stuck temporomandibular joint disc
A stuck disc, also called anchored disc phenomenon, refers to a temporomandibular joint (TMJ) disc which does not translate anteriorly out of the mandibular fossa onto the articular eminence but rather remains (thus "stuck") in the fossa. It is a form of TMJ dysfunction.
Clinical presentation
Patients may experience a sudden, severe, inflexible and persistent restriction of the mouth opening.
Deviation of the mandibular midline toward the affected side with limited movements (0 - 10 mm).
No pain in the masticatory muscles or the joints.
Radiographic features
Plain radiograph and CT
- normal temporomandibular joint
- during mouth opening, the condylar process rotates in the region of the fossa with no evidence of sliding down the slope of the eminence.
Arthrography
Normal shaped disc.
MRI
Sticking of the disc to the mandibular fossa.
Treatment
Treatment is with arthroscopic adhesionectomy.
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