• 대한치과기공학회지
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• 제34권2호
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• pp.121-128
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• 2012

Purpose: The aim of this study was to determine the reliability and accuracy of measurements in digital models(CEREC$^{(R)}$ AC) compared to stone models. Methods: A master model(500B-1, Nissin Dental Product, Japan) with the prepared upper full arch tooth was used. Conventional impression and then stone model(n=10) were produced from this master model, and on the other hands, digital impressions were made with the CEREC$^{(R)}$ AC intra-oral scanner(n=10). One examiner measured two times the intercanine, intermolar distance, dental arch length. The stone model were measured using a digital caliper. The t-student test for paired samples and intraclass correlation coefficient(ICC) were used for statistical analysis. Results: The measurement of two methods showed very good reliability. At the intra-examiner reliability of measurement, ICC at the stone and CEREC$^{(R)}$ AC model were 0.81 and 0.94. The mean difference between measurements made directly on the stone models and those made on the CEREC$^{(R)}$ AC model was 0.20~0.28mm, and was statistically significant(P=0.001). Conclusion: These in vitro studies show that accuracy of the digital impression is similar to that of the conventional impression. These results will have to be confirmed in further clinical studies.

• 대한치과기공학회지
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• 제20권1호
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• pp.27-35
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• 1998

There is not yet 4 years college education coursed for producing dental technicians in Korea. At present only 3 years college courses are provided for producing dental technicians. This is undesirable in that lots of professional vacations have been more and more speciallized by establishing 4 years college courses. To improve and elevate the ability of dental technicians. the establishment of more advanced educational courses, for example promoting present 3 years college courses to 4 years college courses, is urgently needed. This necessity become more evident when we take into account the ever increasing social demand for dental technicians.

• 한국치위생학회지
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• 제11권2호
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• pp.149-158
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• 2011

Objectives : The objective of this study was to analyze cognition and status of oral health education of dental hygienists who manage the patients visiting dental clinics and to utilize the findings as continuous study data required for development of systematic oral health education program for management of peridontal disease of adults. Methods : Survey was carried out for 261 dental hygienists working in dental clinics who are performing oral health education of patients with peridontal disease living. Results : 1. In the socio-dynamic diagnosis, it was analyzed that, the younger the age is and the lower the career is, the more the work is centered around assisting medical treatment job and, the older the age is and the higher the career is, the work is centered around oral health education job. 2. In the behavioral diagnosis, it was analyzed that, as to source of knowledge acquisition, guide of dentists and senior dental hygienists was the highest and, as to education media, visual education and demonstration education were mainly used. 3. In educational diagnosis, as to the degree of knowledge about oral health education and the degree of practice, it showed that the degree of knowledge was lower than the degree of practice in peridontal disease process and oral prophylaxis as well as scaling part. 4. In both the cases of independent practice and group practice, it showed that the most frequent obstacle was insufficient educational materials and tools and it was analyzed that acquisition of new knowledge and technology is required as a matter to be improved. Conclusions : It seems to be required for the dental hygienists to develop detailed knowledge and professional technology in order to induce actions and motive of patients during oral health education of peridontal patients and to develop and produce data for efficient education of peridontal patients.

• 대한치과기공학회지
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• 제19권1호
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• pp.63-89
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• 1997

This survey aimed at the analysis of the consciousness of the dental technicians on the college education ; 205 dental technicians who graduated the relavant school answered. Following is the result of the analysis with its ststistcal number. 1. About the time when they chose their major, 84 people(41.1%) answered the prepartion period for the college. And, 74(36.1%) said that they applied on their own thought to their major. The reason why they chose it was first the prosperity expected in the near future, 93(45.4%) replied. 2. 161(78.5%) were satisfied with their college days. On the other hand, the most regretful one those days, 69(33.7%) answered, was the scarcity of the study seminar. 3. About the exercise courses, 120(58.6%) showed dissatisfaction, and 66(32.3%) people of the dissatisfied pointed out the lack of the instruments. 4. The suitable number in a class, 124(60.5%) supported, is 20 heads. The appropriate period of education was said three years by 71(34.6%), four years 53(25.9%) and the extension to the graduate school by 41(20.0%) 5. About the tips for the professors, 147(71.7%) proposed they would research and lecture further more. To the college administration, 116(56.5%) suggested it should accomo-data enough instruments for practicing.

• 대한치과기공학회지
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• 제20권1호
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• pp.99-120
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• 1998

The objective of this study is to research the job spirits of Korea Dental Technisians, Then to figure out the reality of Dental Laboratory Technology field. So to provide data for improving the working condition in which they can with the proper value and pride and be of help in the development of Dental Laboratory Technology field. 1. Before entering school, 121(59.1%) scarcely knew about Dental Technisians, which show its perception is fairly low. The reason for choosing their job, 93(45.4%) answered the most it has a rosy future. 2. About the job satsfaction, 77.5% was satisfied counting the "so-so"s as contentment. About the channel for getting their jobs, 81(39.5%) the most made it through their own efforts. 3. The most influential factor when choosing their jobs, character and aptitude is answered the most by 115(56.1%). The working period they want is the time when they can't work for health problem, 76(37.1%) answered. 4. The most favored job condition of Dental Technitians is opening their own office(69, 33.7% and the most favored work is dental ceramics 62.9%, 129) 5. About their desires on changing jobs, about 52.2% was considering it and the reason for it they are treated improperly in spite of their academic background.(57.1%, 117ppl) 6. About the events for improvement of their job knowledge, 75(36.6%) answered participation in seminars. For the present, the most interesting part is to take new skills via the seminars(33.7%, 69ppl) 7. On the future of the Dental Laboratory Technology field, 80.4% said would be better. On the claims for the Dental Laborotory Technology Association, 152(74.1%) said they wanted their reights and interests protected.

• 대한치과기공학회지
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• 제29권2호
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• pp.129-140
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• 2007

The purpose of this study was to evaluate the titanium castability (internal porosity) between pressure type casting machine & centrifugal casting machine with air-vent or not. Internal porosity is a well-known problem in dental titanium casting, resulting in inferior mechanical properties of dental restorations. To evaluate the castability, the square plate was chosen. 40 plate patterns($20{\times}20{\times}1.8mm$)were attached to funnel-shaped sprue. Then 20 plate patterns were attached air-vent. They were invested in titanium investment material and cast in a pressure type casting machine(20castings) and centrifugal casting machine(20castings). Each group were divided with air-vent(10castings) or not(10castings). The titanium castings were evaluated by radiographic photograph for the location of the internal porosities. The percentage porosity of each specimen was determined using standardized digital radiographs. The results were analyzed with analysis of variance and t-test for paired comparison between two groups.

• 대한통합의학회지
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• 제8권4호
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• pp.93-106
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• 2020

Purpose : This study examines dental hygienists' emotional labor, job satisfaction, and turnover intention and defines how this emotional labor affects job satisfaction and turnover intention in hospitals. Methods : Among the dental hygienists currently working for the dental department in hospitals and clinics located in Busan, South Korea, 216 dental hygienists who understood the purpose of this research and agreed to participate were instructed to answer a self-administered questionnaire from April 1 to April 30, 2019. A statistical analysis was subsequently conducted on the responses using the SPSS Win 23.0 program. Results : Emotional labor and job satisfaction showed a negative relationship; thus, as emotional labor was low, job satisfaction was high. Moreover, emotional labor and turnover intention were found to be positively correlated, while job satisfaction and turnover intention were shown to be negatively related (p<0.01). Conclusion : The present study demonstrated that the emotional labor of dental hygienists affects job satisfaction and turnover intention. The results suggests that through systematic organization and human resource management, hospitals should design and implement in practice programs to increase dental hygienists' job satisfaction. In addition, these hospitals should secure compensation systems that are motivating enough to enhance the severe emotional labor of dental hygienists to decrease turnover intention. As another method to lower turnover intention, dental hygienists may attempt to resolve emotional disharmony with their own problem-solving methods; however, it is necessary to develop and support organizational culture for the improvement of their working environment.

• 대한치과기공학회지
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• 제23권1호
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• pp.107-114
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• 2001

R.P.D fabrication can be made if the skills already is properly used in the manufacturing press. You may feel extremely comfortable to wear it. The material used has high elasticity that it can endure the hole process of Acetal Wax pattern casting without any deformation moreover its adaptability is not bad. Because of the poor financial condition of patterns and health insurance, Acetal R.P.D Framework can be one of the best alternatives used for setting clasp partial denture cheaply. R.P.D Framework is aesthetically excellent. The color caused by saliva is so similar to that of the rest of teeth that even dentists as well as patients can not recognize clasp arm. Clasp also helps to secure prosthesis ideally without damaging teeth due to its deep position downward. Since dentists and patients have a good reaction to clasp so far, we are encouraged to apply it to other technical fields.

• 대한치과기공학회지
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• 제13권1호
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• pp.9-13
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• 1991

The purpose of this study was to determine the marginal fit of recasting by used nickel-chromium metal alloys, Hi-Crown, New-Crown and CB-80. Ninety crown prosthetics were divided into eighteen groups according to new to old metal ratios. Each crown was seated on its master die and then the marginal gaps were measured under optical microscope($\times$50). All groups were showed good marginal fit, except group 3 of Hi-Crown(156$\mu$m). The results suggest that the marginal fit of Ni-Cr metal alloy casting bodies were good as without concerned to mixed ratios and metals.

• 대한치과기공학회지
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• 제5권1호
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• pp.5-11
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• 1983

In order to ascertain the aspects of the dental technicians training system which require improvement, and also to provide important data for use in setting up dental technicians manpower planning, our country's dental technicians training and employment status has been studied and analyzed. The objects of the survey are 1896896 dental and Social Affairs from 1965 to 1982. The results were as follows; 1. Education organs for dental technicians are education system such as health junior college and service training systems. About 965 dental technicians have come from the service training systems and 931 technicians have come from health junior college in our country. 2. Total number of employment of dental technicians employed in our country are 820, and 292 of them are engaged in Seoul, So unbalanced employment of dental technicians will be troubled in a future. 3. All registrated to government are 1,896 till 1982 and 820 of them engaged are that is, we can suppose about employment of dental technicians in a future, 3,746 dental technicians will registrate to Health and Social Administration an 1992, and 1,482 of them will be able to take their job in Korea.