The aims of this study were; to evaluate the skeletal and dental characteristics of both the mandible and maxilla in patients with Class II division 1 malocclusion using different cephalometric measurements, to determine sex differences and to define the basic characteristics of Class II div 1 malocclusion by comparing the data with Turkish norms. The sample of the study consisted of 100 subjects (48 males, 52 females) aged between 8–14 years (mean age 12 years 8 months ± 1 year 6 months). Four different analyses were employed to evaluate the skeletal and lateral properties of both the maxilla and mandible. Subsequently the results of the analyses were compared with Turkish norms described by Basciftci et al. Student t-test was used to compare the data with Turkish norms and to determine the sex differences. The results of the study suggest that the subjects with Class II malocclusion tend to have normally positioned maxilla and retruded mandible in sagittal direction and those lower and upper incisors are inclined and positioned within acceptable range, showing normal vertical dimensions relations. The only difference between sexes was the value of U1-NA (°). Females were found to have protruded upper incisors. Statistically significant differences were found between the finding and Turkish norms except for the A _ Nasion perpendicular distance and L1-NB angle. As a conclusion, the results of this investigation suggest that the patients included in the study sample tend to have normally positioned maxilla and retruded mandible.

Keywords: Orthodontics, Class II malocclusion, Sagittal position