Abstract
This study was to investigate the evaluation of carious invasion on the proximal and occlusal surfaces of upper and lower primary molars. The materials consisted of 77 teeth which had been extracted from children between the age of 6-14.
After radiographs of the materials had been taken and the electrical resistance had been measured, the relationsips between the visual and radiographic examination, and between the visual examination and the electrical resistance were examined.
The results were asfollows: 1) There was a significant correlation between the visual and the radiographic examination. (r=0.7915)
2) There was a significant correlation between the visual examination and the degree of carious invasion evaluated by radiographic examinaation. (r=0.7054)
3) Based on the examination of the relationship between the visual examination and tnd the electrical resistance, the significant correlation concering both occlusal surface and smooth surface were discovered. (occlusal surface: r=-0.5559, smooth surface: r=-0.73707)
4) Based on investigation of the carious extension on the proximal surface of primary molars by radiographic examination, there was found a significant correlation between the radiographic examination and the stage of carious extension. (r=0.7922)
