Document Detail

Finite-element morphometry of soft tissue morphology in subjects with untreated Class III malocclusions.
MedLine Citation:
PMID:  10371426     Owner:  NLM     Status:  MEDLINE    
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.
G D Singh; J A McNamara; S Lozanoff
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Angle orthodontist     Volume:  69     ISSN:  0003-3219     ISO Abbreviation:  Angle Orthod     Publication Date:  1999 Jun 
Date Detail:
Created Date:  1999-08-04     Completed Date:  1999-08-04     Revised Date:  2009-09-29    
Medline Journal Info:
Nlm Unique ID:  0370550     Medline TA:  Angle Orthod     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  215-24     Citation Subset:  D; IM    
Dundee Dental Hospital and School, University of Dundee, Scotland, UK.
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MeSH Terms
Case-Control Studies
Cephalometry / methods*
Child, Preschool
Chin / pathology
Cross-Sectional Studies
Dental Occlusion
Finite Element Analysis*
Least-Squares Analysis
Malocclusion, Angle Class III / pathology*
Maxillofacial Development
Mouth / pathology
Nose / pathology
Radiographic Image Enhancement
Reproducibility of Results
Grant Support
//Wellcome Trust

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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