한국아동(韓國兒童)의 치아우식경험과 치면상(齒面上) Streptococcus mutans 분포(分布)에 대(對)한 연구(硏究)

Relationship between the Caries Experience of Korean School Children and the Distribution of Streptococcus mutans in Dental Plaque

  • 김각균 (서울대학교 치과대학 구강미생물학교실) ;
  • 최선진 (서울대학교 치과대학 구강미생물학교실) ;
  • 임창윤 (서울대학교 치과대학 구강병리학교실) ;
  • 장우현 (서울대학교 의과대학 미생물학교실)
  • Kim, Kack-Kyun (Department of Oral Microbiology, College of Dentistry, Seoul National University) ;
  • Choe, Son-Jin (Department of Oral Microbiology, College of Dentistry, Seoul National University) ;
  • Lim, Chang-Yoon (Department of Oral Pathology, College of Dentistry, Seoul National University) ;
  • Chang, Woo-Hyun (Department of Microbiology, College of Medicine, Seoul National University)
  • 발행 : 1983.12.31

초록

Various investigations have been carried out to elucidate the causative relationship between specific oral bacterial species and dental caries since it was first demonstrated that selected streptococoal species produced dental caries in germfree rats when fed a high-sucrose diet. Now, S. mutans is considered to play an important role in the development of dental caries in animals and humans, and only a limited number of species of bacteria other than S. mutans are occasionally found to be cariogenic in experimental animals. In this regard, association of the number of S. mutans in approximal plaque with caries experience (DMFT) was studied from 137 Korean school children($10{\sim}11$ year old). Biotypes of the collected strains of S. mutans were determined, and their relationship with caries status was also examined. The following results were emerged from the study. 1. S. mutans was detected in the plaques of all children. 2. Statistically significant positive correlation(r=0.445, p<0.001) was found between the caries experience(DMFT) and the number of S. mutans in approximal plaques. 3. The number of S. mutans were significantly higher(p<0.001) in plaques removed from carious surface than from sound surface. 4. The most frequent biotype was biotype I(78.8%), followed by IV(33.1%) and V(09.5%). Biotype II was isolated in the plaque of two children(1.7%) only. 5. There was no apparent relation of specific biotypes to carious status.

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