乳歯う蝕罹患に関する疫学的研究 : 数量化分析 I 類による検索

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An epidemiological analysis by quantification type I was made in Japan and Korea of dental caries prevalence of deciduous teeth. The subjects for the study consisted of 128 5-year-old children at Soungsin Kindergarten, Jeonju, Korea, 124 5-year-old children at Ogura Kindergarten, Kitakyushu, Japan, and 74 children with dental caries out of 804 visited for dental examination for 18-month-old children at the West Public Health Center, Fukuoka, Japan. The analysis was made of the data from the dental examinations performed and questionaries taken. The results were as follows : 1. Dental caries prevalence of deciduous teeth in Japan and Korea, and differences in dietary habits : For Ogura Kindergarten dmf index was 10.61 and 7.43 for Soungsin Kindergarten. The index for the Japanese children was significantly higher. The Japanese children were characterized by their multiple dental caries tendency in the primary incisors. Dietary habits revealed from the questionaries showed significant differences in the nurture environment, snack-time, and the kinds and intake rate of beverages (artificial fruit juice was consumed most in Japan). 2. Analysis by quantification type I of dental caries of deciduous teeth : When dmf teeth were taken as the outside variable, the partial correlation coefficient of 'tooth brushing factor' was highest and the multiple correlation coefficient of 7 variables was 0.64843 for Ogura Kindergarten, whereas for Soungsin Kindergarten the partial correlation coefficient of 'beverage-time' was highest and the multiple correlation coefficient of 7 variables was 0.45011, which was lower than that for the Japanese. Explanatory variables were divided into three independent variable groups and the multiple correlation coefficient of each variable group in each group was determined, and the values were compared. This comparison showed that the variable group related to 'beverage factor' and dental caries of deciduous teeth in 5-year-old children were most closely related. For 18-month-old children, the partial correlation coefficient of 'timing for stopping breast feeding' was highest when dmf tooth surface was taken as the outside variable and the multiple correlation coefficient of 7 variables was 0.58280. 3. Breast milk and dental caries of deciduous teeth : Comparison of 'timing for stopping breast feeding' between the children with and without dental caries indicated that many in the dental caries group had their breast milk stopped after 12 months, whereas many in the non-caries group had theirs stopped within 12 months. Between the children breast-fed for 12 months or longer and those for 6 months or shorter (use of nursing bottle also was stopped in 6 months or shorter), the dmf tooth surface index for the children breast-fed longer was significantly higher. The foregoing analysis by quantification type I indicated the need to intensify guidance on the following two points : (1) care must be taken on manners of giving amount and frequency of intake of beverages in the early childhood, (2) appropriate timing for stopping breast feeding must be taught.
九州歯科学会の論文
1981-05-25

著者

塚本末廣
福岡歯科大学成長発達歯学講座障害者歯科学分野

乳歯う蝕罹患に関する疫学的研究 : 数量化分析 I 類による検索

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