Fluctuating asymmetry of the normal facial skeleton

International Journal of Oral and Maxillofacial Surgery
J GateñoJ J Xia

Abstract

The purpose of this study was to produce reliable estimations of fluctuating facial asymmetry in a normal population. Fifty-four computed tomography (CT) facial models of average-looking and symmetrical Chinese subjects with a class I occlusion were used in this study. Eleven midline landmarks and 12 pairs of bilateral landmarks were digitized. The repeatability of the landmark digitization was first evaluated. A Procrustes analysis was then used to measure the fluctuating asymmetry of each CT model, after all of the models had been scaled to the average face size of the study sample. A principal component analysis was finally used to establish the direction of the fluctuating asymmetries. The results showed that there was excellent absolute agreement among the three repeated measurements. The mean fluctuating asymmetry of the average-size face varied at each anthropometric landmark site, ranging from 1.0mm to 2.8mm. At the 95% upper limit, the asymmetries ranged from 2.2mm to 5.7mm. Most of the asymmetry of the midline structures was mediolateral, while the asymmetry of the bilateral landmarks was more equally distributed. These values are for the average face. People with larger faces will have higher values, while subjects w...Continue Reading

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Citations

Jul 15, 2018·Aesthetic Surgery Journal·Anne BarmettlerGeoffrey J Gladstone
Mar 17, 2020·The Journal of Craniofacial Surgery·Kyle S GabrickMichael Alperovich
Jan 13, 2021·International Journal of Environmental Research and Public Health·Giuseppe CurròGiuseppe Alessandro Scardina
Nov 10, 2020·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Yuncong LiXiaoyi Hu
May 8, 2021·Annals of Human Biology·Marie Jandová, Petra Urbanová
Aug 14, 2021·Clinical Oral Investigations·Nermin MorganReinhilde Jacobs

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