Permanent dental caries rate by levels in our research is lower than that in the research of Tran Thi Ngoc Bich et al. In our research, with ICDAS applied, shows that: in S3 level (caries on dentin with cavities formed) dental caries rate is 67.1%, and in S1 (Dental caries classes I and II by ICDAS), 99.3%.