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논문 기본 정보

자료유형
학술저널
저자정보
김지혜 (경북대학교) 정은경 (울산과학대학) 최연희 (경북대학교) 송근배 (경북대학교)
저널정보
대한예방치과·구강보건학회 대한구강보건학회지 대한구강보건학회지 제36권 제1호
발행연도
2012.3
수록면
1 - 6 (6page)

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Objectives: Streptococcus mutans (S. mutans) is the major causative bacteria in human dental decay.Most findings have shown that S. mutans are widely distributed in populations with moderate to high caries prevalence. However, observations have shown that S. mutans are also frequent in populations with low caries prevalence, as well. This study evaluated the relationship between the dental caries experience and the virulence factors of S. mutans, which are isolated from caries-free and high-caries individuals.Methods: The dental caries experience states with the WHO diagnostic criteria, which were examined for children (aged 8 to 9 years) from two schools that are located in Daegu, Korea. A total of 22 cariesfree (dfs+DFS=0) and 12 high-caries (dfs+DFS≥14, ds+DS≥9) were selected for this study. Dental plaque samples were obtained and incubated in MSB plate to culture S. mutans . After isolation and identification, the level of S. mutans, attachment ability, and streomicroscopy were analyzed.Results: The S. mutans counts and attachment ability were higher in the high-caries group than in the caries-free group (P<0.05). In addition, the colonies isolated from the caries-free group adhered less strongly to the Mitis Salivarius Bacitracin agar. There were less of the sticky substances from the surface of the S. mutans colonies in the caries-free group.Conclusions: These results indicate that caries activity affected by the virulence not only the number of S.mutans.

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