Facial asymmetry and midsagittal plane definition in 3D: A bias-free, automated method

Nikolaos Gkantidis, Jasmina Opacic, Georgios Kanavakis, Christos Katsaros and Demetrios Halazonetis

PLOS ONE, 2023, vol. 18, issue 11, 1-18

Abstract: Symmetry is a fundamental biological concept in all living organisms. It is related to a variety of physical and social traits ranging from genetic background integrity and developmental stability to the perception of physical appearance. Within this context, the study of human facial asymmetry carries a unique significance. Here, we validated an efficient method to assess 3D facial surface symmetry by best-fit approximating the original surface to its mirrored one. Following this step, the midsagittal plane of the face was automatically defined at the midpoints of the contralateral corresponding vertices of the superimposed models and colour coded distance maps were constructed. The method was tested by two operators using facial models of different surface size. The results show that the midsagittal plane definition was highly reproducible (maximum error

Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0294528

DOI: 10.1371/journal.pone.0294528

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