• The Journal of the Korean dental association
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• v.50 no.9
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• pp.558-565
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• 2012

Dental caries is multifactorial local disease which involves destruction of the hard tissues of the teeth by metabolities produces by microorganisms. Recently, there has been growing interest in the role of nitric oxide (NO) and glutathione (GSH) in caries incidence. The aim of the study was to survey the studies reported the association among salivary NO, GSH and dental careis. Three studies reported the association between NO and dental caries. However, the results were contradictory. Only one study showed negative association between GSH and dental caries. In Korea, NO showed negative association with Lactobacilli and GSH showed positive association with dental caries. These observations suggest the possibility that NO and GSH could be new biomarkers for dental caries. However, further study should be needed.

• Journal of Technologic Dentistry
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• v.29 no.2
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• pp.105-117
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• 2007

As a dental technician, the aim of the present study on maxillofacial prosthesis was to research its relation with dental technology and further development aspects by looking into its history, kinds, production materials and process. Dental technicians are to expect a great potential to work as maxillofacial prosthetist if having an interest in education of maxillofacial prosthesis field, and developing and operating the education process by expanding the range of dental technology. This article is to present overall history of maxillofacial prosthesis and some background information on the materials which have been used from the past. The maxillofacial field plays essential functions of mastication and speech, as well as performs appearance, which evokes good or bad feelings as an instant and instinctive response. The use of maxillofacial prostheses is not merely the replacement of a missing part of the face, resulted from injuries, but a rehabilitation process to help individuals come back to society. Rehabilitation includes both patient's physical and psychological recovery, such as self-esteem and selfconfidence. There has been a rapid development in application potentials of maxillofacial prosthesis technology which include implant, which can penetrate skin, and new materials. In order to produce maxillofacial prosthesis, general procedures of maxillofacial laboratory work should be understood first. Maxillofacial prosthesis and the dental prosthesis have many similarities in its academic perspective and originality. Maxillofacial prosthesis should be added into the curriculum for dental technology to achieve co-enhancement of the two fields.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.8
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• pp.1424-1429
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• 2016

Segmentation is one of the first steps in most diagnosis systems for characterization of dental caries in an early stage. The purpose of automatic dental cavity detection system is helping dentist to make more precise diagnosis. We proposed the semi-automatic method for the segmentation of dental caries on digital x-ray images. Based on a manually and roughly selected ROI (Region of Interest), it calculated the contour for the dental cavity. A snake algorithm which is one of active contour models repetitively refined the initial contour and self-examination and correction on the segmentation result. Seven phantom tooth from incisor to molar were made for the evaluation of the developed algorithm. They contained a different form of cavities and each phantom tooth has two dental cavities. From 14 dental cavities, twelve cavities were accurately detected including small cavities. And two cavities were segmented partly. It demonstrates the practical feasibility of the dental lesion detection using Computer-aided Detection (CADe).

• Journal of Korean society of Dental Hygiene
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• v.11 no.4
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• pp.453-464
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• 2011

Objectives : The purpose of the study is to gain some basic material for the improvement of dental clinics' homepages through a survey investigation, in which college students of Dental Hygiene Departments and Dental Hygienists in Kwangju and Cheollanamdo Province Methods : It conducted the self-reported questionnaire survey on the Recognition Degrees of the Dental Clinics' Homepages from May 26, 2010 to October 19 targeting 240 dental hygienists who are working for dental offices and 638 college students of Dental Hygiene Departments. Results : 1. It was asked whether they have visited dental homepages for the recent one year; 'yes' answers occupied 68.1%, double than 'no' answers. 2. It was asked how much they know services provided in dental homepages; The more respondents correctly answered that there exist all these services like general information service, visitor's book and bulletin board service, reservation service, dental information service, counseling service, and visual service. 3. All the respondents answered that the homepage of each dental clinic is closely related with the image of the clinic : freshmen showed 3.84, sophomore showed 4.03, juniors showed 4.03, and dental hygienists showed 3.88. 4. It was asked how much they know services provided in dental homepages; Are there the homepages for dental hygienists? Many of them answered that IT experts or businesses are managing the homepages in the technical respect(38.4%) and their use and general administration mainly belongs to dental hygienists(46.2%). Conclusions : It is necessary that through the studies of dental hygienists' interest and understanding on dental homepages we have to seek the development orientation of the technical management and the way of using them, and furthermore we have to know the thoughts of patients on dental homepages, who are users of the dental informations, and find the ways of improving medical services which the patients want.

• The Journal of Advanced Prosthodontics
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• v.6 no.2
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• pp.138-145
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• 2014

Cobalt-Chromium (Co-Cr) alloys are classified as predominantly base-metal alloys and are widely known for their biomedical applications in the orthopedic and dental fields. In dentistry, Co-Cr alloys are commonly used for the fabrication of metallic frameworks of removable partial dentures and recently have been used as metallic substructures for the fabrication of porcelain-fused-to-metal restorations and implant frameworks. The increased worldwide interest in utilizing Co-Cr alloys for dental applications is related to their low cost and adequate physico-mechanical properties. Additionally, among base-metal alloys, Co-Cr alloys are used more frequently in many countries to replace Nickel-Chromium (Ni-Cr) alloys. This is mainly due to the increased concern regarding the toxic effects of Ni on the human body when alloys containing Ni are exposed to the oral cavity. This review article describes dental applications, metallurgical characterization, and physico-mechanical properties of Co-Cr alloys and also addresses their clinical and laboratory behavior in relation to those properties.

• Journal of Technologic Dentistry
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• v.32 no.3
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• pp.233-240
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• 2010

Objective: The purpose of this study was to research of investigation of dental technology students about health educator systems. Methods: A survey was performed on 102 subjects in March in 2010. There search tool was a structured questionnaire. The collected data was analyzed by frequency, descriptive, chi-square test and Pearson's correlation coefficient by Statistical Package for the Social Sciences version 12.0. Results: Respondent most did not know about health educator systems. But, positive opinion for it. And necessity about education appeared high in subjects. There are a lot of interests in health educator system(p=0.000). Conclusion: We thought that interest of dental technology student's rise more.

• Journal of Korean Academy of Oral Health
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• v.42 no.4
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• pp.181-186
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• 2018

Objectives: The purpose of this study was to investigate influences on employment preparation in dental hygiene students. Methods: A self-reported questionnaire was completed by 386 dental hygiene students in South Korea from November 1 to 30, 2016. For data analysis, the study used independent t-tests, one-way analysis of variance, Pearson correlation analysis, and regression analysis among others. Results: Students with higher grades tended to have major satisfaction, instruction participation, and employment preparation (P<0.001). Higher parental monthly income was related to higher major satisfaction (P<0.001). Employment preparation was significantly positively related to major selection motive, major satisfaction, and instruction participation. Conclusions: In order to encourage dental hygiene students to prepare for employment, it is necessary to create a better academic environment and develop a variety of employment preparation education programs. I think that the active interest of the country, society, school, and family will have a positive impact on employment preparation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.4896-4906
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• 2010

This study was conducted in order to promote students' interest in overseas employment and to present methods of improving education that suits globalization and internalization. From responses to individual written survey questionnaires answered by $3^{rd}$grade 200 students who are studying dental hygiene at colleges in Daegu. They had most interested in Japan (60.3%), and they want to work abroad if they are given the changes (38.1%), which indicate that the dental hygiene majors have much interest and positive attitude in overseas employment. In Japan, there are 158 schools had department of dental hygiene (51 to 2 years, 101 to 3 years, 6 to 4 years). Especially, Kanto area has 25 private schools. When compared Korea and Japan, they similar were curriculum, 39 at 3 years, 44 at 4 years, respectively. The current national board dental hygiene examination system was 200 in total score, and 19 in total subjects. The 9 basic clinical courses including oral anatomy have 100 scores, and the 8 subjects including preclinical course have 50 scores, one dental assistant course have 50 scores. In Japan, 4 years pre-dental hygiene curriculum content provide certificate of dental hygiene after graduation. They provide additionally 'social worker' in Tokyo University, 'teacher in nursing' in Hirosima University. They scheduled the various foundational knowledge and skill such as competencies to communicate effectively, to participate community health program, and to make decisions regarding dental hygiene service.

• Restorative Dentistry and Endodontics
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• v.38 no.3
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• pp.105-112
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• 2013

While it is reasonably well known that certain dental procedures increase the temperature of the tooth's surface, of greater interest is their potential damaging effect on the pulp and tooth-supporting tissues. Previous studies have investigated the responses of the pulp, periodontal ligament, and alveolar bone to thermal irritation and the temperature at which thermal damage is initiated. There are also many in vitro studies that have measured the temperature increase of the pulp and tooth-supporting tissues during restorative and endodontic procedures. This review article provides an overview of studies measuring temperature increases in tooth structures during several restorative and endodontic procedures, and proposes clinical guidelines for reducing potential thermal hazards to the pulp and supporting tissues.

• Journal of Korean society of Dental Hygiene
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• v.12 no.6
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• pp.1071-1081
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• 2012

Objectives : This study were to find out differences in mother's oral health knowledge and oral health care behaviors and to find out factors that affected mothers' oral health care behavior for their young children. Methods : The survey was carried out with questionnaire about personal factor, cognitive factor, psychological factor and behavioral factor to 227 mothers. They had children from 3 to 5 years. The collected data was analyzed by SPSS WIN 12.0. Results : There were statistically significant differences in oral health knowledges as mother's educational background, importance of oral health, experience of oral health education, and oral health locus of control. There were statistically significant differences in mother's oral health care behaviors as mother's job, interest of oral health, importance of oral health, experience of oral health education, and oral health locus of control. And mother' oral health care behavior for herself, interest of oral health, and oral health locus of control were found as important variables in mothers's oral health care behavior for their children. Conclusions : Mother's oral health care behavior for herself was the powerful factor that affected mother's oral health care behavior for her children.