Facial dimensions and asymmetry in clinically symmetrical faces with skeletal Class I & Class III malocclusion in an adult sample aged between 18-28 years (digital panoramic study)

Abstract

Background: Several studies attempted to find the relationship between facial asymmetry and malocclusion andmany authors found some extent of asymmetry in individuals with normal occlusion. The purposes of this study wereto assess the amount and direction of facial asymmetry and the differences in facial angles and dimensions inclinically symmetrical faces with class I normal occlusion and class III malocclusion for both genders.Materials and Methods: The sample consisted of 58 individuals with clinically symmetrical faces aged 18-28 years,divided into two groups; class I group consisted of 30 individuals (14 males and 16 females) and class III groupconsisted of 28 individuals (14 males and 14 females). Clinical examination and digital lateral cephalometric andpanoramic radiographs were performed for each individual. Four angular (Go, Y-C-Go, Y-C-PTM and Y-C-O) andthree areal measurements (Maxillary, Mandibular and dental) were measured for each individual’s panoramicradiograph using AutoCAD program 2008.Results and Conclusions: The results showed that clinically symmetrical faces demonstrate significant asymmetry withthe left side being significantly larger than the right side and the amount of asymmetry was more at the level of themandible and the least amount of asymmetry was found at the dental area. The amount of asymmetry wasindependent of neither gender nor skeletal jaws relationship. Facial structures in term of size and shape are larger inmales than in females in both class I and class III groups.