Abstract
This study was to investigate the initial spot of the caries of the upper and lower primary molars.
The materials were 341 primary molars in total 98 upper first molars,103 upper second molars,67 lower first molars, and 73 lower second molars which had been extracted in children from 6 to 14 years of age.
Measurments were taken in the distance from the central point of the caries to the anatomically cervical line, and to the salient point of the mesial or buccal surface.
The results were as follows;
