Cephalometric features of skeletal Class I, II and III (A comparative study)

Abstract

Aims: To identify the cephalometric features of three skeletal jaw relations (Class I, II and III). Materials and methods: one hundred thirty four students were selected aged 12-15 years from secondary schools in Mosul City, 45 with Class I normal occlusion as control, 44 with Class II malocclusion and 45 with Class III malocclusion, after taking the lateral cephalometric radiographs according to ANB angle. A 20 variables (12 angular and 8 linear) were used in this study to correlate these variables in the three skeletal Classes. Results: No significant sex differences were observed for the majority of angular and linear measurements for the three skeletal types. Anterior cranial base length (S-N) and saddle angle (NSAr) didn't show significant difference among the three skeletal Classes, the posterior cranial base (S-Ar) was shorter in Class III which indicate the anterior articulation of the mandible.