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Dental Prescale과 편측 교합력 측정기를 이용한 정상성인의 교합력 비교
권호근,유자혜,권영숙,김백일,Kwon Ho-Keun,Yoo Ja-Hea,Kwon Young-Sook,Kim Baek-Il 대한치과보철학회 2006 대한치과보철학회지 Vol.44 No.1
Statement of problem: The previous unilateral bite force recorder has several limitations for taking long time for measuring and causing discomfort to subjects. Because of these reasons, it could not use widely for epidemiological researches. However, 'Dental Prescale System' which is new equipment for measuring bite force, is more convenient for measuring bite force than previous unilateral recorder. Purpose: The purpose of this study was to compare a new technique(Dental Prescale System) using pressure sensitive foils for recording of maximal jaw closing force with conventional measurement using unilateral bite force recorder Material and method: This studies included 22 healthy dental students in college of dentistry Yonsei university in Rep of Korea. Mean age was 23.9 years. All subjects had continuous dental arches and no significant malocclusion or signs from the teeth and craniomandibular system. The Dental Prescale System (Fuji Film, Tokyo, Japan) consists of a horseshoe-shaped pressure sensitive sheet (50H, R type) and a computerized scanning system.(FPD705) We also used unilateral bite force recorder(Denbotics Co. Seoul, Rep.Korea) for comparing with Dental Prescale. Results and conclusion: The total bite force recorded with Dental Prescale System (1423 N) was systematically higher than that recorded by unilateral bite force recorder. (256 N) However, the maximum bite force values measured in the two ways were significantly correlated (r=0.46, p<0.05). The Dental Prescale bite force calculated for first molar (208 N) was lower than that recorded by unilateral bite force recorder. (256 N) The two values were also very significantly correlated. (r=0.66. p<0.001) There were significantly different in bite force between two measurement methods. The reasons were first, unilateral bite force recorder measured only the bite force of a part of teeth, and Dental Prescale measured the total teeth force. Second, in measurement, a difference in muscle contraction appeared by an extent of mouth-opening. Third, unilateral bite force recorder has the reducing effect of the bite force by protective tape. Fourth, Dental Prescale has limitations during the computer scanning procedure. Therefore, Dental Prescale System is considered to be a very promising alternative to be conventional bite force recording methods.
Curcuma xanthorrhiza 추출물 및 함유 치약의 구취 억제 효과와 구강 유해균에 대한 선택적 항균 효과
김백일 ( Baek Il Kim ),김상년 ( Sang Nyun Kim ),장석윤 ( Sug Youn Chang ),문교태 ( Kyo Tae Moon ),김윤석 ( Yun Seog Kim ),황재관 ( Jae Kwan Hwang ),정승화 ( Seung Hwa Jeong ),김민영 ( Min Young Kim ),김해선 ( Hae Sun Kim ),권호근 대한예방치과·구강보건학회 2005 大韓口腔保健學會誌 Vol.29 No.2
권호근(Ho-Keun Kwon),차인호(In-Ho Cha),임소정(So-Jung Lim),최충호(Choong-Ho Choi),김백일(Baek-Il Kim) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.5
The purpose of this study was to investigate the relationship between oral cancer and such factors as smoking and drinking pattern, oral health status, dietary intake pattern, socio-economic status. Oral cancer patients and other disease patients who visited Yonsei University Dental Hospital from May to September in 2000 were selected as the study subjects. The numbers of cases and controls were 41, 108, respectively. Two groups were matched with age and sex for case control study. Oral examination and questionnaires survey was performed by the dentist. To assess the strength of associations between oral cancer and other variables, chisquare tests were performed. The results were as follows : 1. The durations of smoking and alcohol drinking were not related significantly with oral cancer. But the doses of smoking and alcohol intake increased the risk of oral cancer significantly(OR=2.52, 4.11, p〈0.05). 2. Denture wearing, the number of missing teeth and spicy and salty food, coffee, tea and fresh fruit intake frequency did not significantly increase the risk of oral cancer. But low education level, residency in rural area increased risk of oral cancer significantly(p〈0.01).