Which clinical finding is most characteristic of an anterior disc displacement with reduction of the temporomandibular joint?

  • Correct answer

    Reciprocal clicking on opening and closing

  • Sudden limitation of opening to about 25 mm with deviation toward the affected side

  • Crepitus with radiographic flattening of the condyle

  • Continuous pain in the masseter that gets worse on palpation

This question is one of 15 in AFK practice: Oral surgery, trauma and orofacial pain. Test yourself on all of them.

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Explanations

  • In disc displacement with reduction, the disc pops back onto the condyle on opening and slips off again on closing, which produces a reciprocal click. Sudden limited opening with deflection toward the affected side suggests displacement without reduction (closed lock).

    Source: Okeson, Management of Temporomandibular Disorders and Occlusion — oneguy

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