| Morphologic, functional, and occlusal characterization of mandibular lateral displacement malocclusion. | |
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MedLine Citation:
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PMID: 20362898 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Kyoko Ishizaki; Koichi Suzuki; Tomofumi Mito; Eliana Midori Tanaka; Sadao Sato |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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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:
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Created Date: 2010-04-05 Completed Date: 2010-05-04 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8610224 Medline TA: Am J Orthod Dentofacial Orthop Country: United States |
Other Details:
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Languages: eng Pagination: 454.e1-9; discussion 454-5 Citation Subset: D; IM |
Copyright Information:
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Copyright (c) 2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Department of Craniofacial Growth and Development Dentistry, Division of Orthodontics, Kanagawa Dental College, Yokosuka, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Arthritis, Rheumatoid
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pathology,
physiopathology Bicuspid / pathology Cephalometry Chin / pathology Dental Arch / pathology Dental Articulators Dental Occlusion Facial Asymmetry / pathology*, physiopathology Female Humans Hyperplasia Incisor / pathology Jaw Relation Record Male Malocclusion / pathology*, physiopathology Mandible / pathology*, physiopathology Mandibular Condyle / pathology, physiopathology Mastoid / pathology Molar / pathology Osteoarthritis / pathology, physiopathology Range of Motion, Articular / physiology Rotation Temporal Bone / pathology Temporomandibular Joint Disorders / pathology, physiopathology Vertical Dimension Young Adult Zygoma / pathology |
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