Cross-sectional and Functional Imaging of the Temporomandibular Joint: Radiology, Pathology, and Basic Biomechanics of the Jaw1

• Published in: Radiographics Vol. 23; no. 6; p. e14
• Main Authors: Oliver J. Sommer, Felix Aigner, Ansgar Rudisch, Hannes Gruber, Helga Fritsch, Werner Millesi, Michael Stiskal
• Format: Journal Article
• Language: English
• Published: Radiological Society of North America 01-11-2003
• ISSN: 0271-5333; 1527-1323
• DOI: 10.1148/rg.e14

The temporomandibular joint (TMJ) is a common site of complaint. Clicking sounds and pain are indicators of a frequent condition
called internal derangement, most often affecting females. As a general term, internal derangement describes a structural
abnormality within an articulation. The internal derangement of the TMJ is a specific term defined as an abnormal positional
and functional relationship between the disk and articulating surfaces. Imaging of the joint is an important element in the
diagnostic work-up. Trauma and inflammatory arthritis account for most of the other TMJ problems. A thorough understanding
of joint anatomy and normal function is a prerequisite for perceiving abnormalities and making the correct diagnosis. The
authors elucidate joint anatomy, correlating cadaveric specimen and anatomic slices with conventional and cross-sectional
imaging studies. TMJ biomechanics are illustrated with schematics and animations, and an overview of imaging strategies and
techniques is presented. Common abnormalities are described and illustrated, and a brief discussion of therapeutic options
is included.
© RSNA, 2003