Abstract
On August 1950, I examined and treated number of dental caries and time of dental eruption of permanent teeth of the boys and girls of primary, secondary, and high school of Takane and Kamihata Villages in Yamaguchi Prefecture, and I obtained the following results. As to actual number of teeth in each year of age generally in which female children are greater number than male. and actual number of permanent teeth in each of age also female children are greater than male. As to rate of the dental caries female children from 7 to 9 years of age are greater than male and another years of age male children are greater. In whole materiell rich rate of dental caries are 48 percents, and it seems to be less than another quaters. The caries late of 1st permanent moler seems to be less than in Tokyo, by Higaki (1949). The time of dental eruption of permanent teeth seems to be later than in pre-war condition and earlier than in Tokyo City by Okuie (in 1948)(Author's abstracted).
