• Proceedings of the KAIS Fall Conference
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• 2008.11a
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• pp.240-242
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• 2008

본 논문은 치아의 전치 교합과 후치 교합 상태에서 획득된 영상들에 대해 BMME와 LDA에 기반한 개인 인증 방법을 제안한다. 이 방법은 두 치아 교합 상태의 영상들로부터 치아 영역 추출, BMME, 패턴인식 과정으로 구성된다. 두 상태의 치아 교합을 사용하면 영상에서 일정한 치아 모양이 유지되며, BMME는 패턴인식에서 정합 오차를 줄일 수 있도록 해 준다. 강체인 치아는 영상 획득시 왜곡되지 않으므로 치아 영상을 이용하는 방법은 생체 인식에 장점으로 작용한다. 실험에서, 제안한 방법은 20명에 대해 개인 인증을 위한 인식에 성공하여 다중 인증 시스템에 사용될 수 있음을 보였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.2
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• pp.200-205
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• 2006

Abstract This paper presents a personal identification method based on BMME and LDA for images acquired at anterior and posterior occlusion expression of teeth. The method consists of teeth region extraction, BMME, and pattern recognition forthe images acquired at the anterior and posterior occlusion state of teeth. Two occlusions can provide consistent teeth appearance in images and BMME can reduce matching error in pattern recognition. Using teeth images can be beneficial in recognition because teeth, rigid objects, cannot be deformed at the moment of image acquisition. In the experiments, the algorithm was successful in teeth recognition for personal identification for 20 people, which encouraged our method to be able to contribute to multi-modal authentication systems.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.848-850
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• 2007

본 논문은 치아의 모양, 크기 및 턱의 모양 등과 같은 치아의 기하학적인 특징들을 사용하여 치아의 성 변별시스템에 PCA기법과 LDA기법을 각각 적용하고 두 기법을 비교분석한다. PCA기법과 LDA기법은 생체인식을 위한 주요 매핑기법으로 알려져 있다. PCA분석 기법을 적용하여 성변별의 결과 76%의 인식률이 획득되었으며, LDA분석기법은 66%의 인식률이 획득되었다. 본 연구의 결과로부터 PCA기법은 치아의 성변별에 있어 LDA기법보다 우수한 성능을 제공함을 확인할 수 있었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.231-234
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• 2002

This paper considers a system related to biometrics which can control entrance and exit based on pattern and feature of a tooth. It is aimed at research and development of a controling entrance and exit system connected advanced image understanding technique using a tooth recognition that treats a tooth of simple and fixed structure. We think that the system is applied(or utilized) as pre-step or assistance means of face recognition and expect that the system achieves greatly effective results.

• Journal of Digital Convergence
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• v.14 no.2
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• pp.315-324
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• 2016

The purpose of the study are expected to provide some basic information on counseling, diagnosis and treatment planning for patients related to teeth care. A self-reported questionnaire was filled out by 320 subjects in Seoul and Gyeonggi from May to August, 2015 after permission from Institutional Review Board (IRB). Except 18 copies, 302 data were analyzed using SPSS WIN 19.0 program. The questionnaire consisted of four questions of the general characteristics of the subjects, ten questions of the awareness toward of subjective teeth, five questions of the influence of teeth on appearance, and ten questions of self-esteem. The dependent variables made a 23.4% prediction of self-esteem. If they have higher education(p<0.001), influence of teeth on appearance(p<0.001) and the awareness toward of subjective teeth(p<0.001) had significant influence on self-esteem. The findings suggest that heightened subjective awareness toward teeth seems to be of use for the improvement of self-esteem. Therefore it's required to make an effort to take good care of teeth in terms of color or arrangement as well as oral health.

• 건강소식
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• v.26 no.6 s.283
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• pp.6-13
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• 2002

최근 우리나라 의료보험재정에서 구강진료비로 사용된 액수가 1990년에 1,869억원이었고, 1994년에 2,786억원, 1995년도에 3,507억원, 1998에는 5,986억원, 1999년에는 6,778억원으로 지난 10년간 계속 증가하는 양상을 보이고 있다. 그러나 치아우식증과 치주병으로 인하여 발거된 치아를 보철하는 비용은 이 치료비보다 훨씬 많을 것으로 추정되고 있어서 구강건강 관리비가 국민에게 부담이 되고 있을 것으로 추정된다. 과거부터 치아건강이 오복의 하나에 들 만큼 소중함에도 불구하고 여전히 치아우식증(충치)를 포함한 구강질환은 우리나라 사람의 다빈도 질환으로 자리 잡고 있다. 이달의 건강 길라잡이에서는 6월 9일 ‘치아의 날’에 즈음하여 일반적인 구강건강과 특히 청소년기 치아건강의 중요성을 새롭게 인식함으로써 외상으로부터 치아를 보호하여 평생 치아건강으로 적극적인 건강생활을 실천하는 계기를 마련하고자 한다.

• Journal of dental hygiene science
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• v.12 no.2
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• pp.115-121
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• 2012

The aim of this study was to investigate the correlations between the self-reported symptoms of periodontal diseases and the quality of life. This study conducted its questionnaire survey over the subjects of 450 adults who had ever visited dental clinics among the adults of age 35-65 living in Seoul and Gyeonggi-do region from January 7 to March 14, 2010. The data were analyzed using a chi-square test, t-test, binominal logistic regression analysis in the SPSS version 12.0 program. Among the self-reported symptoms of periodontal diseases, 65% of respondents perceived that 'I bleed from the gums in brushing my teeth', which was the most, whereas 18.8% of respondents perceived to 'tooth mobility', which was the least. Self-reported symptoms of periodontal diseases was associated with socio-demographic characteristics such as sex, age, level of education and periodic oral examination, dental scaling(p<0.05). People who perceived the symptoms of periodontal diseases experienced functional limitation, physical pain, psychological discomfort, disability in diverse domains, and social handicap more than the group who did not perceive them(p<0.001). OHIP-14 scores were significantly correlated with sex, bleeding gums, swollen gums and bad breath(p<0.05). This study showed the self-reported periodontal problem had a negative impact on the public's leading their happy life. Therefore, in order to enhance the quality of life in adults, it is necessary to prevent periodontal diseases and reduce the subjective symptoms.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.9 no.1
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• pp.42-46
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• 2000

치아형태라고 하면 따분하고 재미없는 것으로 생각하기 쉽지만, 치과임상에서 아주 중요한 기초를 형성하고 있다. 지대치형성은 치과보철수복의 첫 단계로서, 좋은 지대치형성은 좋은 보철물로 연결된다. 또한 치과보철 수복의 대부분은 원래의 치아형태수복에 맞추어져 있어서, 치아형태와 지대치형성은 많은 상관성을 가지고 있을 것이라고 유추해 볼 수 있다. 그러나 통상적으로 알고 있는 치아형태는 교합변형태로만 인식하고 있어서, 지대치형성시 치아형태가 큰 도움을 주지는 못하는 실정에 있다. 물론 교합면형태도 중요하지만 그외의 여러형태도 치과임상에 있어서 결코 무시할 수 없다. 필자는 지대치형성에서 고려해야 할 치아형태와 임상적 중요성에 대해서 언급하여 치과의사선생님들의 임상에 도움을 주고자 한다.

• Journal of the korean academy of Pediatric Dentistry
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• v.36 no.4
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• pp.539-549
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• 2009

The purpose of this study was to investigate the prevalence of dental caries, periodontal status, and self-perceived oral health status of students in juvenile protection education institutions. The subjects of this study were 342 adolescents aged 13-20 years detained in two juvenile protection education institutions located in Gyeonggi Province. The study involved an oral examination to record decayed, missing, filled teeth and index teeth with bleeding, calculus, or periodontal pocket, combined with a questionnaire to investigate self-perceived oral health status. The main findings are as follows. 1. When compared with the result of National oral health survey, the students detained had more decayed teeth, DMFT, and teeth with bleeding, calculus, and shallow pocket than general population of the same age. 2. Female students showed more DMFT, more teeth with healthy periodontium, and fewer teeth with shallow pocket than male students (p<0.05). 3. Female students perceived their health to be poorer than male students (p<0.05). A majority(79.2%) of detainee valued their oral health in their life. 4. A majority(71.5%) of detainee reported their dental anxiety, and more female adolescents showed dental anxiety than male adolescents(p<0.05).

• Korean journal of food and cookery science
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• v.20 no.1
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• pp.1-10
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• 2004

This study was executed to find the effects of dietary control and oral health care on dental caries and oral problems in elementary school students, including the effects of nutritional and oral health education on the prevention of dental caries. 1. The oral health study found that 88.9％ of students brushed their teeth everyday, 63.7％ 2 times a day, and 50.4％ in the morning and at night. 2. According to the general characteristics whether or not, the female students had more dental caries than the males, and 29.1％ of the students that had dental caries ate snacke 1 or 2 times a day. 3. After the nutritional education, more students brushed their teeth in the after meal 4. According to gender, grade and nutritional education for oral health care, male students and higher grade students were more aware that “brushing teeth after meals is better than before”. The male and higher grade students, after the nutritional education, were more aware that “Bones and teeth are made from calcium”, and “Fluorine prevents teeth from dental caries” and the differences between the genders were statistically significant in relation to both these facts (p〈0.05) and before and after education (p〈0.01). The male and higher grade students, and those nutritionally educated were more conscious that “vegetables and fruits are good for teeth”, with the differences before and after the nutritional education were statistically significant (p〈0.05). The male and higher grade students were well aware that “Foods that have sugar cause dental caries”, and significant differences were shown between grades (p〈0.05). The male and higher grade students, after the nutritional education and were well aware that “Milk is good for teeth”, with a significant gender difference (p〈0.05). The female and higher grade students, and those after nutritional education were well aware that “Dental caries can not be perfectly cured once it had already occurred”. after nutrition, but not much differences.