• Nuclear Engineering and Technology
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• v.48 no.3
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• pp.799-804
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• 2016

A miniature X-ray tube based on a carbon-nanotube electron emitter has been employed for the application to a dental radiography. The miniature X-ray tube has an outer diameter of 7 mm and a length of 47 mm. The miniature X-ray tube is operated in a negative high-voltage mode in which the X-ray target is electrically grounded. In addition, X-rays are generated only to the teeth directions using a collimator while X-rays generated to other directions are shielded. Hence, the X-ray tube can be safely inserted into a human mouth. Using the intra-oral X-ray tube, a dental radiography is demonstrated where the positions of an X-ray source and a sensor are reversed compared with a conventional dental radiography system. X-ray images of five neighboring teeth are obtained and, furthermore, both left and right molar images are achieved by a single X-ray shot of the miniature X-ray tube.

• Journal of Technologic Dentistry
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• v.41 no.3
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• pp.221-232
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• 2019

Purpose: This experiment aims to provide the fundamental resources in developing a programme intended to prevent students from dropping out of their academics by promoting students to develop an optimistic psychological state, through analysis of the factors that influence students' commitment to their major. Methods: A self-administered questionnaire was conducted from $19^{th}$ of November of the year 2018, till $1^{st}$ of December of the same year, with dental technology students located in W city as the subject. 261(93.2%) of the participants' responses were used for the final analysis. Results: A negative association between factors of commitment to major and factors of academic dropout decision were portrayed to be of statistical significance (p<.01), and factors of commitment to major that influence dropping out of their academics were shown to be that of 'autotelic experience' (p<.001) with a negative ( - ) relationship, and 'change in a sense of time' (p<.01) with a positive ( + ) relationship of statistical significance, while the explanatory power of the model was shown to be 33.6%. Conclusion: In order to prevent dental technology students from dropping out of their academics, following their entrance, To achieve this, the department must consider the implementation of, aside from subject matters of the major, other various extra-curricular programmes, and programmes in which the supervisor is consistently providing consultations that are tailored to each individual student.

• Journal of Korean society of Dental Hygiene
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• v.14 no.6
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• pp.961-966
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• 2014

Objectives: The purpose of the study was to investigate the classes of humanities and social sciences in the public health curricula. Methods: Data were collected through online received from 329 public health curricula from July to August, 2014. Categorized are introduction, management of hospital, medical health law, and ethics, patient psychology, others(communication, behavioral science, administration). The data were analyzed by a descriptive analyses and ${\chi}^2$-test(SPSS 12.0). Results: As a result of evaluate the classes of humanities and social sciences in the public health curriculum, 86.0% of department of occupational therapy, 71.4% of department of radiological technology and 72.6% of department of dental hygiene established more 4 classes. 92.1% of department physical therapy and 64.9% of department medical technology established more 5 credits. Numbers and credits of courses showed no differences by educational system. Conclusions: Humanities and social sciences are not popularly introduced in the most departments of public health sciences. Humanities and social sciences are very important and necessary for training competent future professionals in the public health sciences. So this study will provide the basic data for the introduction of humanities and social sciences in the public health curricula.

• Journal of Technologic Dentistry
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• v.38 no.4
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• pp.353-363
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• 2016

Purpose: This study aims to assess clinical practice satisfaction among dental technology students and to identify the factors that may influence their career decision levels. In doing so, the present study provides preliminary data as to ways to improve clinical practice satisfaction levels and career decision levels that would be optimal for one's competence. Methods: he survey was conducted on dental technology students. The collected data was analyzed by the statistical program SPSS 21.0. The results were analyzed by reliability, frequency, multiple-way ANOVA, correlation, multiple regression. To test for significance on each item, p<0.05 has been decided as a standard. Results: Analysis results indicate that the factors influencing clinical practice satisfaction of dental technology students include school year, satisfaction of major, area of clinical practice, and assigned department for clinical practice, while the factors that influence career decision levels include satisfaction of major and clinical practice satisfaction. Conclusion: Results of present study suggest that in order to improve clinical practice satisfaction among dental technology students and thereby career decision levels, one needs to focus on satisfaction of major and quality of clinical practice. Such efforts will enable a more active and effective approach toward clinical practice for the dental technology students, and with appropriate understanding and assessment of the experience, they will be better equipped to make a career decision where they can live up to their competence.

• Journal of Korean society of Dental Hygiene
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• v.19 no.4
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• pp.449-465
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• 2019

Xylitol is a sweetening agent used to prevent dental caries. It is formulated and consumed in various forms, and its use is recommended in particular for oral health. However, dental specialists are not familiar with xylitol or well-acquainted with the appropriate method to use it. Furthermore, the caries-prevention effect of xylitol has been controversial. Thus, in this study, we aimed to analyze previously published studies on the dental caries prevention effect of xylitol to verify its true effects and establish an appropriate method to use it. We analyzed 94 clinical research manuscripts obtained from domestic and international online databases and found that although 11 manuscripts reported no significant dental caries prevention effect of xylitol, most manuscripts reported dental caries prevention with xylitol. Compared to the manuscripts that reported dental caries prevention with xylitol, those are assessed lower amounts of xylitol or shorted consumption periods, and had dosage form that could not retain xylitol sufficiently long in the mouth, similar to milk. Thus, consumption of 5-11 g of xylitol in the form of gums, candies, or tablets over a long time period could effectively reduce the risk of dental caries. It has the advantage of ease of consumption, regardless of the gender, age, or disability of the person.

• Journal of Technologic Dentistry
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• v.41 no.2
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• pp.113-122
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• 2019

Purpose: This study analyzed the difference in participation motive, expectation for educational institution and educational satisfaction depending on participation level of students of advanced course for bachelor of dental technology. Methods: 81 students of advanced course for bachelor of dental technology from four university were selected by convenience sampling method. To analyzed influence of participation level depending on participation motive, expectation for educational institution and educational satisfaction, regression analysis was carried out. Results: The participation level of the students was found to be influenced by the educational satisfaction, participation motive and expectation for educational institution. Conclusion: Based on the results, it is important to understand the participation motive of the students and to offer satisfaction environment and administrative support for enhancing the expectation for education for educational institution.

• Journal of Korean society of Dental Hygiene
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• v.19 no.1
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• pp.19-31
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• 2019

Objectives: The aim of this study was to propose a standardized guideline for clinical training courses among dental hygiene departments of colleges in Korea. This study comparatively evaluated periods and durations of the curricula and specific domains, credits and hours of clinical training classes, and institutions providing practical lessons, and calculated the total credits and hours. Methods: From August 15 to September 15, 2017, a literature review was conducted in dental hygiene departments of 82 schools around the country in order to investigate the current conditions of clinical training in each educational system. Furthermore, 5 colleges were selected from each type of educational system, and their credits and hours for clinical training were analyzed in subjects of practical training for clinical dental hygiene, practical training for dental clinic, practical training for local community dental health, clinical training, and pre-clinical level practical training. The total credits and hours were calculated on the basis of analysis results. Results: The findings revealed that the hours of clinical training classes and hours per credit for practical training in the dental hygiene departments as well as the practical training institutions varied between the colleges. In some cases, the hours of practical training were not indicated. Standardized clinical training in the dental hygiene department was allotted 675 hours, whereas practical training in local community dental health studies was allotted 105 hours, which totaled to 780 allotted hours. Conclusions: There was a significant difference among the colleges in terms of the current conditions of clinical training in the dental hygiene department. The literature review revealed that a total of 780 hours was allotted to clinical training, and this was significantly more than the standard (500 hours) set by the. Moreover, these clinical training hours were lower than in advanced countries or other health and medical treatment occupations. Therefore, efficient improvement is required in order to provide a timely guideline for clinical training.

• Journal of Technologic Dentistry
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• v.38 no.4
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• pp.327-342
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• 2016

Purpose: The purpose of this study was to investigate the cognition of denture fabrication activities and its cost in National Health Insurance for elderly denture. Methods: A self-administered questionnaire was completed by 41 dental laboratories' owner who was research subjects of HIRA(Health Insurance Review & Assessment Service)'s policy research for elderly denture in 2011. The questionnaire consisted of general characteristics of the subjects, dental technicians' knowledge of national health insurance coverage of elderly denture, job-related changes after national health insurance coverage of elderly denture including validity of denture fabrication activity classification and the cost for each service. Each question was measured by Likert 5 point scale or frequency. The collected data were analyzed by SPSS 16.0. Results: Most of the research subjects had been fabricating national health insurance coverage denture(92.7%), also had ample knowledge of national health insurance coverage denture for elderly. Job-related changes after national health insurance coverage of elderly denture revealed marginal differences in the quality. The validity of fabrication activity classification of resin based complete denture was $3.71{\pm}1.023$ by Likert 5 point scale. Conclusion: The goal of national health insurance for elderly denture is to promote elderly's health and well-being. To fabricate denture is a very important part of the denture treatment. For this reason, denture fabrication activity classification and the cost analysis plan should be duly reflected in the policy of national health insurance for elderly denture.

• Journal of Korean Academy of Dental Administration
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• v.6 no.1
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• pp.43-47
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• 2018

Online data can be explored for topics browsed by an unspecified population to detect professional information demands more quickly. The purpose of this study was to collect and analyze online questionnaires in order to find information required by dental hygienists. We analyzed the frequency of posting words after isolating nouns from questions of the Korean Dental Hygienists Association homepage's Q & A section, the Naver Knowledge-iN service, and a dental hygienists' online meeting site in Naver. We found that queries of the Korean Dental Hygienists Association's homepage were concentrated on education renewal and license notification. The queries about dental hygienists in the Naver Knowledge-iN service used words related to job or career choice, and the queries of the dental hygienist-affiliated site had many words related to dental practice, dental work, and turnover. This study showed that the information needs of unspecified dental hygienists varied depending on the online environment such as homepage, blog, and information service.

• Journal of Technologic Dentistry
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• v.42 no.3
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• pp.197-201
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• 2020

Purpose: This study aimed to assess the quality of dental prostheses printed by digital light-processing (DLP) technology. Methods: Ten experimental models were prepared. The ten specimens that were printed by DLP technology constituted the DLP group. The ten specimens that were produced in the same model by the casting method constituted the control group. The marginal gaps of the 20 specimens produced were measured. These gaps were measured by a silicon replica technique at two abutments of the specimen. Therefore, 20 marginal gaps were measured in each group. An independent sample t-test was performed to compare the marginal gaps measured in the two groups (α=0.05). Results: According to the results of the measurement, there was a significant difference between the mean marginal gap of the control group (78.8 ㎛) and that of the DLP group (91.5 ㎛), p<0.001. Conclusion: Although the mean marginal gaps of dental fixed prostheses produced by the DLP method was higher than the mean marginal gap of those produced by the casting method, it was considered to be within the clinical threshold value suggested by some previous studies.