The characteristics of profile facial types and its relation with mandibular rotation in a sample of Iraqi adults with different skeletal relations

Abstract EN

Background: Facial type plays an important role in the information of an orthodontic treatment plan and prognosis that is whether an individual has long, short or average face and it is not possible to apply the same norms and treatment objective to cases with different facial patterns.

This study aims to determine the characteristics of Bimler's facial types (dolichoprosopic, mesoprosopic, leptoprosopic) and their relationship with mandibular rotation in Iraqi adults with different skeletal relations.

Materials and methods : the sample consisted of 230 digital true lateral cephalometric radiographs of age range between 18-30years (104 males and 126 females), the sample was classified according to ANB angle into three skeletal classes (class I, class II and class III) and each class was classified depended on PP-MP angle into three faces.

Thirteen cephalometric measurements (five angular, seven linear and one ratio) were measured for each individual radiograph using AutoCAD program 2006.

Results : the mean values of all measurements for males were significantly higher than females, except for the GA, UGA and LGA, The mean values of GA, LGA, AFH and LAFH were high in leptoprosopic face, while their values decreased in dolichoprosopic face and the reversed were found with JR, PFH, RL and MAXL, moreover all these measurements revealed a highly significant difference between the three facial types.

Conclusions : the mandibular rotation was not changed in all skeletal classes that belong to the same facial type as it did not affected by the antroposteriorly relation within the same profile.