| Finite-element morphometry of soft tissue morphology in subjects with untreated Class III malocclusions. | |
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MedLine Citation:
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PMID: 10371426 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Soft tissue dynamics may contribute to maxillomandibular allometry (size-related changes in shape) associated with the development of Class III malocclusions. Lateral cephalographs of 124 prepubertal European American children were traced and 12 soft tissue landmarks were digitized. Resultant geometries were normalized, and Procrustes analysis established the statistical difference (p<0.001) between mean Class III and Class I configurations. Comparing the Class III configurations with normals for size-change, color-coded finite element analysis revealed a superoinferior gradient of positive allometry of the Class III facial nodal mesh. A conspicuous area of negative allometry (approximately 40%) was localized near soft subspinale, with a approximately 70% increase in size in the mental region. For shape-change, the Class III facial mesh was isotropic, except in the anisotropic circumoral regions. Conventional cephalometry revealed that about 50% of linear and 75% of angular parameters differed statistically (p<0.001). Soft tissue dynamics during early postnatal development may contribute to the development of Class III malocclusions. |
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Authors:
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G D Singh; J A McNamara; S Lozanoff |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Angle orthodontist Volume: 69 ISSN: 0003-3219 ISO Abbreviation: Angle Orthod Publication Date: 1999 Jun |
Date Detail:
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Created Date: 1999-08-04 Completed Date: 1999-08-04 Revised Date: 2009-09-29 |
Medline Journal Info:
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Nlm Unique ID: 0370550 Medline TA: Angle Orthod Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 215-24 Citation Subset: D; IM |
Affiliation:
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Dundee Dental Hospital and School, University of Dundee, Scotland, UK. g.d.singh@dundee.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Case-Control Studies Cephalometry / methods* Child Child, Preschool Chin / pathology Cross-Sectional Studies Dental Occlusion Face* Female Finite Element Analysis* Humans Least-Squares Analysis Male Malocclusion, Angle Class III / pathology* Maxillofacial Development Mouth / pathology Nose / pathology Radiographic Image Enhancement Reproducibility of Results |
| Grant Support | |
ID/Acronym/Agency:
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//Wellcome Trust |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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