MR imaging of the temporomandibular joint.

Temporomandibular joint (TMJ) internal derangement is fairly prevalent in patients presenting with facial pain. MR imaging has become the primary modality for the assessment of the temporomandibular joint. A review of the normal anatomy and the key imaging findings of the different pathologic entities affecting this joint are presented. A reading algorithm to facilitate a systematic interpretation of the TMJ imaging study also is provided.