Three‐dimensional analysis of facial shape and symmetry in twins using laser surface scanning (original) (raw)
2012, Orthodontics & Craniofacial Research
Structured ObjectivesThree‐dimensional analysis of facial shape and symmetry in twins.Setting and Sample PopulationFaces of 37 twin pairs [19 monozygotic (MZ) and 18 dizygotic (DZ)] were laser scanned at the age of 15 during a follow‐up of the Avon Longitudinal Study of Parents and Children (ALSPAC), South West of England.Material and MethodsFacial shape was analysed using two methods: 1) Procrustes analysis of landmark configurations (63 x, y and z coordinates of 21 facial landmarks) and 2) three‐dimensional comparisons of facial surfaces within each twin pair. Monozygotic and DZ twins were compared using ellipsoids representing 95% of the variation in landmark configurations and surface‐based average faces. Facial symmetry was analysed by superimposing the original and mirror facial images.ResultsBoth analyses showed greater similarity of facial shape in MZ twins, with lower third being the least similar. Procrustes analysis did not reveal any significant difference in facial land...
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