Clinical Presentation Of Temporomandibular Disorder (TMD) Practice Test

Which finding would most support a disc displacement diagnosis?

Widespread headaches. Localized ear pain with no jaw movement issues. Joint noises with deflection during jaw movement. Only muscle tenderness with normal joint function.

Correct Answer:

Joint noises with deflection during jaw movement.

Explanation:

Disc displacement in the TMJ is most suggested when there are audible joint noises during movement and the jaw path deviates (deflects) as it opens or moves. The displaced disc interferes with the smooth tracking of the condyle, so you often hear a click or pop and the jaw doesn’t move straight but swings to one side. This combination directly reflects an intra-articular problem where the disc is out of place, making it the strongest indicator for disc displacement. Other findings like generalized headaches, ear pain without jaw movement issues, or muscle tenderness with a normal joint often point to non-dislocation problems such as myofascial pain or referred symptoms, not the disc itself.

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