Document Detail

Morphologic, functional, and occlusal characterization of mandibular lateral displacement malocclusion.
MedLine Citation:
PMID:  20362898     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Mandibular lateral displacement (MLD) is clinically characterized by deviation of the chin, facial asymmetry, dental midline discrepancy, crossbite in the posterior region, and high prevalence of internal derangement of the temporomandibular joint. Morphologic and functional characteristics of MLD should be clarified to correct and prevent this malocclusion. METHODS: We examined the morphologic features, occlusal scheme, and functional behavior of MLD in 116 patients. Facial morphology was examined with posteroanterior cephalograms, occlusion guidance on the articulator after face-bow transfer, and condylar movement with the condylograph. RESULTS: The superiorly inclined occlusal plane was associated with mandibular deviation in the same direction. The posterior occlusal plane on the shifted side was significantly steeper than that on the nonshifted side. Functional analysis of condylar movement showed a close relationship between the direction of MLD and the direction of condylar lateral shift during opening and closing, and protrusion and retrusion. The occlusal guidance inclination in the buccal segment of the nonshifted side was steeper than that in the shifted side. CONCLUSIONS: The results suggested that reduced vertical height of the dentition on 1 side induced mandibular lateral adaptation with contralateral condylar shift (asymmetry); this leads to condylar lateral shift during functional movement.
Kyoko Ishizaki; Koichi Suzuki; Tomofumi Mito; Eliana Midori Tanaka; Sadao Sato
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics     Volume:  137     ISSN:  1097-6752     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-04-05     Completed Date:  2010-05-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  454.e1-9; discussion 454-5     Citation Subset:  D; IM    
Copyright Information:
Copyright (c) 2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.
Department of Craniofacial Growth and Development Dentistry, Division of Orthodontics, Kanagawa Dental College, Yokosuka, Japan.
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MeSH Terms
Arthritis, Rheumatoid / pathology,  physiopathology
Bicuspid / pathology
Chin / pathology
Dental Arch / pathology
Dental Articulators
Dental Occlusion
Facial Asymmetry / pathology*,  physiopathology
Incisor / pathology
Jaw Relation Record
Malocclusion / pathology*,  physiopathology
Mandible / pathology*,  physiopathology
Mandibular Condyle / pathology,  physiopathology
Mastoid / pathology
Molar / pathology
Osteoarthritis / pathology,  physiopathology
Range of Motion, Articular / physiology
Temporal Bone / pathology
Temporomandibular Joint Disorders / pathology,  physiopathology
Vertical Dimension
Young Adult
Zygoma / pathology

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