الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Magnetic resonance imaging (MRI) of the TMJ has resulted in better understanding of the TMJ and a better comprehension of its disorders. MRI can provide positional information about the disk location, quantitative data about the synovial fluid, and qualitative information about the status of the retro-discal tissues and the condition of the bone marrow. The present study included 30 patients (60 TMJs) with different clinical signs and symptoms of TMJD aiming to evaluate the role of MRI in diagnosis of tempromandibular joint dysfunction. All cases underwent MRI on bilateral TMJs. Anterior disc displacement was the most frequent MRI finding and classified to anterior disc displacement with reduction (ADR) and anterior disc displacement without reduction (ADNR). Eight TMJs were diagnosed as ADR and 11 TMJs were diagnosed as ADNR. Three TMJs had disc degenerations, 2 TMJs had disc buckling, 2 TMJs had osteoarthritis and 11 TMJs had limited condyle translation. Pain was the most frequent symptoms, it was present in 58/60 joints. clicking was present in all cases proved to be ADR. Restricted movement of the joint was present in all case diagnosed as ADNR. All patients presented with locking had ADNR. The degree of the ADD was positively correlated with the severity of the signs and symptoms. patients presented with pain and clicking were diagnosed as ADR and patients presented with pain, restricted movement and locking were diagnosed as ADNR with joint effusion and abnormal disc morphology and limited condyle translation. - Correlation between the clinical and MRI diagnosis of TMJDs revealed that 8 TMJs were clinically and MRI diagnosed as ADR (14 TMJs were clinically suspected to have ADR) and 11 TMJs were clinically and MRI diagnosed as ADNR (9 TMJs were clinically suspected to have ADNR). from the above, we concluded that MRI was highly accurate in diagnosis of disc displacement and other causes of TMJD. It is the only noninvasive imaging technique that can visualize the articular disk and is highly recommended as the imaging modality of choice for patients with internal derangement of the temporomandibular joint.