Localisation of deformations of the midfacial complex in subjects with class III malocclusions employing thin-plate spline analysis

Journal of Anatomy
G D SinghS Lozanoff

Abstract

This study determines deformations of the midface that contribute to a class III appearance, employing thinplate spline analysis. A total of 135 lateral cephalographs of prepubertal children of European-American descent with either class III malocclusions or a class I molar occlusion were compared. The cephalographs were traced and checked, and 7 homologous landmarks of the midface were identified and digitised. The data sets were scaled to an equivalent size and subjected to Procrustes analysis. These statistical tests indicated significant differences (P < 0.05) between the averaged class I and class III morphologies. Thinplate spline analysis indicated that both affine and nonaffine transformations contribute towards the total spline for the averaged midfacial configuration. For nonaffine transformations, partial warp 3 had the highest magnitude, indicating the large scale deformations of the midfacial configuration. These deformations affected the palatal landmarks, and were associated with compression of the midfacial complex in the anteroposterior plane predominantly. Partial warp 4 produced some vertical compression of the posterior aspect of the midfacial complex whereas partial warps 1 and 2 indicated localised shape c...Continue Reading

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Citations

Mar 3, 2004·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·G D SinghJaime de Jesus-Vinas
Oct 18, 2000·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·T TachimuraT Wada
Oct 18, 2000·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·A D HayG D Singh
Jul 3, 2013·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Lina M Moreno UribeThomas E Southard
Apr 14, 2016·Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS·Ali Borzabadi-FarahaniMajid Shahmoradi
May 11, 2015·International Journal of Pediatric Otorhinolaryngology·Claire HarringtonAli Borzabadi-Farahani
Sep 13, 2000·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·A D Hay, G D Singh
Jun 1, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Senem Turan OzdemirCagatay Barut
Aug 27, 1999·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·G D Singh

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