Aim:The primary aim of this study is to compare the chronological age with the dental age of Saudi patients with non-syndromic cleft lip and palate (CLP). The patients' demographics (gender and age group) were analyzed further. Materials and methods: In total, 401 panoramic radiographs were assessed (195 and 206 for the control and the CLP groups, respectively). The subjects' ages ranged from 3 to 17 years, from both genders. The root and crown developmental stages of the mandibular permanent teeth were evaluated using Demirjian's method to calculate dental age. The subjects were separated into three groups according to chronological age. One investigator collected all the data, the intra-class correlation (ICC) coefficient test showed good reliability (0.984). A paired t test was then used to determine any statistically significant difference between the mean dental and chronological ages of the control and the cleft samples. The mean difference between chronological and dental ages was then calculated for the control and the cleft groups. A Student's t test was then used to compare the two mean differences.
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