About 4-28% of adult population has symptoms and signs related to the temporomandibular joint. MR imagings have advantages of direct visualization of articular disc and bilaminar zone, and of dynamic display of the motion of the temporomandibular
joint,
but arthrography has disadvantages of technical difficulty, invasiveness, risk of infection and indirect visualization of articular disc of the temporomandibular joint. Recently, there is an increasing tendency of the use of MR imaging of the
temporomandibular joint due to high diagnostic accuracy by a good depiction of the soft tissues and dynamic information of joint motion. The authors analysed the four normal MR findings from four asymptomatics, and classified the twelve, abnormal
MR
imagings from 8 symptomatics by the Wilkes's staging criteria of the internal derangement of the temporomandibular joint, and then tried modified cine display for visualization of the dynamic motion of the articular disc and adjacent soft tissues
such
as bilaminar zone and superior belly of the lateral pterygoid muscle of the temporomandibular joint.
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