都城市外農村小・中学生の歯の交換について

概要

論文の詳細を見る
A field study has been undertaken on the selected groups of public school pupils residing under similar environmental conditions in the suburban communities of Miyakonojo city, Miyazaki prefecture, with special reference to the status of tooth exchange. 1. The earliest shedding of deciduous teeth and likewise earliest eruption of permanent teeth were observed in the group of Mimata-machi, followed by those of Yamada machi and Nishidake district in this order. 2. Reflecting individual geographic situations of the communities, 58% of the plainsmen in Mimata-machi, each 77% and 81% of the highlanders of Yamada-machi and Nishidake were respectively engaged in farming as the chief means of living. 3. Study in physical and chemical analysis of the water and soil in the respective area as reported by us elsewhere, failed to reveal any significant connection with the data obtained on the tooth exchange in the present report. 4. The geographic situation of individual communities might have had some influences on the rate of acceleration of tooth exchange in these subject groups. It may be, however, almost negligible as compared to nutritional conditions or certain difference in the dietary habits of respective peoples in so far as this particular phase of tooth development is concerned.
九州歯科学会の論文
1963-03-31