ICDAS (International Caries Detection and Assessment System) is an evidence-based detection and assessment system classifying stages of the caries process on the basis of histological extent and activity. The ICDAS measures the visual surface changes which corresponds to the potential histological depth of carious lesions. In addition, it proposes the ICDAS radiographic scoring system, which categorizes lesions according to the depth of caries demineralization into enamel and dentin represented by a radiolucency on the radiographs. In this study, the aim was to assess the relationship between clinical and radiographic caries diagnoses among 12 to 14-year-old Egyptians using the ICDAS scoring system which differentiates between cavitated and non-cavitated caries lesions.