長崎県離島の小学校児童における齲蝕罹患(Cohort 調査)に関する疫学的研究

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Recently, incidence of dental caries of Japanese children has shown no regional difference with development of mass media and traffic facilities. This time, incidence of dental caries of primary school children living at an isolated island in Nagasaki was investigated once a year from 1977 to 1982. A total of 130 subjects, 57 males and 73 females, were studied on their DMF index. The results were as follows : 1. The mean number of DMF teeth was 0.74±0.12 on the males and 0.58±0.11 on the females at the 1st grade and showed increasing tendency with progressive grade and 5.11±0.35 on the males and 5.85±0.37 on the females was observed for the 6th grade. No significant difference was shown between males and females for each school grade. High range of increased DMF tooth rate was observed from 2nd to 3rd grade on the males, and from 2nd to 3rd grade and from 4th to 5th grade on the females. 2. The DMF tooth rate on the upper first molars was 0∿7.88% and that on the lower ones 29.03∿42.86% at the 1st grade, and 90% or more on both males and females was observed for the 6th grade. High range of increased DMF tooth rate on the upper first molars was observed from 2nd to 4th grade and that on the lowers was observed from 1st to 3rd grade on both males and females. 3. Significant correlation was shown between the number of DMF teeth on the first molars at the 1st grade and that on the permanent teeth without first molars at each 4th, 5th or 6th grade, and it showed increasing tendency with progressive grade.
九州歯科学会の論文
1985-02-25

長崎県離島の小学校児童における齲蝕罹患(Cohort 調査)に関する疫学的研究

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