of loading property of the bioactive materials in porous Ti implants | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김영훈(원광보건대학교)"
] | Purpose: Surface modification is important techniques in modern dental and orthopedic implants. This study was performed to try embedding of bioactive materials in porous Ti implants.
Methods: Porous Ti implant samples were fabricated by sintering of spherical Ti powders in a high vacuum furnace. It’s diameter and height were 4 and 20 . Embedding process was used to suction and vacuum chamber.
Loading properties of porous Ti implants were evaluated by scanning electron microscope(SEM), confocal laser scanning microscope(CLSM), and UV-Vis-NIR spectrophotometer.
Results: Internal pore structure was formed fully open pore. Average pore size and porosity were 10.253 and 17.506%.
Conclusion: Porous Ti implant was fabricated successfully by sintering method. Particles are necking strongly each other and others portions were vacancy. This porous structure can be embedded to bioactive materials. Therefore bioactive materials will be able to embedding to porous Ti implants. Bioactive materials embedding in the porous Ti implant will induced new bone faster. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.281 | kci_detailed_000199.xml | ||
ART001837318 | oai_dc | 표면처리와 열처리가 전장도재와 지르코니아의 결합력에 미치는 영향 | Effect of surface and heat treatment on the bond strength of veneering ceramics to zirconia(Y-TZP) | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이정환(광주보건대학교); 안재석(광주보건대학교)"
] | Purpose: This study was to assess the effect of surface and heat treatment on the bond strength of veneering ceramics to zirconia.
Methods: The specimens were divided into 7 groups according to surface treatment and heat treatment conditions prior to porcelain application. ten specimens from each group were subjected to a 3-point flexural test. In addition the influence of surface and heat treatment on surface roughness values and phase transformation of zirconia was evaluated. Statistical analysis was performed with one-way ANOVA and post hoc Tukey’s test.
Results: Bond strength ranged from 20.67 3.13 to 32.69 4.52. Bond strength of surface treatment group was lower than that of control group but only Al2O3 sandblasting group was significant difference. Bond strength of heat treatment group was higher than that of surface treatment group but there was no statistical significance.
Conclusion: Bond strength of veneering ceramics to zirconia was affected by surface and heat treatment. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.271 | kci_detailed_000199.xml | ||
ART001837491 | oai_dc | 치과 병·의원의 의료서비스 품질이 환자만족도와 재이용 의도에 미치는 영향 | The influence that the medical service quality of the dental clinic affects to the patient satisfaction and use intention | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정인호(김천대학교); 이숙정(김천대학교); 김병식(수성대학교); 박영대(대구보건대학교); 지경자(영남이공대학교); 박지영(대구보건대학교); 황혜경(대구보건대학교); 이종화(김천대학교)"
] | Purpose: This aim of this paper is to research the influence of customer satisfaction and reutilization on Dentalhospitals and clinics of medical service quality.
Methods: The study examines 140 Patients who received treatment in Daegu from 1 July 2012 to 30 July 2012.
The methods of research were used to factor analysis, reliability test using Cronbach’s factor, correlation analysis,multiple regression analysis and spss/win18.0.
Results: The factor of quality of care has the highest impact on customer satisfaction. the influence of reutilizationdepends on the highest reliability and the physical environment was significant.
Conclusion: To improve customer satisfaction and reutilization is required to maintenance of hospital facilities,medical services mind and quality of care. The medical service providers are important to develop patient educationprograms, self-development and customer satisfaction training techniques. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.387 | kci_detailed_000199.xml | ||
ART001837499 | oai_dc | 치과교정환자의 부정교합상태·교정진료비·구강보건행태가 치과교정만족도에 미치는 영향 | The effect of a malocclusion status of a patient for orthodontic treatment, a fee for orthodontic and oral health behavior on orthodontic satisfaction | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정인호(김천대학교); 이숙정(김천대학교); 임시덕(수성대학교); 김병식(수성대학교); 박영대(대구보건대학교); 박지영(대구보건대학교); 이종화(김천대학교)"
] | Purpose: This article examined the affecting factors of a malocclusion status of a patient for orthodontic treatment, orthodontics medical expenses and oral health behavior on orthodontic satisfaction.
Methods: This paper conducted a survey from the 15th of July to 30th of September 2012 for the patients whowere under orthodontic treatment at three dental clinics where are in Deagu, and distributed a total of 210questionnaires and analyzed 194 questionnaires, excepting for some questionnaires that were answered unfaithfully.
Results: This study classified the related factors into a feeling of satisfaction with treatment and mental satisfactionfor finding orthodontic satisfaction. There were the effect of the right tooth-brushing method, a periodic scalingand orthodontics medical expenses on a feeling of satisfaction with treatment, and power of explanation was 16.7%.
Conclusion: There were the effect of a malocclusion status, matters that requires attention during orthodontictreatment, a periodic scaling during orthodontic treatment and orthodontics medical expenses on mentalsatisfaction, and power of explanation was 16.9%. Based on the result above, this paper concluded that preventivetreatment and early treatment should be emphasized through developing a program for regular oral examinationsuited to each medical type, including the method for improving the medical treatment condition and care servicefor increasing orthodontic satisfaction, which the dental medical-service providers could consider the patients andsecure trust. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.395 | kci_detailed_000199.xml | ||
ART001837402 | oai_dc | ZrN 코팅된 치과 주조용 Co—Cr 합금의 부식거동 | Corrosion Behaviors of ZrN Coated on Dental Co-Cr Alloys | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이상훈(e-디온 치과기공소); 나정숙(진주보건대학교); 장재영(김천대학교)"
] | Purpose: The purpose of this study was to investigate to effect of the ZrN coated on corrosion resistance andphysical property of dental Co-Cr alloys using various instruments.
Methods: The specimens were used, respectively, for experiment, Arc Ion plating was carried out for dental castingalloys using ZrN coated materials with nitrogen gas. ZrN coated surface of each specimen was observed with fieldemission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), vickers hardnesstester, and electrochemical tester.
Results: The current density of ZrN coated specimen was smaller than that of non-coated specimen in 0.9%NaCl solution. Pit nucleated at scratch of specimen. The pitting corrosion resistant Emax- Erep increased in orderof ZrN coated (110 mV), and non-coated wire (100 mV).
Conclusion: The corrosion potential of the ZrN coated specimen was comparatively high. the surface of ZrNcoated specimen was more smooth than that of other kinds of non-coated specimen. ZrN coated surface showedhigher hardness than that of non-coated surface. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.343 | kci_detailed_000199.xml | ||
ART001837413 | oai_dc | 금속-도재관용 Ni-Cr합금의 조성변화와 소성단계에 따른 전단결합강도 | Observation of Shear Bonding Strength by Compositional Change and Firing Steps of the Ni-Cr Alloy for Porcelain Fused Metal Crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조용완(부산가톨릭대학교 치기공학과); 홍민호(부산가톨릭대학교); 김원영(부산가톨릭대학교 치기공학과); 최성민(부산가톨릭대학교); 정인성(부산가톨릭대학교)"
] | Purpose: This study was observation shear bonding strength by compositional change and firing step of a Ni-Cralloy for porcelain fused metal crown. The aim of study was to suggest the material for firing step of Ni71-Cr14alloy to development of alloy for porcelain fused to metal crown.
Methods: The test was on the two kinds of Ni-Cr alloy specimens. The surfaces of two alloys were analyzed byEDX in order to observe oxide characteristic. And the shear test was performed by MTS.
Results: The surface property and oxide characteristic analysis of oxide layer, weight percentage of Element Owithin Ni71Cr14 alloy measured 23.32wt%, and Ni59Cr24 alloy was measured 23.03wt%. And the maximum shearbonding strength was measured 58.02 between Ni59Cr24 alloy and vintage halo(H4 group).
Conclusion: The surface property and oxide characteristic three kind of Ni-Cr alloy was similar. and shearbonding strength showed the highest bonding strength in H4 specimens. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.353 | kci_detailed_000199.xml | ||
ART001837451 | oai_dc | 의치 환자의 구강상태와 자가관리 인식 및 주관적 저작능력이 의치 만족도에 미치는 영향 | Oral health and self-management recognition of patients with dentures and subjective work ability effect of denture satisfaction | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이숙정(김천대학교); 김병식(수성대학교); 정인호(김천대학교); 박영대(대구보건대학교); 이동건(대구보건대학교); 박지영(대구보건대학교); 황혜경(대구보건대학교); 이종화(김천대학교)"
] | Purpose: The purpose of this study is to investigate self management and subjective chewing ability and providethe basic information to research of healthy life of old people from development of education and method fordental health of denture patient.
Methods: From 15th or August to 15th of September in Daegu and Gyeong-buk, denture patients were targetedfor a survey. Data from 295 people were analyzed.
Results: Adjusted R2 of oral health and denture satisfaction of an object of study increased to 24.9%(F=20.460,p<.001). Adjusted R2 of denture custody and method of sterilization was 37.8% and Adjusted R2 of recognitiondenture satisfaction of chewing effect was 14.4% which affect to most(F=9.274, p<.001).
Conclusion: In conclusion denture condition, denture custody, method of sterilization, chewing effect influenceoral health, healthy life of patients who have denture. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.367 | kci_detailed_000199.xml | ||
ART001837516 | oai_dc | 20대 여성 정상교합자에서 임상치관의 순·설측 경사도와 근·원심 경사도에 관한 연구 | A Study on Clinical Crown Angulation and Inclination of Females in the Twenties with Normal Occlusion | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조홍규(광주보건대학교)"
] | Purpose: This study is to present a standard value for clinical crown angulation and inclination required inlaboratory process and see if the value can be used for actual laboratory process.
Methods: In order to find out a standard value for clinical crown angulation and inclination, this study made astudy model of normal occlusion of 21 females in twenties. The clinical crown angulation and inclination of bothsix-maxillary and six-mandibular anterior teeth are measured by Set-up Model Checker. From the measured valueabove, the mean and standard deviation of the twelve teeth are obtained, and then the mean of the teeth betweenright and left side is calculated.
Results: Each clinical crown angulation of maxillary central incisor, lateral incisor, and canine is like this; 1.01.3 , 3.0 1.3 , and 5.0 1.4 . In case of mandibular, each degree is like this; 0.6 1.1 , 1.5 1.1 , and4.1 1.1 . Each clinical crown inclination of maxillary central incisor, lateral incisor, and canine is like this; 6.11.8 , 4.5 1.9 , and -6.2 1.4 . In case of mandibular, each degree is like this; 0.3 1.5 , 0.3 1.8 , and-7.5 1.8 .
Conclusion: As the result, the mean value for clinical crown angulation and inclination can be referred to actuallaboratory process. However, the mean value is different from those of the precedent study and an unsatisfied onefor adopting the standard value. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.415 | kci_detailed_000199.xml | ||
ART001837508 | oai_dc | 대학생의 신체 및 정신 건강과 생활스트레스와의 관계 (치기공과, 치위생과 대학생 중심으로) | The Relationship between Physical/ Mental health and life stress of college students (Focusing on department of dental laboratory technology and dental hygiene) | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김연수(원광보건대학교); 유상희(원광대학교)"
] | Purpose: The purpose of this study was to examine the relationship of the general characteristics of health-relatedmajors to their life expectancy scale, depression scale, health perception scale, subjective wellbeing scale, somaticsymptom scale and college life stress scale. And it’s also meant to analyze influential factors for their stress aboutcollege life.
Methods: The subjects in this study were the students who were in the department of dental laboratorytechnology and the department of dental hygiene at a college located in the region of Iksan, North Jeolla Province.
Conclusion: As the worse physical health and worse mental health(life expectancy, depression, health perception,subjective wellbeing and physical symptoms, etc.) of the college students led to heavier stress about college life, howto promote their physical health and mental health should discreetly be considered, and every necessary measureshould be taken to improve their physical and mental health.
Data were gathered in November and December, 2012. The life expectancy scale, depression scale, healthperception scale, subjective wellbeing scale, physical symptom scale, somatic symptom scale and college life stressscale of the general characteristics were analyzed by t-test and one way analyses of variance (ANOVA) and theDuncan’s multiple range test at the 95% confidence level to assess the statistical significance. And stepwise multipleregression analysis was conducted to determine what factors would affect the stress of the students about college life.
The data were analyzed with the windows ver. 12.0(SPSS GmbH, Germany) statistical software program.
Results: Among the general characteristics, there were significant differences according to gender and age in all thevariables that were life expectancy scale, depression scale, health perception scale, subjective wellbeing scale, physicalsymptom scale and college life stress scale. 61.3% of the students responded they slept for six hours or less, and therespondents who slept for six hours or less scored significantly statistically lower in health perception scale,subjective wellbeing scale and physical symptom scale. As for college life stress, the respondents who got depressedmore often, whose subjective peace or happiness was lower, whose life expectancy was lower, who had worse physicalsymptoms, whose living standard was lower and whose academic year was lower were under heavier stress abouttheir college lives. Conclusion: As the worse physical health and worse mental health(life expectancy, depression, health perception,subjective wellbeing and physical symptoms, etc.) of the college students led to heavier stress about college life, howto promote their physical health and mental health should discreetly be considered, and every necessary measureshould be taken to improve their physical and mental health. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.405 | kci_detailed_000199.xml | ||
ART001837389 | oai_dc | 석고 모형으로부터 분리 배양된 미생물에 관한 연구 | A study on isolated microorganisms from dental cast | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최주영(대구보건대학교)"
] | Purpose: This study was examined the characteristics of bacteria isolated from the dental stone that is made ??inthe dental laboratory.
Methods: 104 dental stones samples were collected from the 4 dental laboratory. Characteristics of bacteria wereinvestigated by microorganism isolation culture method using a Blood Tryptic Soy Agar(TSA) medium.
Results: The detected various bacteria was confirmed as pathogenic bacteria, non-pathogenic bacteria and naturalbacteria.
The isolated bacterial number was confirmed 2.9 103CFU and maxium bacterial number of 3.0 104CFU.
Conclusion: Therefore, infection prevention education is required, it must be to live up the hand-washing andwear protective clothing to protect themselves when working in a dental laboratory. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.321 | kci_detailed_000199.xml | ||
ART001837465 | oai_dc | 치과기공(학)과 학생의 정서지능이 대인관계와 심리적 행복감에 미치는 영향 | The Effect of Emotional Intelligence on Interpersonal Relationships and the Psychological Happiness of Department of Dental Laboratory Technology Students | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"송재상(김천대학교); 임병철(김천대학교); 김경미(김천대학교); 임시덕(수성대학교); 김재도(수성대학교); 김병식(수성대학교); 박영대(대구보건대학교); 이종화(김천대학교)"
] | Purpose: This research conducted by using Department of Dental Laboratory Technology students investigatesinterpersonal and emotional intelligence impact on psychological happiness.
Methods: Study was conducted in the Daegu-Gyeongbuk area Department of Dental Laboratory Technologystudents, based on 132 people who were enrolled college students. Data analysis, frequency analysis, factor analysis,reliability test, correlation analysis, multiple regression analysis was carried out and SPSS/WIN 18.0 was used.
Results: Interpersonal factors utilize emotions, emotional self-control and emotional awareness. Others turnedpositive (+) was found to affect the psychological, emotional factors utilized in euphoria, emotional adjustment andwere found to have positive effects.
Conclusion: Looking at the above results gathered from dental engineering students, improvement ininterpersonal relationships, and psychological welfare have improve more effectively through utilizing andcontrolling emotions, including the ability to set their own goals for the future. Motivational training programs forstrengthening study habits is more important than what can be based in dental college engineering students. Inconjunction with an active lifestyle, future professional dental health services for patients and clinicians care aboutthe improvement of his own psychological happiness was inspire by the care received from home and school and theresulting map is considered to require constant attention. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.377 | kci_detailed_000199.xml | ||
ART001837397 | oai_dc | 중합 조건에 따른 간접복합레진의 굴곡강도 | Flexural strength of indirect composite resin with different polymerization conditions | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"금영희(부산가톨릭대학교 대학원); 김부섭(부산가톨릭대학교)"
] | Purpose: The purpose of this study was to evaluate the flexural strength of indirect composite resins with differentpolymerization conditions.
Methods: Ten specimens (2 2 25 ) of each composite resins (Tescera (T), Gradia (S) and Sinfony (S))were fabricated by two polymerization methods : manufacturers’s and light heat pressure. Composite resinspolymerized by manufacturers’s method and light heat pressure served as control (TS, GS and SS) andexperimental groups (TE, GE and SE), respectively. The composite resins were tested for flexural strength and thesurface of composite resins were observed with scanning electron microscope (SEM) under X1,000 magnification.
Results: The flexural strength values of cured composite resin decreased in the following order: TE (195.4 ), TS(179.8 ), GE (169.9 ), SE (137.7 ), SS (111.1 ) and GS (100.9 ) groups.
Conclusion: The flexural strength values between the control and the experimental groups were not significantlydifferent although experimental groups showed higher flexural strength values than control groups. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2013.35.4.333 | kci_detailed_000199.xml | ||
ART002014333 | oai_dc | 일부 노인의 구강내 상태에 따른 구강건강관련 삶의질 차이에 관한 연구 | The oral status of the elderly in some states difference between oral health-related quality of life | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박종희(김천대학교)"
] | Purpose: Recently our country is rapidly aging population is growing. In the oral cavity of the elderly status of oral health-related quality of life to evaluate any impact.
Methods: The survey used structured self administered questionnaires from April to May in 2011 in Daejeon and Chungcheong provinces to 277 people, analysis of the general characteristics of a frequency analysis method, the difference between the quality of life T / F test, whether oral self-according to the quality of life healthy oral health effects of the multiple regression analysis.
Results: Award comes on the number of residual value, lower age all the more, smaller monthly income was small, but significant difference between them was no difference between gender.
Residual value according to the number of differences in the quality of life of physical pain upper, physical disability, the lower the physical pain, physical disability, psychological disability were significant differences in degradation. Depending on oral maxillary prosthesis fitted to physical pain, psychological discomfort, physical disability, the lower the functional limitation, physical pain, there was a significant difference in physical disability.
Conclusion: Status of the oral cavity of the elderly factors affecting the quality of life remaining in the lower dimensions, upper and lower prosthetics, self-aware state of oral health in order to improve the quality of life of elderly oral health education to be strengthened to increase the residual value, reducing their own prosthetic perceived oral health is health, so they feel it should be for the development of health education programs for the elderly should be. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.1.51 | kci_detailed_000199.xml | ||
ART002014331 | oai_dc | 치과기공사 실기시험 개선에 관한 조사 연구Ⅱ | The Study on the improvement of dental technician practical examination Ⅱ | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"배은정(고려대학교); 김기백(고려대학교); 유진호(마산대학교); 김지환(고려대학교); 김웅철(고려대학교); 이규선(동남보건대학교)"
] | Purpose: The purpose of this study is to investigate the improvement measures of dental technician practical examinations.
Methods: A survey was performed on 37 professors through a questionnaire. The results were analyzed by SPSS 12.0. The collected data was analyzed by frequency and the chi-square test.
Results: The education compared to the satisfaction of practice examinations only differs in the method of enforcement(p<.05). The evaluations on the ability to perform the job with practical subjects were inadequate (37.8%). Questions with the most necessary work tools through the articulator was highest at 48.7%, Electric wax carver was 32.4%, and heating clear was 3.5%.
Conclusion: There must be an improvement to increase the cooperation within the clinical department, while considering the practical exam environment. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.1.39 | kci_detailed_000199.xml | ||
ART002014327 | oai_dc | 치과용 지르코니아 블록의 소결온도가 기계적 특성과 미세구조에 미치는 영향 | The Effects of Sintering Temperature Influence on the Mechanical Property and Microstructure of Dental Zirconia Block | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조준호(경상대학교); 서정일(경상대학교); 배원태(경상대학교)"
] | Purpose: Generally dental technicians clinically decide the sintering temperature of zirconia artificial teeth to match the color of the teeth. However, the sintering temperature influence the microstructure and mechanical strength of ceramic body. In this study, to evaluate the free choice of sintering temperature which leads to color the problems in zirconia false teeth, the variation of microstructure, mechanical strength, and colortone of zirconia ceramics according to the change of sintering temperature was investigated.
Methods: Bar type specimens were prepared from commercial zirconia blocks by cutting and polishing into 0.8 (L) 1.0 (W) 4.8 (H). Specimens were fired from 1,400 to 1,700 at 50 intervals and held for 1hour at highest temperature. Apparent porosity, water absorption, firing shrinkage, bulk density, bend strength, whiteness were tested. Microstructures were observed by SEM.
Results: When fired above 1450 , all specimens showed 0% apparent porosity and water absorption, 20% firing shrinkage, and 6.1g/ bulk density regardless of firing temperatures. SEM photomicrographs showed grain growth of zirconia occurred above 1,600 . Whiteness was also largely changed above this temperature. Maximum bend strength of 1,050 was obtained at 1,550° . Bend strength lowered slightly above this temperature and showed 950ßÁ at 1,700 .
Conclusion: In order to fit the colortone of zirconia artificial teeth, arbitrary choice of firing temperature higher than 1,500 , up to 1,700 did not influence the mechanical strength. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.1.9 | kci_detailed_000199.xml | ||
ART002014329 | oai_dc | 백색광과 청색 LED 방식의 광학스캐너로 채득된 디지털 모형의 비교분석 | Comparative analysis on digital models obtained by white light and blue LED optical scanners | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최석순(신구대학교); 김재홍(고려대학교); 김지환(고려대학교)"
] | Purpose: The purpose of this study was to analyze and compare the relative accuracy of digitized stone models of lower full arch, using two different scanning system.
Methods: Replica stone models(N=20) were produced from lower arch acrylic model. Twenty digital models were made with the white light and blue LED(Medit , Korea) scanner. Two-dimensional distance between the landmarks were measured on the Delcam CopyCAD (Delcam plc, UK). Independent samples t-test was applied for comparison of the groups. All statistical analyses were performed using the SPSS software package(Statistical Package for Social Sciences for Windows, version 12.0).
Results: The absolute disagreement between measurements made directly on the two different scanner-based dental digital models was 0.02~0.04mm, and was not statistically significant(P>0.05).
Conclusion: The precision of the blue LED optical scanner was comparable with the digitization device, and relative accuracy was similar. However, there still is room for improvement and further standardization of dental CAD technologies. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.1.17 | kci_detailed_000199.xml | ||
ART002014330 | oai_dc | 치과기공사 국가시험 실기시험 제도 개선에 관한 연구 | A Study on Improvement of Dental Technicians practical examination system | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"남상용(대구보건대학교); 정인성(부산가톨릭대학교); 이규선(동남보건대학교); 김지환(고려대학교 일반대학원 보건과학과 치의기공전공); 유진호(마산대학교); 이선경(경동대학교)"
] | Purpose: The purpose of this study is to investigate the improvement measure of dental technicians practical examination system.
Methods: The subjects in this study were 290 dental technicians who were self-written questionnaire. The results were analyzed by SPSS 16.0. The collected data was analyzed by frequency and chi-square test.
Results: Dental technician practical exam feasibility of survey were largely negative views. Articulators work required in practical exam as a tool used (28.7%), electric wax carver (19.5%), heating clear (17.8%), handpiece (16.2%) had a response. Dental Technician positions in accordance with practical exam in comparison to satisfaction, the professor is satisfied, but the clinical dental technicians were generally dissatisfied (p<0.05).
Conclusion: Based on the results of this study, Current is necessary to analyze the practical test. It also should be compared with foreign institutions.
Long-term and short-term improvement examination system that can be applied to the improvement of the dental technician to draw practical test it is necessary to improve the system. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.1.27 | kci_detailed_000199.xml | ||
ART002014249 | oai_dc | 유리섬유 보강재 첨가에 따른 레진 의치상의 강화효과 | Strengthening effect of resin denture base by glass fiber reinforcement addition | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김총명(고려대학교); 김지환(고려대학교); 김혜영(고려대학교); 김웅철(고려대학교)"
] | Purpose: The aim of this study was analyzed by comparing the effect of glass fiber reinforcement addition on the strength of resin denture base. It was intended to provide a reference data useful for clinical application.
Methods: The test specimens (length 64.0 0.1 , width 10.0 0.1 , thickness 1.0 0.1 , 1.5 0.1 , and 2.0 0.1 respectively) were made. In the experimental groups resin denture base reinforced with glass fiber were fabricated. In the control groups resin denture base were fabricated by conventional method. After specimen fabrication was completed, transverse test was performed using a universal testing machine.
Results: The transverse strength value in CON group was 83.08 9.07 for 1.0 mm, which ranked the highest in value. On the other hand, the value was 56.07 5.15 for 2.0 , which ranked the lowest in value. And CON+SES group was 119.80 30.70 for 1.0 , which ranked the highest in value. On the other hand, the value was 84.00 7.97 for 2.0 , which ranked the lowest in value. Also, the flexural modulus value in CON group was 2,983.10 506.92 for 1.0 , which ranked the highest in value. On the other hand, the value was 1,257.64 230.48 for 2.0 , which ranked the lowest in value. And CON+SES group was 4,679.41 1578.29 for 1.0 , which ranked the highest in value. On the other hand, the value was 2,512.36 527.09 for 2.0 , which ranked the lowest in value.
Conclusion: The reinforced glass fiber increased the strength of resin denture base, effected to reduce the thickness of resin denture base. | 치의학 | null | http://dx.doi.org/10.14347/kadt.2014.36.1.1 | kci_detailed_000199.xml | ||
ART001804245 | oai_dc | 보건계열학생이 인지하는 치과기공사의 이미지 조사연구 | Research on dental laboratory technician’s image perceived by health allied college students | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김석환(김천대학교); 김재홍(고려대학교)"
] | Purpose: The purpose of this study was to investigate the image and the awareness of dental laboratory technicians in health allied college students.
Methods: The subject of this research are 431 health-related major students who are selected by convenience sampling from Seoul, Gyeonggi-do, Chungcheong-do, Jeolla-do and Gyeongsang-do. After a survey was conducted,the answer sheets from 401 respondents were analyzed except for 30 incomplete ones. The collected data is statistically analyzed by SPSS(Statistical Packages for Social Science 12.0. SPSS Inc., Chicago, IL, USA).
Results: The findings of the study were as follows: As a result of general awareness about dental laboratory technicians, the health allied college students knew 83.0% about dental laboratory technician as a job. Respondents showed high recognition about dental laboratory technician as a job(3.62 0.31), which showed that the health allied college students took a favorable view of dental laboratory in general. There were significant difference in dental laboratory technician image with age, gender(P<.05).
Conclusion: It is required to develop programs such as proactive public relations or campaign via mass media that could enhance the public recognition about dental laboratory technician up to one of professional as required. It is also necessary that dental laboratory technicians make steady efforts for self-development to enhance their own job philosophy and skills in the level of quality, while they need various educations for building up their own favorable personality and positive ideas | 치의학 | null | kci_detailed_000199.xml | |||
ART001804247 | oai_dc | 부정교합과 측두하악장애 유병상태와의 관련성에 관한 연구 | A Study on the Relationship between Malocclusion and the Prevalence of Temporomandibular Disorder | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김홍식(김천대학교); 박수철(김천대학교); 정명희(송호대학교)"
] | Purpose: The study is to discover the relationship between malocclusion, which is known to cause temporomandibular disorder, and temporomandibular disorder and is aimed at college students who have retained their natural teeth.
Methods: The study was aimed at 500 college students at two colleges located in Gyeongsangbuk-do and Daegu metropolitan city and survey research was conducted in order to discover any relationship between malocclusion and temporomandibular disorder. After excluding copies with insincere answers or errors out of the 500 copies of the questionnaire, the study used a total of 435 copies (87%) for research and analysis.
Results: Females showed a prevalence of temporomandibular joint clicking and temporomandibular joint pain,and students who had crowding showed a high prevalence of temporomandibular joint pain, temporomandibular joint clicking, and trismus. Students whose occlusal condition was not good demonstrated a high prevalence of temporomandibular joint pain, temporomandibular joint clicking, and trismus. Students who had maxillary protrusion showed a prevalence of temporomandibular joint clicking and trimus, whereas students who had mandibular protrusion showed a high prevalence of temporomandibular joint clicking.
Conclusion: Students whose dental condition was crowding and students whose occlusal condition was not good exhibited a high prevalence of three types of symptoms of temporomandibular disorder. Meanwhile student who had maxillary protrusion showed a high prevalence of temporomandibular joint clicking and trismus, while students who had mandibular protrusion showed a prevalence of temporomandibular joint clicking. | 치의학 | null | kci_detailed_000199.xml | |||
ART001804237 | oai_dc | 임플란트 고정체와 지대주의 체결방식에 따른 스크류 풀림토크에 관한연구 | A Study on the Screw Loosening Torque According to the Type of Tightening the Implant Fixture and Abutment | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박수철(김천대학교); 김홍식(김천대학교); 함성원(경일대학교)"
] | Purpose: In this study, the loosening torque test was conducted with three implant products that are produced,approved and sold in Korea, which are manufactured in different fixture and abutment tightening methods (internal submerged type, internal morse taper type, and external type) to examine the loosening torque of the screw according to the method of tightening the implant fixture and abutment.
Methods: In the loosening torque test, the three types of fixtures and abutments with different tightening methods were tightened by rotating them clockwise with a 30 N force using a driver equipped with an electric torque meter. The results of the test are as follows.
Results: The loosening torque values of the internal submerged type, internal morse taper type and external type implants were 24.10 0.742 N , 29.10 1.710 N , and 26.60 1.636 N , respectively.
Conclusion: The screw loosening torque values of the three fixture and abutment tightening methods were analyzed via Kruskal Wallis test layout, and they were significantly different (p<0.05). | 치의학 | null | kci_detailed_000199.xml | |||
ART001804252 | oai_dc | 일 대학 치기공과 재학생의 중도탈락 의도에 영향을 미치는 요인에 관한 연구 | Factors affecting the dropout intention in the dental technology students of D College | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"권순석(경동대학교)"
] | Purpose: This study aims to analyze the factors affecting the dropout intentions of the dental technology students of a college.
Methods: The subject of this study was 76 freshmen and 74 sophomores of dental technician major in an anonymous college. Results from the questionnaire called K-vision diagnosis program were computed by means of t-test, One-Way ANOVA, and correlation analysis.
Results: 1. Total points of the drop out intention came to 782.14 points. Of the five categories concerned with the drop out intention, complain in college satisfaction(50.12points) was the highest and department satisfaction(47.51points) was the lowest. Of 16 subcategories, complaining in administrative supporting system proved the highest as 50.80 points and Inquiry to Professor the lowest(45.56 points). 2. Among the general characteristic gender (p<. 01), student group (p<.01), and credit (p<.05) made a meaningful statistical difference; no statistical significance was found in grade, admission, and dwellings. 3. Of the five categories, statistical significance was shown as follows; Department satisfaction (p<.01), College satisfaction (p<.05) under gender, Department satisfaction (p<.05) in grade, Academic integration (p<.01), Department satisfaction (p<.01) in credit. No statistical meaning was found in admission and dwellings. 4. Statistical significance was found under 16 subcategories as follows: Career identification(p<.01), Academic support system(p<.01), Social activity II(p<.05) in gender area,Inquiry to professor(p<.01), Learning(p<.05), Understanding learning I(p<.05) in grade area, Learning(p<.001),Career identification(p<.001), Understanding learning I(p<.01), Understanding learning II(p<.01), Inquiry to professor (p<.01), Learning ability (p<.05), Occupation (p<.05), Social Activity II(p<.05), Administrative support system (p<.05) in student group area, Credit (p<.001), Career identification (p<.01), Understanding learning I(p<.05) in credit area; admission and dwellings was statistically meaningless. 5. Of the 5 categories academic integration (r=.766) was most relevant to the dropout intention of the subjects and followed by department satisfaction (r=.735), college satisfaction (r=.554), service acceptability (r=.373), and statistical significance was shown as p<.01.
Conclusion: Considering the results of this study, we are in a pressing need for the introduction of policies and programmes aiming at preventing the dropout rates of the dental technician majors at college. In tandem with this,qualitative and viable human resource management of the dental technicians should be implemented. | 치의학 | null | kci_detailed_000199.xml | |||
ART001804213 | oai_dc | 도포법 및 침전법을 이용한 지르코니아의 색조 재현성 비교 연구 | Comparative study of color reproducibility of zirconia using a dipping method and coating method | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이희정(고려대학교); 김재홍(고려대학교); 김웅철(고려대학교); 김지환(고려대학교); 김혜영(고려대학교)"
] | Purpose: The aim of this study was to compare with color reproducibility of the coating method and dipping method using a colour liquid.
Methods: Two groups of square-shaped specimens (10 10 in diameter, 1.5 thickness) were prepared for analysis(n=15/group). The CM(Coating Method) group was fabricated as full zirconia specimens with the coating coloring method and Group DM(Dipping Method) was prepared as specimens of 0.7 mm-thick zirconia plate using the dipping coloring method and veneered with 0.8mm-thick porcelain. Color parameters were measured with ShadeEye NCC spectrophotometer and color differences were calculated using the equation E* = {(L*)2+( a*)2+( b*)2}1/2. Non-parametric statistical methods, the Mann-Whitney test, and the Kruskal-Wallis test were used to analyze the data. Type one error rate was set at 0.05.
Results: Color difference values larger than 7 were observed between specimens with the coating method and the dipping method, which were detectable difference in a clinical setting.
Conclusion: Cautious application of the coating coloring method in a clinical setting and further researches to standardize the coating method are needed. | 치의학 | null | kci_detailed_000199.xml | |||
ART001804241 | oai_dc | 새로운 광증감제 사용에 따른 UDMA 복합수지의 특성 | The properties of UDMA dental composite resin with novel photosensitizers | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"선금주(광주보건대학교)"
] | Purpose: The purpose of this study was to know the availability of two photosensitizers, PD, DA, as a photosensitizer instead of CQ in UDMA dental composite resin. We want to know photopolymerization effect of UDMA unfilled resin and surface hardness of composite resin containing PD and DA were compared with those of CQ, most widely used photosensitizer for dental composite resins.
Methods: The photopolymerization effect of UDMA studied by FT-IR spectroscopy increased with irradiation time and the amount of photosensitizer. Knoop hardness of experimental composite resins prepared by the addition of the photosensitizer content and irradiation time.
Results: The relative photopolymerization effect of UDMA increased in the order of PD > CQ > DA. The composite resin of UDMA containing DA or PD, which shows better Knoop hardness than that containing CQ.
Conclusion: PD and DA show as effective photosensizers, suitable for UDMA dental composite resin compare with a higher efficiency than CQ. | 치의학 | null | kci_detailed_000199.xml | |||
ART001804229 | oai_dc | 치과용 지르코니아 코어에서 착색농도에 따른 색조측정 | Measure of shade differences according to the concentration of dental zirconia coloring liquid | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"배은정(고려대학교); 이희정(고려대학교); 김혜영(고려대학교); 김웅철(고려대학교); 김지환(고려대학교)"
] | Purpose: In this study, in order to provide objective standard of the mixed concentration of the zirconia coloringliquids,compare the shade differences after colored zirconia blocks from different concentrations.
Methods: After immersion for 2 minutes zirconia specimen (1.5 1.5 0.6 0.01 ) in coloring-liquids that produced different concentrations, were sintered in furnace dedicated. Then, it was measured in spectrophotometer and Shadepilot. It has been determined mean and standard deviation of the color difference for each group, and verified by one-way ANOVA using the (version12.0) SPSS WIN Program the difference in shade according to the concentration at the significance level of 95% confidence, it conducted a Tukey’s multiple range test to post-test.
Results: The mean of L* was decreased toward LN35 group, however the mean of a and b was increased(p<.05).
There is a statistically significant difference in the results of L post hoc test of each group was LN15-LN30/LN35,LN20-LN30/LN35, LN25-LN30/LN35, and LN30-LN35 group. The a* group, it was found that there is a statistically significant difference in all groups for each(p<.05). The b* group, it was found that there is a statistically significant difference in all groups except the LN25-LN30(p<.05).
Conclusion: In order to make effective use of the coloring-liquids of zirconia, the device objective, accurate concentration measurement is required, from the present study, we presented evidence basic to this. | 치의학 | null | kci_detailed_000199.xml | |||
ART001753365 | oai_dc | 전자처리 스페클 패턴 간섭법(ESPI)을 이용한 3-유닛 고정성 국소의치의 변형특성 분석 | Deformation Characteristics Analysis of 3-Unit Fixed Partial Dentures by Using Electronic Speckle Pattern Interferometry | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강후원(동아인재대학교); 이철민(동아인재대학교 안경광학과); 양승필(동아인재대학교); 김희진(부산카톨릭대학교 치기공학과)"
] | Purpose: The deformation characteristics induced by non-destructive stresses using piezoelectric transducer(PZT)were analyzed for 3-unit fixed partial dentures manufactured PFM, Everest(CAD/CAM) and Zirkonzahn(copy milling, MAD/MAM) by electron speckle pattern interferometery(ESPI).
Methods: The ESPI analysis after loading the restoration with PZT by applying electric voltage of 900mV at the points of 10 above the base of the prostheses.
Results: PFM and All-Ceramic Everest prostheses showed about 0.1 while that of All- Ceramic Zirkonzahn prostheses showed 0.085 , demonstrating that Zirkonzahn displaced less. For PFM and All-Ceramic Zirkonzahn prostheses, the displacements were large at just below the loading point, while generalize displacement was shown over the loading point and weak connector areas for All-Ceramic Everest prostheses.
Conclusion: We could find that the deformation characteristics induced by non-destructive stresses using PZT analyzed by ESPI were similar to the fracture strengths evaluated using universal testing machine. | 치의학 | null | kci_detailed_000199.xml | |||
ART001753368 | oai_dc | 부정교합 및 교정치료에 따른 저작능력 조사연구 | A study of chewing ability According to malocclusion and orthodontic treatment | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김홍식(김천대학교); 박수철(김천대학교); 김남중(신한대학교)"
] | Purpose: The purpose of this study is to compare and analyze the difference in chewing ability according to the malocclusion and orthodontic treatment for the university students who are adults and consider the effect of the malocclusion and orthodontic treatment on chewing ability.
Methods: This study conducted the survey for 400 students of the two universities located in Daegu,Gyeongsangbuk-do, and except for the poor or erroneous surveys among 400 survey copies of the participants, total 363(90.75%) survey copies were used for the study analysis.
Results: The total result of chewing ability for the food showed that middle-class students had higher chewing ability than high-class students and the students who didn’t get orthodontic treatment had higher chewing ability than the students who are getting orthodontic treatment now. In the chewing ability for various kinds foods, in case of young radish kimchi, the result showed that the students who have a little crowding or normal level of teeth or normal teeth has higher chewing ability than the students who have severe crowding level of teeth, and in case of the foods including kkakdugi or galbi, the result showed that the students who have normal teeth location or the 3rd level malocclusion have higher chewing ability statistically significantly than the students who have the 2nd malocclusion.
Conclusion: For the chewing ability, the middle-class students in the home economic power showed significantly higher chewing ability than the high-class students in the home economic power, and the students who didn't get any orthodontic treatment showed higher chewing ability statistically significantly than the students who are getting orthodontic treatment now. | 치의학 | null | kci_detailed_000199.xml | |||
ART001753352 | oai_dc | 치과주조용 비귀금속 합금의 금속 용출 수준 | Concentration of elemental ions released from non-precious dental casting alloys | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"사공준(영남대학교); 박수철(김천대학교)"
] | Purpose: This study was to assess the extents of the release of metals from the non-precious alloys used for dental casting by measuring the differences in the extents of the release of metals by types of alloys, pH level and elapsed time.
Methods: Uniform-sized specimens(10 each) were prepared according to the Medical Device Standard of the Korea Food and Drug Administration(2010) and International Standard Organization(ISO22674, 2006), using four types of alloys(one type of Ni-Cr and one type of Co-Cr used for fixed prosthesis, and one type of Ni-Cr and one type of Co-Cr used for removable prosthesis). A total of 12 metal-release tests were performed at one-day, threeday,and two-week intervals, for up to 20 weeks. The metal ions were quantified using an Inductively Coupled Plasma-Atomic Emission Spectrometer.
Results: The results showed that the extent of corrosion was higher in the ascending order of Jdium-100 ,Bellabond-Plus , Starloy-C , and Biosil-F . The lower the pH and the longer the elapsed time were, the greater the increase in metal corrosion. At pH 2.4, the release of Ni from Jdium-100 , a Ni-Cr alloy, was up to 15 times greater than the release of Co from the Co-Cr alloy from two weeks over time, indicating that the Ni-Cr alloy is more susceptible to corrosion than the Co-Cr alloy.
Conclusion: It is recommended that Co-Cr alloy, which is highly resistant to corrosion, be used for making dental prosthesis with a non-precious alloy for dental casting, and that non-precious alloy prosthesis be designed in such a way as to minimize the area of its oral exposure. For patients with non-precious alloy prostheses, a test of the presence or absence of periodontal tissue inflammation or allergic reaction around the prosthesis should be performed via regular examination, and education on the good management of the prosthesis is needed | 치의학 | null | kci_detailed_000199.xml | |||
ART001753367 | oai_dc | 지르코니아 블록 폐기물을 이용한 싱글코어의 제조법 | Production of Single Core with Waste Zirconia Block | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조준호(진주보건대학 치기공과); 서정일(경상대학교); 배원태(경상대학교)"
] | Purpose: Waste parts of zirconia blocks and powders were remained after CAD/CAM process. In order to make these residual zirconia fit for practical use, zirconia single cores were produced by drain casting process.
Methods: Remained zirconia blocks were reduced to powders with zirconia mortar, and screened with 180 mesh sieve. Zirconia slip was prepared from waste parts of zirconia by ball milling. Plaster molds for forming cores by slip casting were also prepared. Formed cores were removed from mold after partial drying. Dried cores were biscuit fired at 1,100 for 1hour. Biscuit fired cores were treated with tools to control the fitness and thickness. Finished cores were 2nd fired at 1,500 for 1hour. Microstructure of cross section of core was observed by SEM.
Results: When mill pot was filled with 100g of zirconia and alumina mixed powder, 300g of zirconia ball, and 180g of distilled water, the optimum slip for drain casting was obtained. Gypsum plaster for ceramic forming was more suitable then yellow stone plaster for casting process. SEM photograph showed the microstructure of fully dense with uniform grain size of zirconia and well dispersed alumina grains into the zirconia matrix.
Conclusion: Zirconia single cores were produced by drain casting process. Drain casting is useful process to make these residual zirconia fit for practical use. Further study will be focused on the preparation of the bridge type cores by casting. | 치의학 | null | kci_detailed_000199.xml | |||
ART001753357 | oai_dc | 치과용 스캐너 전용 석고를 이용하여 제작된 3차원 디지털 모형의 정확도 평가 | An evaluation of validity of three dimensional digital model fabricated by dental scannable stone | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김기백(고려대학교); 김수진(고려대학교); 김재홍(고려대학교); 김지환(고려대학교)"
] | Purpose: The purpose of this study was to evaluate the validity of digital models fabricated by dental scannable stone.
Methods: Twenty same cases of stone models(maxillary full arch) were manufactured. Intercanine distance,intermolar distance, two dental arch lengths(right, left), two diagonal of dental arch lengths(right, left) were measured for comparison. Each of ten stone models were measured by digital vernier calipers and scanned by dental scanner. Ten digital models were measured by CAD program. The mean(SDs) values were compared by a Mann-Whitney U test( =0.05).
Results: No statistically significant differences between the two groups were found at intermolar distance, dental arch length(right)(p>0.05). However, intercanine distance, dental arch length(left) and two diagonal of dental arch lengths(right, left) were statistically significant(p<0.05).
Conclusion: Stone models fabricated by dental scannable stone showed larger than digital models | 치의학 | null | kci_detailed_000199.xml | |||
ART001753360 | oai_dc | 치과용 백색광 스캐너를 이용한 impression scanning의 반복 측정에 대한 안정성 평가 | Evaluation on the repeatability of dental white light scanner-based digital impression | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"전진훈(고려대학교); 김웅철(고려대학교); 이경탁(고려대학교); 김혜영(고려대학교); 김지환(고려대학교)"
] | Purpose: The purpose of this study was to evaluate the repeatability of dental white light scanner.
Methods: The impression(Zerosil, Dreve, Germany) were digitized in white light scanner(Identica, Medit, Korea)to create 3-dimensional surface-models. The distribution of the discrepancies between the number of points in the corresponding CRM models and the point clouds in the others were measured by a matching-software(Power-Inspect 2012, Delcam Plc, UK). The discriptive statistics were used for statistical analysis(SPSS 20.0).
Results: The measurement of repeatablity showed very good reliability. The mean(SD) discrepancy value on the white light scanner digital models was 8.7(0.67) , based on SD and absolute mean values.
Conclusion: These in vitro studies showed that repeatability of dental white light scanner is high reliability. These results can be confirmed in further clinical studies. | 치의학 | null | kci_detailed_000199.xml | |||
ART001753363 | oai_dc | 베릴륨이 포함되지 않은 도재용착주조관용 비 귀금속 합금의 재사용에 따른 금속과 도재간의 전단결합강도에 관한 연구 | The study of Shear Bond Strength on recasting of non-beryllium non-precious alloy for Porcelain between Metal | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김소리(고려대학교); 김웅철(고려대학교); 김혜영(고려대학교); 김지환(고려대학교)"
] | Purpose: This study aimed to investigate the shear bond strength for non-precious alloy castings without beryllium, which has been used repeatedly for economical reason.
Methods: The Schmitz-Schulmeyer test method was used to evaluate the shear bond strength between the nonberyllium Ni-Cr alloy Vera Bond 2V(AlbaDent, Inc. USA) and the Ceramco 3(Dentstply, York, PA, USA) porcelain powder.
The maximum loading and shear bond strength were measured. The average shear strength( ) was analyzed with the one-way ANOVA and the Tukey’s test( =.05). The fracture specimens were examined using Microscope to determine the failure pattern.
Results: The mean shear bond strengths(SD) in MPa were group A(100% new metal) control 28.72(3.31); group B(50% new + 50% reused) 27.28(1.13); group C(all reused) 26.61(5.47). Microscope examination showed that group A and B specimens presented mixed failure, and group C specimens showed adhesive failure.
Conclusion: In conclusion, forward this non-precious alloy dose not contain beryllium for how should use a more systematic study and for future advanced research is performed giving effect to be considered desirable. | 치의학 | null | kci_detailed_000199.xml | |||
ART001753354 | oai_dc | 지르코니아의 표면 처리에 따른 전장용 세라믹과의 전단결합강도 | Influence of surface treatments on the shear bond strength between zirconia ceramic and zirconia veneering ceramics | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"안재석(광주보건대학교); 이정환(광주보건대학교)"
] | Purpose: The aim of this research was to evaluate the shear bond strength of different zirconia veneering ceramics with and without liner glass materials to yttria partially-stabilized tetragonal zirconia polycrystalline(Y-TZP).
Methods: Five co mmercial zirconia veneering ceramics were used in this study, E-Max(EM), Creation ZI(CR),Cercon ceram kiss(CE), Triceram(TR) and Zirkonzahn ICE(ZI). All samples were prepared according to manufacturer’s instructions. Experimental industrially manufactured Y-TZP ceramic blocks(diameter: 2.7 ; height:13.5 ) were used in this study. Shear bond strength between zirconia ceramic coping and zirconia veneering ceramics were evaluated by the push-shear bond test. The fracture load data were analyzed using ANOVA and Scheffe’s test( =0.05). The fractured surfaces of zirconia core ceraimc and zirconia veneering ceramics were observed using a scanning electron microscope(SEM).
Results: The mean shear bond strengths ranged from 20 (20.12 6.34 ) to 66.6 (66.62 10.01 ). The Triceram(TRG) showed the highest value and Creation ZI(CR) showed the lowest value. In all groups, Zirconia liner and glass material groups was significantly higher shear bond strength than without liner(P<0.05), with the exception of Cercon ceram kiss(CE)groups.
Conclusion: Zirconia bonding materials may have the advantage of improved bond strength between zirconia ceramic core and veneering ceramics. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780668 | oai_dc | 도재용착주조관용 Co-Cr합금의 주조성 및 결합강도 관찰 | Observation of the Castability and Bonding Strength of a Co-Cr alloy for Porcelain Fused to Metal Crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정인성(부산가톨릭대학교); 김치영(부산가톨릭대학교); 김갑진(부산가톨릭대학교)"
] | Purpose: This study was to analyze the castability, surface oxide characteristic of Co-Cr alloy for porcelain fused to metal crown and the bonding strength of porcelain fused to metal crown. Co-Cr and Ni-Cr alloy for porcelain fused to metal crown was used for tests of the castability and surface oxide state and shear bonding strength by various porcelain. The aim of this study was to suggest the differences of result according to Co-Cr and Ni-Cr alloy.
Methods: The kinds of alloy as test specimen was Co-Cr and Ni-Cr alloy. The castability index on the alloy specimens. The surfaces of two alloys were analyzed by SEM and EDX in order to observe oxide characteristic. And the shear test was performed by MTS.
Results: The castability index of Co-Cr alloy was 96.8% and Ni-Cr alloy was 94.4%. The strongest bonding strength of Co-Cr alloy was shown 67.37 .
Conclusion: The shear bonding strength between Co-Cr alloy and EX3 porcelain was the strongest comparing with others. And all of each alloy was indicated as same level about the castability | 치의학 | null | kci_detailed_000199.xml | |||
ART001780961 | oai_dc | 일부 노인의 구강내 상태와 자가인지 구강건강상태와의 관련성 | A Study on the Relationships of Oral Status and Self-perceived Oral Health Status in Elderly | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박종희(김천대학교)"
] | Purpose: The recent proliferation of the aging population, oral health care is closely related to the mental health of the elderly is very important being recognized. Provide basic data for improving the quality of life for the elderly, to determine whether the oral health of the elderly whether oral self-perception of health and any related wish.
Methods: Surveys to May 20 from April 15, 2011, subjects were elderly and living in Daejeon and Chungnam 277 people were examined. All the statistics using SPSS 18.0 for the determination of statistical significance, and the significance level was 0.05.
Results: 1. Recognized, the most common oral health, self-aware bad the state (46.2%) there was no significant difference in the general characteristics according to self-Oral health status, remaining natural dimensions or the intra-oral prosthetic, there was no significant difference. More teeth, residual phase, in accordance with intra-oral prosthetic mandibular Not all dentures, partial dentures, full dentures net self-perception of oral health status better recognized.
2. According to the type of partial dentures, oral health status self-phase, mixed mandibular removable, fixed,fixed, removable partial dentures in order to recognize that good oral health, self-aware state, showed between them,there was no significant difference.
3. Of variable dimension that has nothing to do with the remaining natural maxillary and mandibular prosthetic maxillary prosthetic mandibular partial dentures, age income, a positive correlation was negatively correlated. The case of the mandible, the mandibular prosthetic mandibular partial denture, maxillary prosthetic, the amount of income were correlated.
4. Intra-oral Prosthetics correlation variables in the maxillary, mandibular prosthesis, the positive correlation between income, age was negatively correlated, if the income of the mandible. Maxillary partial denture has nothing to do with the variable portion of the mandibular denture, age was a negative correlation was found.
Conclusion: Satisfaction and how now it is important simply to live as long, but you need to pay attention to the quality of life, sometimes with an aging population and the increase of soybean To buy the loss of teeth causes the typical health problems of the elderly. Elderly people of any relevant oral health and the oral cavity by the state to determine whether to provide the basic data for oral health education was more residual value, intra-oral prosthetics there is no more self-aware, the oral health status is good to recognize that appeared. Strengthen the oral health education to improve the quality of life of the elderly, and is thought to be necessary to increase the number of residual. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780684 | oai_dc | 도재용착주조관용 Ni-Cr계 합금의 조성에 따른 표면특성 및 전단결합강도 관찰 | The Surface Property and Shear Bonding Strength according to Composition of Ni-Cr alloy for Porcelain Fused to Metal Crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김갑진(부산가톨릭대학교); 정인성(부산가톨릭대학교); 최성민(부산가톨릭대학교)"
] | Purpose: This study was to observe surface property and bonding strength according to composition of Ni-Cr alloy for porcelain fused to metal crown. The two kinds of Ni-Cr alloy with different composition ratio of parent metal were observed general properties and chemical properties of each alloy surface and measured the shear bonding strength between ceramic and each alloys. The aim of study was to suggest the material for design of parent metal’s composition ratio to development of alloy for porcelain fused to metal crown.
Methods: The two kinds of alloy as test specimen was Ni(71wt.%)-Cr(12wt.%) and Ni(63wt.%)-Cr(23wt.%)alloy. The oxide on surface was observed by SEM and EDX. And the shear test was performed by MTS.
Results: The surface property and oxide characteristic analysis of oxide layer, weight percentage of Element O within Ni71Cr12 alloy measured 12.74wt.%, but Ni63Cr23 alloy was measured 15.91wt.%. And the maximum shear bonding strength was measured 106.14 between Ni71Cr12 alloy and vintage halo (VV group).
Conclusion: The surface property and oxide characteristic of Ni71Cr12 alloy was similar to Ni63Cr23 alloy. And VV group has the strongest shear bonding strength. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780664 | oai_dc | 화이버 글라스가 의치상 레진의 기계적 특성에 미치는 영향 | Effect of fiber glass on the physical properties of denture base resins | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박연경(김천대학교)"
] | Purpose: The purpose of this study was to investigate the effect of addition of fiber glass on the physical properties of silanized fiber mesh and non silanized mesh of denture base resins.
Methods: The denture base resins were used in this study heat curing acrylic resins(Vertex Rs, Lucitone 199, 2080 ) and fiber glass(SES, Green B&D co., Ltd, 20 80 ) were used as reinforcement. The specimens were stored in distilled water at 37 2 for 72 hours before test. Bending strength and tensile strength were measured by an universal testing machine(Instron 4301, Instron Corp.). Penetration distribution on fiber was observed by scanning electron microscopy(JSM 840A, Jeol Ltd).
Results: The bending strength and modulus were increased by 30% after adding fiber glass on denture base resins.
Tensile strength showed significant increasing by adding fiber glass on denture base resins.
Conclusion: In this study, Addition of silanized fiber in denture base resins were improved physical properties. we confirmed the fiber glass possibility of the replacement about conventional materials. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780985 | oai_dc | 치기공과 재학생의 건강관련 심신 자각증상에 관한 연구 | A study of the psychosomatic self-reported symptoms of the dental technology students | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"권순석(경동대학교)"
] | Purpose: This study aims to present a database for the development of a healthcare management program based on the survey and analysis of self reported psychosomatic symptoms among the current dental technology students.
Methods: Subjects of our study are 480 dental technology major students enrolled in a third year college located Gyeonggi, Chungcheong, and Gangwon province. Using a random sampling, we conducted a self-report survey from August 30, 2011 to October 28, 2011 and 418 reports were collected as feedback and we put an analysis on them.
Results: 1. The average physical self symptom was 20.49, which is higher than the average mental self symptom(18.54). Of the subcategories of psychosomatic self symptom, we observed multiple subjective symptoms as the highest one(37.77), and aggression as the lowest(13.77). 2. As to gender, both physical and mental self symptom were statistically significant with the scale score of(p<.001). The scale score of subcategories is as follows;multiple subjective symptoms(I, p<.001), eye and skin(B, p<.001), digestive(C, p<.001), impulsiveness(H, p<.001),lie scale(L, p<.001), mental instability(J, p<.001), depression(K, p<.001), aggression(F, p<.001), irregularity of life(G, p<.001), mouth and anal(D, p<.05), nervousness(E, p<.05). 3. As for obesity, statistical significance was shown with the scale scores of physical self symptom(p<.001), multiple subjective symptoms(I, p<.001),digestive(C, p<.001), aggression(F, p<.001), depression(K, p<.01), irregularity of life(G, p<.01), respiratory(A,p<.05), eye and skin(B, p<.05), impulsiveness(H, p<.05), mental instability(J, p<.05). The scale scores in the environmental quality and life satisfaction were shown as follows; depression(K, p<.001), lie scale(L, p<.01), and irregularity of life(G, p<.05). 4. We employed multiple regression analysis to take account of general factors affecting psychosomatic self symptoms, and drew that the explanatory power of the model was proved with the scales of physical self symptom(4.1%) and mental self-symptom(3.6%). Obesity was a factor that affects physical self symptom with the scale score of(p<.01), and environmental quality and life satisfaction(p<.01) and obesity(p<.05) affect mental self symptom. Conclusion: In this analysis we observed obesity of dental technology students can influence their psychosomatic self symptoms. In this sense, it would be reasonable to develop a healthcare management and education programs that help the students maintain a healthy weight and promote their health. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780694 | oai_dc | Orthodontic Acrylic Resin의 중합조건 변화가 최대하중에 미치는 영향 | The Effect of Changes in Polymerization Conditions of Orthodontic Acrylic Resin on Maximum Load | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이규선(동남보건대학교)"
] | Purpose: In order to find out the impact of changes in polymerization conditions of orthodontic acrylic resin on maximum load.
Methods: While maintaining mixing ratio 3:1 of polymer and monomer in spray-on way in the production condition of polymerization temperature 25 or 37 for 10 minutes or 30 minutes of polymerization time by pressure 3kfg/ or 6kfg/ in the lab maintaining 25 of room temperature, the change in maximum load rise rate was tested by producing 5 acrylic resin specimens for orthodontics per group to meet the standards of 25 22 and using INSTRON with the 3rd bar 2mm in diameter and parallel support bending device of 15 0.1as test equipment showing 30.00 /min of crosshead speed, 50 16 N/min of load ratio in the laboratory of 24room temperature and as a result, the following results were obtained.
Results: 1. When increasing pressure from 3kfg/ to 6kfg/ , maximum load was lowered by -4.285%. 2. When increasing polymerization time from 10 minutes to 30 minutes, maximum load rose by 3.848%. 3. When increasing polymerization temperature from 27 to 37 , maximum load rose by 5.854%.
Conclusion: Considering the above test results that polymerization time and polymerization temperature when polymerizing acrylic resin for orthodontics according to changes in working conditions had an impact on the rate of rise of maximum load values but the rate of rise was lowered when increasing pressure from 3kfg/ to 6kfg/ , we came to a conclusion that high pressure more than necessary does not affect the rate of rise of maximum load. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780660 | oai_dc | CAD/CAM 전용 금속 합금과 주조용 합금의 세라믹 결합강도에 관한 연구 | A Study on the Metal-Ceramic Bond Strength of CAD/CAM Metal Disk Alloy and Casting Alloy | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정효경(대구보건대학교); 곽동주(대구보건대학교)"
] | Purpose: The purpose of this study was to evaluate bond strength of Metal Disk alloy and casting alloy.
Methods: Metal specimens were divided into 4 groups for each alloy. Three point flexural test were used to measure the bond strength of CAD/CAM metal alloy and casting alloy. Statistical analysis was done using the Statistical Package for Social Sciences version 19.0 for Windows. As for the analysis methods, the study used Kruskal-Wallis test.
Results: The average bonding strengths of Group 1 to porcelain was 36.7 9.90 , Group 2 to porcelain was 37.68 4.51 , Group 3 to porcelain was 36.43 6.57 , Group 4 to porcelain was 42.88 6.81 , Each group was not significantly different.
Conclusion: Bond strength of Casting alloy is equal to or higher than bond strength of CAD/CAM Metal Disk alloy. Alloy clinical bond strength is 25 MPa, So CAD/CAM Metal Disk alloy can be used as dental material. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780687 | oai_dc | 단일구조 지르코니아(zirconia) 전부도재관의 표면처리에 따른 전장도재와의 전단결합강도 | Effect of surface treatments on the shear bond strength of full-contour zirconia layered with porcelain | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최병환(대구보건대학교); 김임선(대구보건대학교)"
] | Purpose: The aim of this research was to investigate difference in shear bond strengths of full-contour zirconia layered with porcelain.
Methods: Disk-shaped (diameter: 12.0 ; height:3.0 ) zirconia were randomly divided into six groups according to the surface conditioning method to be applied (N=90, n=15 per group): group 1-contol group(ZC); group 2-airborne particle abrasion with 50- Al2O3(5A); group 3-50- Al2O3 + liner(5AL), group 4-110- Al2O3(1A);group 5-110- Al2O3 + liner(1AL); group 6-liner(LC). On each block, zirconia porcelain was build up according to manufacturer’s instructions. All samples were fixed with measuring jigs and shear bond strength were measured with Universal testing machine. Collected data were analyzed using SPSS(Statistical Package for Social Sciences)Win 12.0 statistics program.
Results: LC showed the highest value(29.92 2.55 ) and ZC showed the lowest value(13.22 1.37 ).
Zirconia liner and Alumina oxide groups was significantly higher shear bond strength than control(p<0.05). 5A (without liner 22.18 2.37, with liner 22.84 1.74 ) was higher shear bond strength than 110 (without liner 20.18 2.38, with 20.71 2.67).
Conclusion: Surface treatments may have advantage in bond strength improvement for full-contour zirconia layered with porcelain. | 치의학 | null | kci_detailed_000199.xml | |||
ART001780698 | oai_dc | 전부도재관용 지르코니아의 표면처리에 따른 표면특성 및 계면특성 관찰 | Interface and Surface Properties by Surface Treatment of Zirconia for All Ceramic Crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김치영(부산가톨릭대학교); 정인성(부산가톨릭대학교); 최성민(부산가톨릭대학교)"
] | Purpose: This study was to observe the surface and interfacial characteristic of Zirconia by surface treatment. And it was observed the roughness and contact angle according to processing, and the interfacial properties by surface treatment on zirconia.
Methods: The oxide formation and ion diffusion between core and veneer ceramic were determined by the X-ray Dot Mapping of EPMA(Electron probe micro analyzer). The roughness was measured by 3D Digital microscope and the contact angle according to processing of zirconia was observed using distilled water on the surface.
Results: The surface roughness of the specimens Z04, Z12, Z15 was measured 0.67( 0.03) , 0.50( 0.12) ,0.35( 0.09) , respectively. As results of contact angle test, Z04, Z12, Z15 of specimen group without binder treatment was measured 46.79( 3.17) , 57.47( 4.83) , 56.19( 2.66) , respectively. but, L04, L12, L15 of specimen group without binder treatment was measured 63.84( 2.20) , 66.08( 0.16) , 65.10( 1.01) ,respectively. Average contact angle of L15 was measured 65.10( 1.01) . In X-ray Dot Mapping results, thickness of binder including Al element was measured that each of L04, L12, L15 were 20 , 15 , 10 .
Conclusion: The more rough surface increases the wettability, but the sintered exclusive binder decreases the wettability. | 치의학 | null | kci_detailed_000199.xml | |||
ART001729549 | oai_dc | 보건계열학과와 비보건계열학과 학생들의 구강위생지식 및 관리 실태 | Oral Hygiene Knowledge and the Actual Condition of Oral Care for the Students in the Public Health and non-Public Health Departments | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이종도(대구보건대학교); 신두만(대구보건대학교); 박종탁(대구보건대학교)"
] | Purpose: This study was to investigate oral hygiene knowledge and the actual condition of oral care for the students in the public health and non-public health Departments.
Methods: The survey sample consisted of 262 randomly selected students. 197 of them are public health-related students and 65 are non-public health-related students. The questionnaires used in this study consisted of 4 items for general information, oral health status of 2 items, 5 items for Oral hygiene knowledge and actual condition of oral care of 5 items. Collected data were analyzed by Frequency Analysis t-test and Crosstabs using SPSS(Statistical Package for Social Sciences) Win 19.0 statistics program.
Results: Regarding general characteristics of the subjects, there were 53.8% of first-year student, 26.0% of secondyear student and 20.2% of third-year student among 52.3% of males and 47.7% of females.
The subjects received less than “100,000” won(13.0%), “100,000-190,000” won (5.0%), “200,000-290,000”won(30.9%), “300,000-390,000” won (33.2%) and more than “400,000” won(17.9%) a month for an allowance.
The subjects had ‘none’ (44.3%), ‘1’(6.5%), ‘2’(12.6%), ‘3’(5.0%), ‘4’(5.3%), ‘more than’ 5(0.8%) of dental caries and ‘do not know’ were 25.6%. The numbers of dental prosthetics were ‘no’ (35.5%), ‘1’(13.7%), ‘2’(17.2%),‘3’(10.3%), ‘4’(11.5%), and ‘more than 5’(11.8%).
The public health students(84.8%) had a higher positive response rate than the non-public health students(66.2%). The public health students(80.2%) had a higher negative response rate than the non-public health students(78.5%) in the result of onset of gum disease pain awareness. The non-public health students(65.5%) had a higher negative response rate than the public health students(68.3%)) in the result of heredity of gum disease.
The t-test showed that public health-related department students(M=8.264, SD=0.821) had more knowledge about oral hygiene than non-public health-related department students(M=8.015, SD=1.082).
‘do not use’ in the oral care products except toothpaste and toothbrush showed that public health-related department students(60.4%) use the products more than non-public health-related department students(66.2%).
Conclusion: In this study, public health-related department students had higher oral hygiene knowledge and actual condition of oral care compared to non-public health-related students, but low in practical action. Due to the lower level of dental care products use in non-public health-related department, a continuous oral care education program is required. | 치의학 | null | kci_detailed_000199.xml | |||
ART001729556 | oai_dc | 치과기공분야에서의 직업기초능력수준과 요구도에 관한 연구 | A Study of the Cognition and the Requirement on the Key Competency of Dental Technology | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"황재선(동남보건대학교)"
] | Purpose: The purpose of this study is analyzing how much students of dental technology possess core competencies and cognition between dental technicians and students.
Methods: The subjects of this study were dental technicians, dental technology students and a self-administered structured questionnaire survey wax conducted for 428 selected people. Collected data were analyzed using SPSS Win 20.0 statistics program and analysis techniques include the frequency, t-test, One-way ANOVA.
Results: The results of the survey are as follows.
The cognition of key competency according to the gender in the students showed differences in interpersonal ability, information ability and the requirement of key competency according to the gender in the students showed differences in speaking ability, listening ability, problem solving ability. The cognition of key competency according to the grade in the students showed difference in speaking ability, listening ability and the requirement of key competency according to the grade in the students showed difference in comprehension of organization ability. The speaking ability is the lowest in the cognition of key competency according to the gender, grade, experience of clinical training in the students and the skill ability is the highest in the requirement of key competency according to the gender, experience of clinical training in the students.
The cognition of key competency according to the career in the dental technicians showed difference in problem solving ability, self-regulation and self-development ability, skill ability and the requirement of key competency according to the career in the dental technicians showed difference in writing ability. The cognition of key competency according to the educational background in the dental technicians showed difference in comprehension of organization ability. The foreign language ability is the lowest in the cognition of key competency according to the career, job in the dental technicians and the skill ability is the highest and the math ability is th lowest in the requirement of key competency according to the career, place of employment in the dental technician.
]Conclusion: This study can be used as basic data for dental technology that are available not only to field-oriented disciplines but also to overall higher education fields which aim to strengthen key competency | 치의학 | null | kci_detailed_000199.xml | |||
ART001729492 | oai_dc | 관교의치용 Au-Ag-Cu-Pt-Zn 합금의 시효경화성과 관련된 상변태와 입계석출 | Phase transformation and grain boundary precipitation related to the age-hardening of an Au-Ag-Cu-Pt-Zn alloy for crown and bridge fabrication | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조미향(원광보건대학교)"
] | Purpose: The age-hardening mechanism of an Au-Ag-Cu-Pt-Zn alloy for crown and bridge fabrication was investigated by means of hardness test, X-ray diffraction study and field emission scanning electron microscopic observation.
Methods: Before hardness testing, the specimens were solution treated and then were rapidly quenched into ice brine, and were subsequently aged isothermally at 400-450 for various periods of time in a molten salt bath and then quenched into ice brain. Hardness measurements were made using a Vickers microhardness tester. The specimens were examined at 15 kV using a field emission scanning electron microscope.
Results: By the isothermal aging of the solution-treated specimen at 450 , the hardness increased rapidly in the early stage of aging process and reached a maximum hardness value. After that, the hardness decreased slowly with prolonged aging. However, the relatively high hardness value was obtained even with 20,000 min aging. By aging the solution-treated specimen, the f.c.c. Au-Ag-rich 0 phase was transformed into the Au-Ag-rich 1 phase and the AuCuⅠ ordered phase.
Conclusion: The hardness increase in the early stage of aging process was attributed to the formation of lattice strains by the precipitation of the Cu-rich phase and then subsequent ordering into the AuCuⅠ-type phase. The decrease in hardness in the later stage of aging process was due to the release of coherency strains by the coarsening of tweed structure in the grain interior and by the growth and coarsening of the lamellar structure in the grain boundary. The increase of inter-lamellar space contributed slightly to the softening compared to the growth of lamellar structure toward the grain interior. | 치의학 | null | kci_detailed_000199.xml | |||
ART001729527 | oai_dc | 치과기공사의 직업 및 직무만족도에 관한 연구 -Denture part 근무자를 중심으로- | A study on Job and Duty Satisfaction of Dental Technicians (Focusing on employees in denture part) | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이화식(대구보건대학교); 배봉진(대구보건대학교); 한석윤(대구보건대학교)"
] | Purpose: This study was survey on future job vision and its pride (self-esteem) of dental technicians. It also investigates the future vision on their major of job (denture) and its awareness to improve the work environment and enhance their satisfaction towards job and duties.
Methods: In order to research job and its duty satisfaction of dental technicians who mainly work at denture part,certified questionnaire was modified and upgraded for its use.
Collected documents were used by ‘Window SAS 8.0 Program’ for analysis. The significance of the test related to the items and its standards has been decided for p<0.05.
To find out the differences between choices when choosing career and the duty satisfaction, t-test, one-way ANOVA and two-way ANOVA have been used.
Results: Following research findings show: 1. There was high self-esteem towards the job as dental technicians but low in future job vision. 2. It has been found that if satisfaction on their job (dental technician) is high then also their satisfaction on its duty (denture part) is high. 3. The factors that affects mostly on duty satisfaction of denture part are ‘the contribution on improving oral cavity of people’( =0.33118), ‘The possibility of growth of person’s job choices’( =0.30035) and ‘person’s satisfaction on choosing job’( =0.16069). 4. If there is an increase level on the contribution of improving people’s oral cavity, the possibility of growth of person’s job choices and the person’s satisfaction on choosing job, then there is also high growth in denture part’s duty satisfaction. 5. It has been found that if there are more employment histories of denture part, the duty satisfaction of denture part were also high. On the other hand, the more employment history of dental technicians get, the duty satisfaction of their denture part was low.
Conclusion: Following research results show that there is high self-esteem towards the job as dental technicians but the vision towards future was low. This shows that there is no bright future on dental technology. Therefore, it is important that not only to improve the work environment and pay rise on dental technologists but also to satisfy them. Various program developments and continuous research are needed to increase satisfaction | 치의학 | null | kci_detailed_000199.xml | |||
ART001729520 | oai_dc | 대학생의 일반적 특성 및 교정치료에 따른 자존감 비교연구 -대구,경북지역 대학생을 중심으로- | A Comparative Study of University Student’s Self-Esteem According to General Characteristics and Orthodontic Treatment | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김홍식(김천대학교); 송재상(김천대학교); 임병철(김천대학교)"
] | Purpose: The goal of this study is to investigate the correlation of orthodontic treatment with self-esteem and how orthodontic treatment has an effect on university student’s self-esteems by investigating and analyzing the difference in self-esteem of each general characteristic and the difference in self-esteem according to the existence or nonexistence of malocclusion and orthodontic treatment for adult university students.
Methods: This study conduced a survey for 420 university students including dental related department,department of health and department of non-dental health in two universities located in Taegu, Gyeongbuk-do province from May 15, 2012 to May 30, 2012, and in 420 questionnaires of the investigated 420 target students,total 400(95.2%) questionnaires except for the questionnaires with falsely or erroneous responses were used for study analysis.
Results: In the relations of general characteristic with self-esteem, for self-esteem by each gender, male student showed higher, for self-esteem by residential area, the university student residing at metropolitan area showed higher, for self-esteem by financial status, high class and middle class students in home financial status showed higher, for self-esteem by face shape, the student with triangular face shape showed higher, and in the relation of self-esteem with orthodontic treatment, the university student who is getting orthodontic treatment showed higher self-esteem statistically significantly.
Conclusion: For gender, male university student, for residential area, the university student residing at metropolitan area, the high class university student in financial status, the university student with triangular face shape, and the university student who is getting orthodontic treatment showed statistically significantly higher self-esteem. | 치의학 | null | kci_detailed_000199.xml | |||
ART001729541 | oai_dc | 노인틀니 건강보험 급여화에 대한 치과기공사의 인식도 조사 연구 | Dental technician’s recognition of national health insurance coverage of denture | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강월(고려대학교); 임형택(한양대학교)"
] | Purpose: The purpose of this study was to examine the recognition of dental technician's about including denture into the coverage of the national health insurance.
Methods: This study carried out self-administered questionnaire survey from June 10, 2012 to June 20 by having research subjects as 230 dental technician. Except 22 copies with incomplete response, 208 copies were used as the materials of final analysis.
Results: The recognition of dental technician on the national health insurance of denture was 48%, but there was a low recognition on the details. The rates of dental technician who approved of the inclusion of denture into the coverage of the health insurance respectively stood at 59%.
Conclusion: The coverage of the health insurance should be extended to dental medicine in a manner to satisfy dental technicians, dental service providers and receivers. Also, further studies for the extending coverage of the details are needed | 치의학 | null | kci_detailed_000199.xml | |||
ART001729544 | oai_dc | 노인들의 의치 장착 기간과 의치 사후 관리에 영향을 주는 요인 -경북 농촌지역을 중심으로- | Factors Affecting Period of weared and Post Management of Denture of the Elderly (Rural areas in Gyoungbook Province) | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"한석윤(대구보건대학교); 배봉진(대구보건대학교); 이화식(대구보건대학교)"
] | Purpose: In order to validate empirically the theoretical model of this study subjects, who were limited in Andong gun, Youngyang gun, Uiseong gun, Bonghwa gun, Chilgok gun, Cheongsong gun according to residence-specified distribution and over aged 65, were focused to the elderly in rural areas with geographical characteristics where they have difficulties in accessibility of dental facilities and dental care.
Methods: The collected data were analyzed by the SPSS 19.0 program. First, the frequency analysis was performed for each independent variable and the dependent variable.Second, reliability analysis and correlation analysis were conducted for daily living skills and Biomedical Vigilance. Third, multivariate analysis was performed in terms of and the post-administration management.Fourth, multiple regression analysis was performed to identify the factors affecting the post-management of dentures and the period of using dentures.
Results: By results of the multiple regression analysis, the elder the subjects are( = 0.03), the lower their income activities are( = -0.18), the smaller their monthly allowances are( = -0.16), the worse their daily activity skills are( = -0.12), the more they were mounted their dentures by an unlicensed contractor( = 0.07), and the more they cost to their dentures( = 0.14), the longer the period of use dentures are. And the beneficiaries of Basic Livelihood Security( = -0.14) who got free denture business are shorten the period of using dentures. According to multiple regression analysis for post management of dentures, the independent variables like the health education(= 0.24), smoking( = -0.18), periodic oral examination( = 0.13), dentures mounted by an unlicensed contractor(= -0.13) are shown statistically significant results. In that study subjects are taking part in health education and non-smokers, they are likely to have more chances to post management for their dentures like periodic oral examination. However the subjects who were weared their denture by an unlicensed contractor get less chance to post management for their dentures.
Conclusion: As the elderly who want to wear denture are increasing due to the denture insurance for the elderly,the need for oral health education for the elderly is an urgent request, especially continuos education for the way of use their dentures and follow-up management for the elderly who were already mounted their dentures. And also,the need for more systematic researches is requested for securing objective data. | 치의학 | null | kci_detailed_000199.xml | |||
ART001729535 | oai_dc | 울산지역 치과기공사들의 직무스트레스 요인 평가 | Assessment of Job Stressors for Dental Technicians in Ulsan City | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"홍영호(대구가톨릭대학교); 최상준(대구카톨릭대학교); 김해경(대구카톨릭대학교); 황해영(대구카톨릭대학교)"
] | Purpose: This study is conducted to evaluate the job stressors for dental technicians in Ulsan city.
Methods: The Korean standard job stressors assessment tool developed by Korea Occupational Safety and Health Agency (KOSHA) was used to compare the survey result with Korean reference value. The questionnaire on the social, demographic and job characteristics of dental technicians was also used to find the factors affecting to job stressors by using multiple linear regression analysis.
Results: A total of 155 questionnaire was collected from 2010 to 2011. Among the eight fields of stressors, the physical environment (men 50.0, women; 58.3) and job demands (men 57.1, women 57.1) were higher than the median value of the Korean Workers. By multiple linear regression analysis, the significant factors to the physical environment were the satisfaction degree of indoor odor, number of employee, duty and working hours. In terms of the job demand, duty, working hours, age, and the satisfaction to the efficiency of space utilization were significantly associated to the score of job demand.
Conclusion: Based on these results, it is necessary to manage appropriate workload, control indoor odor and design an efficient work space for prevention of job stress of dental technicians. | 치의학 | null | kci_detailed_000200.xml | |||
ART001729506 | oai_dc | 원심 주조한 니켈-크롬 합금의 성량 변화 및 주조 온도에 따른 산화물 측정 | Composition of nickel-chromium alloy on the centrifugal casting and the influence of quantitative of oxides on the casting temperature | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김원수(대전보건대학교)"
] | Purpose: The aim of this study was to analysis the composition on the centrifugal casting and the oxide on the casting temperature.
Methods: The nickel based alloy were used in this study. Wax pattern specimens (10 10 2) were invested with phosphate-bonded investment in metal rings, the liquid/powder ratio and overall burn-out schedules for these investments were followed in accordance with the manufacturer’s instructions. After casting, the alloy specimens were evaluated as regards composition(EPMA). The casting temperatures were as follows: 1400 and 1700 . The quantitative analysis of oxides were scanning electron microscope(SEM), energy dispersive spectroscopy(EDS) and line scanning.
Results: Nearer the injection lines showed that there is a large amount of nickel. Quantitative of oxides of Ni-Cr alloy cast from 1400 is lager than Ni-Cr alloy cast from 1700Conclusion: Casting when using a centrifugal casting machine centrifugal force affects the composition of the alloy. The higher the temperature, the amount of oxide that is generated many. | 치의학 | null | kci_detailed_000200.xml | |||
ART001729502 | oai_dc | 베릴륨이 함유되지 않은 니켈-크롬 합금 코어와 코발트-크롬 합금 코어의 적합도 비교평가 | Comparison of the marginal and internal fit of cores fabricated by Ni-Cr alloy(non-beryllium) and Co-Cr alloy | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김기백(고려대학교); 김지환(고려대학교); 김재홍(고려대학교); 김웅철(고려대학교)"
] | Purpose: The aim of this study measured and compared the marginal and internal fit of metal cores with two base metal alloy (Ni-Cr alloy(non-beryllium), Co-Cr alloy).
Methods: Maxillary right first molar abutment fabricated by titanium was prepared for this study.
Impressions(10ea) were made from titanium model, and study models were poured with improved dental stone.
Wax cores of twenty were prepared for burn-out and casting. Ten wax cores cast Ni-Cr alloy(non-Be), and finally ten cast Co-Cr alloy. Marginal and internal fit of cores was evaluated using silicone replica technique and digital microscope(x160). The data were statistically analyzed with the independent samples t-test ( <.05).
Results: Mean(standard deviation, SD) marginal and internal fit total size of Ni-Cr alloy(non-Be) group was 73.3(14.4) and of Co-Cr alloy group 65.6(17.4) . The marginal and internal fit total size of Ni-Cr alloy group(non-Be) was statistically significantly greater than that of Co-Cr alloy group (P=.004).
Conclusion: Co-Cr alloy cores in this study had a better marginal fit than Ni-Cr alloy(non-Be) cores. | 치의학 | null | kci_detailed_000200.xml | |||
ART001729515 | oai_dc | 치과용 모형재 색상에 따른 디지털 모형의 체적 안정성 연구 | The study on the dimensional stability of digitized dental stone replicas according to difference color of gypsum materials | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최석순(신구대학교); 김재홍(고려대학교); 김기백(고려대학교); 이경탁(고려대학교); 전진훈(고려대학교)"
] | Purpose: The aim of study was to compare the dimensional stability of digitized dental stone replica using different color of gypsum materials using a white light scanner with three-dimensional software.
Methods: A master model(500B-1, Nissin dental product, Japan) with the prepared lower full arch tooth was used. Several type stones(white, yellow, green) were used for 30 stone casts(10 casts each) duplicated a master model of mandible. The master model and the replicas were digitized with the non-contacting white light scanner to create 3-dimensional digital models. The linear distance between the reference points were measured and analyzed on the Delcam Copycad (Delcam plc, UK) 3D graphic software. One-way analysis of variance(ANOVA)combined with a Tukey multiple-range test were used to analysis the data( =0.05).
Results: There were considerable differences in mean values between gypsum materials within each color(white,yellow, green), and this difference was statistically significant, p=0.001.
Conclusion: Digitization of dental materials on optical scanner was affected by color. Three different color of gypsum materials showed clinically acceptable accuracies of full arch digital model produced by them. Besides, these results will have to be confirmed in further clinical studies. | 치의학 | null | kci_detailed_000200.xml | |||
ART001729485 | oai_dc | 베릴륨 불포함 치과 주조용 니켈-크롬 합금 중 금속의치상용 합금과 금속소부도재관용 합금의 부식에 관한연구 | Corrosion of the non-beryllium dental casting Ni-Cr alloys for the denture base framework metal and the porcelain-fused-to-metal crown | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김홍식(김천대학교); 박수철(김천대학교); 송재상(김천대학교)"
] | Purpose: This study examined the corrosion level by alloy type and pH, and used the corrosion levels as the dental health data. The study utilized one Ni-Cr alloy for the full and removable partial denture metal frameworks and two Ni-Cr alloys for porcelain-fused-to-metal crown, among the non-beryllium dental casting non-precious Ni-Cr alloys.
Methods: The alloy specimens were manufactured in 10 and stored in the corrosive solution(pH 2.2-4.4) in the electrical water bath(37 ) for seven days. Afterwards, the metal ions were quantitatively analyzed using the ICP.
Results: Of the three metal alloys, Bellabond-Plus alloy and SOLIBOND N alloy, with 22% or higher chrome chemical contents, had higher corrosion resistance than Jdium-100 alloy with 20% chrome chemical content. In all three alloys, the corrosion of Ni was highest, and metal ion corrosion was higher in the pH 2.2 corrosive solution.
Conclusion: Although Ni-Cr alloy was not very corrosive, a Ni-allergic patient should not have Ni-Cr alloy prosthesis. The Ni-Cr alloy for porcelain-fused-to-metal crown should be designed for the dental porcelain to cover the whole crown. | 치의학 | null | kci_detailed_000200.xml | |||
ART001729539 | oai_dc | 치과기공사 실기시험 개선에 관한 조사 연구Ⅰ | The Study on the improvement of dental technician practical examination Ⅰ | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"배은정(고려대학교); 김지환(고려대학교); 김웅철(고려대학교); 정인성(부산가톨릭대학교); 남상용(대구보건대학교)"
] | Purpose: The purpose of this study is to investigate the improvement measure of dental technician practical examination.
Methods: A survey was performed on 111 dental technicians who were self-written questionnaire. The results were analyzed by SPSS 12.0. The collected data was analyzed by frequency and chi-square test.
Results: Questions most necessary work tools with the articulator was the highest with 55.9%, Electric wax carver(16.2%), heating clear(14.4%), CAD/CAM program(9.0%) was in the order. The need for additional practical test in response to actions included maxillary and mandibular comments occlusal work that you have to wax up the highest rate of 63.8%. Items most in need of improvement was strengthen of clinically oriented(48.0%),separation of written and practical(14.6%), control the degree of difficulty(11.4%) were the next order.
Conclusion: Based on the results of this study, the current dental technician did not show major problems in the practical test. However, clinicians should be strengthened mainly. To do this, the use of the articulator is essential. | 치의학 | null | kci_detailed_000200.xml | |||
ART001677184 | oai_dc | 치과용 지르코니아 코어 가공후의 잔여물을 활용하여 주입성형법으로 제조한 소결체의 특성 | The Properties of Sintered Body by Using the Slip Casting Process with Remained Dental Zirconia Block after Machining | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김상수(진주보건대학); 배원태(경상대학교); 이동윤(진주보건대학); 서정일(경상대학교)"
] | Purpose: All ceramic crown, made from zirconia instead of metal for core material, is recognized the best esthetical prosthesis. Recently, high-priced zirconia blocks and expensive CAD/CAM machines come into use for making zirconia core. In this study, slip casting process is adapted to evaluate the possibility of the recycling the remained parts of zirconia block after machining.
Methods: Remained zirconia blocks were reduced to powders with zirconia mortar, and screened with 180 mesh sieve. Passed powders were ball milled under various conditions to obtain the optimum zirconia slip for casting.
Solid casting method was used for casting the specimens with plaster mold. Formed specimens were dried and biscuit fired at 1,000 for 1 hour. Biscuit fired specimens were finished with exact shape of square pillar. Finished specimens were fired from 1,200 to 1,550 at 50 intervals for 1 hour. Linear shrinkage, apparent porosity,water absorption, bulk density, and flexural strength were tested. Microstructures were observed by SEM.
Results: Above examinations indicated that the optimum firing temperture was 1,500 , and when fired at this temperature for 1 hour, apparent porosity was 0% and flexural strength was 680 . SEM photomicrographs showed uniform 200~300 grain size, which is equal with microcture of sintered commercial zirconia block. when compare 24% linear shrinkage of cast specimen with 20% linear shrinkage of CAD/CAM machined block, it was estimated that the size controlling of cast core was not so difficult.
Conclusion: According to the all of this experimental results, the cast zirconia core produced from the remained parts of zirconia block was possible to use for all ceramic denture. | 치의학 | null | http://dx.doi.org/ | kci_detailed_000200.xml | ||
ART001677239 | oai_dc | 노인의 구강건강행위가 치주상태에 미치는 영향 - 2010년 국민건강영양조사를 이용하여 - | The Effects of oral health behaviors of elderly on periodontal status (From the 2010 Korean National Examination Health and Nutrition survey | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정효경(대구보건대학교); 곽동주(대구보건대학교)"
] | Purpose: The purpose of this study was to survey periodontal status using oral health index in the elderly population and determine methods for improving oral health status.
Methods: The date collected from ‘The fifth korean national health and nutrition examination survey 2010’ was analyzed in this study. Statistical analysis was done using the Statistical Package for Social Sciences version 19.0 for windows. We determined frequencies and percentage, calculating means, and standard deviations, and determining statistical significance using logistic regression analysis, multiple regression analysis.
Results: General characteristics showed differences in oral health behaviors associated with gender, age, residence,education. General characteristics showed differences in periodontal status associated with gender, family type,gender, residence, education. Oral health behaviors showed differences in periodontal status associated with using oral health care products, dental treatment.
Conclusion: In conclusion, in order to improve oral health of the elderly, the importance and needs of periodontal status should be emphasized. periodontal status related education for the elderly should be operated | 치의학 | null | http://dx.doi.org/ | kci_detailed_000200.xml | ||
ART001677244 | oai_dc | 노인의 구강위생행태와 주관적 구강건강 형태에 대한 분석 | Oral hygiene form and the subjective health analysis of the elderly | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김욱태(신흥대학교)"
] | Purpose: This study was conducted to prepare the fundamental data on oral hygiene of the elderly and to assess the behavior of oral hygiene, subjective oral health, oral health problem among the elderly, and to contribute to successful enhancement of life in their declining years.
Methods: The author surveyed the behavior of oral hygiene, subjective oral health, oral health problem to 192elderly at a health center of Busan using structured self- administered questionnaire from Nov. 2nd 2009 to Feb.
10th 2010. Collected data were analysed by SPSS WIN 18.0 statistical program for frequency, percentage production, 2 (Chi-square) verification, t-test, One-way ANOVA, Logistic Regression.
Results: The distribution of total subjects by oral health behaviors were 56.8% for “have ever trained how to tooth brushing”, 76.6% for “correctly performed tooth brushing by himself ”, 71.8% for “tooth brushing a day is two times and less”, 87.5% for “it doesn’t tooth brushing in meals and after” and 53.6% for “it doesn’t use the facility for oral health”, respectively. The distribution of total subjects by the state of perceived oral health were 51.0% for “feel the oral discomfort”, 51.6% for “feel the comfortable chewing on starchy food”, respectively. The mean point of perceived oral health by general characteristics of total subjects were statistically significant difference in sex, type of medical insurance, smoke, exercise, and chronic disease. The mean point of perceived oral health by oral health behaviors of total subjects were statistically significant difference in educational experience on tooth brushing,recognition for tooth brushing by himself, tooth brushing a day, and tongue cleaning. The risk factors of perceived oral health were type of medical insurance and chronic disease in general characteristics, tooth brushing in meals and after and tooth brushing a day, and tongue cleaning in oral health behaviors.
Conclusion: The author recommend to the prevention of chronic disease, carry out the tooth brushing in meals and after, three times and over tooth brushing a day and tongue cleaning for oral health. and the author consider that it need to prepare the active countermeasure to oral health such as reeducation for oral health and supply to the tongue cleaner | 치의학 | null | http://dx.doi.org/ | kci_detailed_000200.xml | ||
ART001677237 | oai_dc | 치과 주조용 Co.Cr-Mo alloy에서 전해용액 온도와 전해시간에 따른 전해연마의 특성 | Effect of polishing solution temperature and times by electro-polishing in dental casting Co-Cr-Mo alloy | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"장재영(진주보건대학); 송재상(김천대학교); 나정숙(진주보건대학교)"
] | Purpose: The purpose of this study was to investigate to effect of the electro-polishing condition according to electrolyte temperature and current and polishing time on surface morphology and composition by scanning electron microscopy(SEM) and energy dispersive X-ray spectrometer(EDS) in dental casting Co-Cr-Mo alloys.
Methods: 16 specimens were divided into 4 groups which have each 4 specimens. The size of specimens were 10wide and 5 height. the electro-polishing of specimens are by polishing solution temperature and times in Co-Cr-Mo alloy by SEM and EDS analysis.
Results: The results shows that most smooth surface is obtained when electro-polishing is performed at 49 for 30-40sec with electro gap of 10mm and 8 voltage.
Conclusion: The morphologies of specimens after electro-polishing were scratch absent and significant between at 40 for 45sec and at 49 for 45sec. | 치의학 | null | http://dx.doi.org/ | kci_detailed_000200.xml | ||
ART001677206 | oai_dc | CAD/CAM 및 카피밀링 시스템을 이용하여 제작한 구치부 3-유닛 고정성 국소의치의 파절강도 | Fracture Strength of All-Ceramic 3-Unit Fixed Partial Dentures Manufactured by CAD/CAM and Copy-Milling Systems | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강후원(동아인재대학교); 김희진(부산카톨릭대학교); 김장주(광양보건대학교); 고명원(광양보건대학교)"
] | Purpose: Fracture strength of all-ceramic 3-unit fixed partial dentures manufactured by CAD/CAM and copymilling systems were evaluated.
Methods: Zirconia cores were made by milling the pre-sintered zirconia block by CAD/CAM or copy milling method followed by subsequent sintering. By building-up the corresponding porcelains on the core, all-ceramic bridges were fabricated, and those were evaluated in comparison with PFM fixed partial denture.
Results: During the flexural test of the 3-unit PFM bridge, the porcelain started to chip or break at 507.28(62.82)kgf and the metal framework did not break until the maximum load level of 800kgf which was set in the testing instrument of this study. However, among all-ceramic restoration test groups, Everest(EV) group showed a peeling off or breakage of the porcelain from 365.64( 64.96)kgf and the core was broken at 491.77( 55.62)kgf.
Those values of Zirkonzahn(ZR) were 431.03( 58.47)kgf and 602.74( 48.44)kgf, respectively. The break strength of the porcelain of PFM(PM) group was significantly higher than that of EV (p<0.05) group and there was no significant difference when comparing to that of ZR (p>0.05). ZR group showed higher break strength than that of EV group however there was no significant difference (p>0.05). The break strength of cores were in the increasing order of EV < ZR < PM (p<0.05).
Conclusion: We could find that even though the PM group fractured at much higher value than all-ceramic cores,the breakage values of the porcelain of PM group with crack formation or delamination, which will be regarded as clinical failure, was significantly higher than that of EV group and not significantly higher than that of ZR group at p-values of 0.05. The break strength of ZR group was higher than that of EV group at an insignificant level(p>0.05). | 치의학 | null | http://dx.doi.org/ | kci_detailed_000200.xml | ||
ART001677235 | oai_dc | 코핑 두께의 차이에 따른 POM 보철물의 변연적합도 연구 | Comparison of the marginal fit of POM restorations with different thickness of metal copings | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"임형택(한양대학교병원 치과기공실)"
] | Purpose: The purpose of this in vitro study was to compare the marginal fit of POM restorations with 3 different thickness of metal coping.
Methods: 2.0 Occlusal reduction, 1.0mm preparation of axial wall with 6degree taper, and chamfer margin was prepared a maxillary first premolar on dentiform. Duplicate prepared die and, make 30 individual dies with Ni-Cr metal. Make 3 groups of 30 press ceramic on Metal crown with different thickness of metal coping; 10 of 0.1 , 10of 0.3 , 10 of 0.5 thickness metal coping. The marginal fit of the crowns was evaluated 50 points per 1 crown,around the crown margin circumference under a optical microscope at original magnification 100. A 1-way analysis of variance (ANOVA) was used to compare data.
Results: The mean marginal discrepancy for POM with 0.1 metal copings was 72.56 , 67.83 for 0.3metal coping POMs, and 72.56 for 0.5mm metal coping POM.
The 1-way ANOVA showed significant difference among 3 groups.
Conclusion: The marginal fit of pressed-on-metal (POMs) was best with 0.3 thickness of metal coping,fallowing by 0.1 , and 0.5 in the order. | 치의학 | null | http://dx.doi.org/ | kci_detailed_000200.xml | ||
ART001677220 | oai_dc | 주입성형한 지르코니아 소결체의 기계적 성질에 미치는 알루미나 첨가의 영향 | Effects of the Addition of Alumina on the Mechanical Properties of Cast Zirconia Sintered Body | {
"journal_name": "대한치과기공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이동윤(진주보건대학); 배원태(경상대학교); 조준호(진주보건대학); 서정일(진주보건대학교)"
] | Purpose: Zirconia blocks for all ceramic dentures are divided into two groups. One is pre-heated block and the other is binder added block. In this study, the possibility of recycling the remained parts of binder added block after CAD/CAM machining with slip casting process was investigated.
Methods: Owing to the binder added block contain large amount of organic matter, Binder burn-out was must be carried out before ball milling for preparing the casting slip. Binder burn-out was accomplished at 600 for 10hours. Ball milling was performed with 5 zirconia ball and 60 polyethylene bottle. From 0% to 5% at 1%intervals of alumina was added to zirconia powder for preparing slip. Solid casting was achieved with plaster mold.
Cast bodies were dried and sintered at 1,500 for 1 hour. Linear shrinkage, apparent porosity, water absorption,bulk density, and flexural strength were tested. Microstructures were observed by SEM, EDS and XRD analysis were executed.
Results: Optimum slips for casting was prepared with 300g ball, 100g powder, and 180g distilled water. Cast body without alumina showed 26% of linear shrinkage, 6.07 of apparent density, and 470 of three point bend strength. On the other hand, as received zirconia block, which was sintered at the same conditions, showed 23% of linear shrinkage, 6.10 of apparent density, and 680 of three point bend strength. When 3% of alumina was added to zirconia, sintered body showed 23% of linear shrinkage, 6.10 of apparent density, and 780 of three point bend strength. SEM photomicrographs and EDS analysis showed alumina particles uniformly dispersed in zirconia matrix, and XRD analysis showed no phase transformation of tetragonal zirconia particles was occurred when alumina was added.
Conclusion: According to the all of this experimental results, 3% of alumina added cast zirconia body showed excellent mechanical properties more than as received binder containing zirconia block | 치의학 | null | http://dx.doi.org/ | kci_detailed_000200.xml |
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