OBJECTIVE: Facial attractiveness is an important factor in our social interactions. It is still not entirely clear which factors influence the attractiveness of a face and facial asymmetry appears to play a certain role. The aim of the present study was to assess the association between facial attractiveness and regional facial asymmetries evaluated on three-dimensional (3D) images. METHODS: 3D facial images of 59 (23 male, 36 female) young adult patients (age 16-25 years) before orthodontic treatment were evaluated for asymmetry. The same 3D images were presented to 12 lay judges who rated the attractiveness of each subject on a 100mm visual analogue scale. Reliability of the method was assessed with Bland-Altman plots and Cronbach's alpha coefficient. RESULTS: All subjects showed a certain amount of asymmetry in all regions of the face; most asymmetry was found in the chin and cheek areas and less in the lip, nose and forehead areas. No statistically significant differences in regional facial asymmetries were found between male and female subjects (P > 0.05). Regression analyses demonstrated that the judgement of facial attractiveness was not influenced by absolute regional facial asymmetries when gender, facial width-to-height ratio and type of malocclusion were controlled (P > 0.05). LIMITATIONS: A potential limitation of the study could be that other biologic and cultural factors influencing the perception of facial attractiveness were not controlled for. CONCLUSIONS: A small amount of asymmetry was present in all subjects assessed in this study, and asymmetry of this magnitude may not influence the assessment of facial attractiveness.

*****Department of Orthodontics Palacky University Olomouc Czech Republic

****Department of Maxillofacial Surgery Radboud University Medical Centre Nijmegen The Netherlands and

***Department of Orthodontics and Dentofacial Orthopedics Faculty of Oral and Dental Medicine Cairo University Cairo Egypt

**Faculty of Dentistry Kuwait University Kuwait City Kuwait

*Department of Orthodontics and Dentofacial Orthopedics University of Bern Switzerland

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