Magnetic resonance imaging in the evaluation of temporomandibular joint disc displacement--a review of 144 cases |
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Authors: | Whyte A M McNamara D Rosenberg I Whyte A W |
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Affiliation: | MRI Centre, 127 Hamersley Road, Subiaco, WA 6008, Australia. drwhyte@perthradclinic.com.au |
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Abstract: | One hundred and forty four patients underwent magnetic resonance imaging (MRI) for evaluation of suspected internal derangement (ID) of the temporomandibular joint (TMJ). All scans were performed on a state-of-the-art scanner by highly experienced technologists and evaluated by a single Head and Neck/Maxillofacial radiologist. Seventy-nine percent of patients were female and 21% male. Age distribution of the cases was bi-modal with first peak at 20-30 years of age and second peak at 50-60 years of age. Of the 82.5% of cases with disc displacement, 59.5% demonstrated reduction with opening and 40.5% did not reduce. Anterior disc displacement is common (44%) and sideways displacement rare (4%). Antero-lateral displacement was the second commonest type of displacement (29%) probably related to the weakness of the lateral disc attachment. |
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