Arthro-CT in detecting sideways displacement of the temporomandibular joint disk.

One of the major disadvantages of sagittal arthrotomography of the temporomandibular joint is its limited capability to detect sideways (medial or lateral) disk displacement. Several arthrographic signs, suggesting sideways disk displacement have been described in recent reports. The most important one is the edge sign. In doubtful cases, arthro-CT can be used for depiction of medial or lateral disk displacement.