DENTAL HYGIENIC STUDY OF SCHOOL CHILDREN IN BEPPU HOT SPRING REGION : 2. RELATION BETWEEN THE HOT SPRING AND THE TIME OF DENTITION OF PERMANENT TEETH. RELATION OF DENTAL DENTITION AND V. W. INDEX

1. The author reports that the dentition of permanent teeth in the children of hot spring region is earlier than that of other regions. 2. The time of permanent tooth dentition in Beppu city reported by the author is earlier than that of the children in Tokyo reported by Okuie. 3. Dentition was earlier in male than in female children. 4. There is a correlation between the dentition and V.W. index.