Cross-sectional and Functional Imaging of the Temporomandibular Joint

Movie 1. Sagittal proton-density-weighted sequence shows a normal TMJ. The arrow indicates the posterior band, which is in the physiologic 11 o´clock position.

Movie 2. Coronal proton-density-weighted sequence shows a normal TMJ. The arrow indicates the disk, which does not bulge beyond the borders of the condylar process (indicated by the green lines).

Movie 3. Schematic in a sagittal projection of a normal jaw during jaw opening. The disk is in red.

Movie 4. Sagittal proton-density-weighted sequence from medial to lateral shows anterolateral disk displacement. The red arrow indicates the posterior band. The lateral component of this multidirectional displacement is indicated by the green arrow.

Movie 5. Coronal proton-density-weighted sequence shows a closed jaw. The lateral component (arrow) of a multidirectional anterolateral disk displacement is shown as it bulges beyond the lateral contour of the condylar head (green line).

Movie 6. Schematic in a sagittal projection of a jaw during jaw opening shows partial anterior disk (red) displacement with full recapture after jaw opening. When the jaw is closed, the posterior band is in the 10 o´clock position.

Movie 7. Sagittal proton-density-weighted sequence shows a jaw during different intervals of mouth opening. Partial anterior disk displacement with recapture is seen. The arrow indicates the posterior band.

Movie 8. Schematic in a sagittal projection of a jaw during jaw opening shows near complete anterior disk (red) displacement with no recapture.

Movie 9. Sagittal proton-density-weighted sequence shows a jaw during different intervals of mouth opening. Complete anterior disk displacement without recapture is seen. The arrow indicates the posterior band.

Movie 10. Axial multisection CT study shows bilateral displaced high condylar fractures. Compare Figure 19b, 19c.

Movie 11. Coronally reformatted multisection CT study of the same patient as in Movie 10 shows bilateral displaced high condylar fractures. Compare Figure 19b, 19c.

Movie 12. Coronally reformatted multisection CT study shows nondisplaced fracture of the zygomatic process on the right, fracture of the vertical condylar head on the right, and comminuted displaced fracture of the condylar head on the left. Compare Figure 20.

Movie 13. Sagittal STIR sequence shows rheumatoid arthritis of the TMJ from medial to lateral planes. Seen are synovitis (red arrow), which is characterised by increased water content and tissue swelling, anterior disk displacement (green arrow), and joint effusion (orange arrow).

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