Temporomandibular joint ankylosis contributing to coronoid process hyperplasia

Abstract The purpose of this study was to investigate the association between coronoid process hyperplasia and temporomandibular joint (TMJ) ankylosis and to analyze the pathological mechanism and clinical significance of coronoid process hyperplasia. Forty-four patients treated for TMJ ankylosis be...

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Bibliographic Details
Published in:	International journal of oral and maxillofacial surgery 2016-10, Vol.45 (10), p.1229-1233
Main Authors:	Wang, W.H, Xu, B, Zhang, B.J, Lou, H.Q
Format:	Article
Language:	eng
Subjects:	Adolescent Adult Aged Ankylosis - complications Ankylosis - diagnostic imaging Arthroplasty Case-Control Studies Child Child, Preschool coronoid process hyperplasia Dentistry Female Humans Hyperplasia - diagnostic imaging Hyperplasia - etiology Imaging, Three-Dimensional Male Middle Aged Retrospective Studies Surgery temporomandibular joint (TMJ) ankylosis Temporomandibular Joint - diagnostic imaging Temporomandibular Joint - pathology Temporomandibular Joint Disorders - diagnostic imaging Temporomandibular Joint Disorders - pathology three-dimensional cephalometric analysis
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Summary:	Abstract The purpose of this study was to investigate the association between coronoid process hyperplasia and temporomandibular joint (TMJ) ankylosis and to analyze the pathological mechanism and clinical significance of coronoid process hyperplasia. Forty-four patients treated for TMJ ankylosis between January 2007 and December 2014 were studied retrospectively; 176 patients with normal TMJs served as controls. The original DICOM data were used to reconstruct the jaw, and a three-dimensional cephalometric analysis (SimPlant Pro software version 11.04) was performed to assess the association between the severity of TMJ ankylosis and the height of the coronoid process. The height of the coronoid process was 20.41 ± 5.00 mm in the case group and 14.86 ± 2.67 mm in the control group; there was a significant difference between the two groups ( P < 0.001). Long-standing TMJ ankylosis contributes to coronoid process hyperplasia. Therefore, attention should be drawn to the coronoid process in patients with TMJ ankylosis. A coronoidectomy together with arthroplasty is recommended in patients with TMJ ankylosis.
ISSN:	0901-5027 1399-0020