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Objectives: To assess the caries prevalence among 7-9-year-old children using ICDAS Ⅱ criteria and the influence of oral health behavior on caries.Methods: A sample of 251 children was examined for caries prevalence using ICDAS Ⅱ criteria and the D-S values were calculated at four ICDAS cut-off points, namely D1+2-S, D1-6-S, D3-6-S and D5+6-S.