Greater Mandibular Horizontal Condylar Angle is Associated with TMJ Osteoarthritis

Publication date: Available online 29 December 2016
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Peggy P. Lee, Alexander R. Stanton, Lars G. Hollender
BackgroundResearch using MRI analysis has shown that internal temporomandibular joint derangement is associated with significantly greater horizontal condylar angle. However, the association between osteoarthritic (OA) bony changes as shown in CT and horizontal condylar angle has never been evaluated.ObjectiveInvestigate the relationship between mandibular condylar angle and OA degenerative changes.Materials & MethodsThis is a retrospective study using cone beam computed tomography (CBCT) images and reports from 60 patients with unilateral OA degenerative changes and 43 control patients with no OA-affected joints.ResultsCondylar angles in the joints of control patients and the unaffected joints in OA patients were not significantly different. The average horizontal condylar angle in the unilaterally OA-affected joints (29.5^o±10.5^o) was larger than in the contralateral unaffected joints (22.5^o±7.7^o) (p < .001). In the OA-affected joints, flattening and erosion of the articular eminence was associated with a greater condylar angle (p<0.05).ConclusionsModerate to severe degenerative temporomandibular joint change is associated with greater condylar angle.



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