Abstract
By comparing data obtained by a dental caries research team on the Scientific Research Program of the Ministry of Education in 1950, results of a dental disease public survey conducted by the Medical Affairs Bureau of the Ministry of Welfare in 1957, and significant differences between the school children of two Izu islands reported in a survey conducted in 1958, this writer made the following findings:
1) Among the school children on Hachijo Island, those between six and eleven years of age showed the highest dental caries rates, ranging from 82.1% to 96.0%.
2) Among the school children on Oshima Island, those between twelve and fourteen years of age showed the highest dental caries rate, ranging from 88.0% to 93.1%.
3) On Oshima, the dental caries rate for six-year-old school children was lower than on Hachijo Island, but no significant difference was noted between the two rates when these were considered in comparison with the national averages in the Ministry of Education and Ministry of Welfare surveys.
