Effect of Overjet on the Maxillary and Mandibular Morphology: A Cephalometric Study

Introduction: An important component of many orthodontic assessments is an evaluation of the horizontal relationship of the teeth and jaws. In this study, an attempt was made to assess the gender differences in the maxillary and mandibular morphology in different overjet groups. This is useful in analysis of malocclusion and prediction of treatment success. Materials and methods: Lateral cephalograms of a total 64 subjects were taken. The chronological ages of the subjects ranged from 18 to 24 years. The 64 subjects were selected on the basis of overjet and were divided into four groups according to overjet size. Finally, each overjet group consists of 16 subjects (eight males and eight females). Thirteen linear and one angular measurement were used to assess the maxillary and mandibular morphology. Results and conclusion: Analysis of variance shows that for males MxAABH (maxillary anterior alveolar and basal height), ANS-PNS (palatal length), Cd-Gn (mandibular length), RW (ramus width), and gonial angle were found statistically significant among overjet groups and in females MxAABH, MxAD (maxillary anterior depth), Cd-Gn, SD (symphysis depth) and RW were found significant among overjet groups. Correlations were found significant for both males and females in relation to Cd-Gn, RW and gonial angle parameters.