Document Detail

The relationship between mouth opening and computerized tomographic features of posttraumatic bony ankylosis of the temporomandibular joint.
MedLine Citation:
PMID:  21310355     Owner:  NLM     Status:  In-Data-Review    
OBJECTIVE: The purpose of this paper was to investigate the relationship between mouth opening and computerized tomography (CT) features in patients with bony ankylosis of the temporomandibular joint.
STUDY DESIGN: A series of morphologic parameters-the diameters of bony mass (D1), the width of bony fusion area (D2), the ratio of D2/D1, and the degree of calcification in bony fusion area (D3)-were measured by Mimics 10.0 software. Correlation analysis and stepwise multiple linear regression analysis were the statistical methods used.
RESULTS: Nine patients (23.68%) with bony fusion area fully calcified were completely unable to open their mouth, whereas 29 patients (76.32%) with bony fusion area calcified incompletely had a slight degree of mouth opening. No correlation was found between mouth opening and D1. A negative correlation was observed between mouth opening and D2 (r = -0.670; P < .01), between mouth opening and D2/D1 (r = -0.697; P < .01), and between mouth opening and D3 (r = -0.744; P < .01). Multiple stepwise regression analysis identified D2 and D3 as predictive factors of residual mouth opening.
CONCLUSIONS: D2 and D3 were independent factors affecting the mouth opening. The insufficient calcification of bony fusion area, which cannot fully limit the motion of ankylosed joint, may be an important cause of residual mouth opening in patients with complete bony ankylosis.
Yingbin Yan; Yi Zhang; Zhipeng Sun; Jiangming Li; E Xiao; Jingang An
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics     Volume:  111     ISSN:  1528-395X     ISO Abbreviation:  Oral Surg Oral Med Oral Pathol Oral Radiol Endod     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-02-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9508562     Medline TA:  Oral Surg Oral Med Oral Pathol Oral Radiol Endod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  354-61     Citation Subset:  D; IM    
Copyright Information:
Copyright © 2011 Mosby, Inc. All rights reserved.
Resident, Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Peking University, Beijing, China.
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