Palpation of the temporomandibular joint (TMJ) is positive if which finding is present, indicating TMJ dysfunction?

• A. Normal movement of the TMJ
• B. Audible or palpable snapping or clinking of the TMJ's
• C. Pain with jaw movement only on one side
• D. Limited mouth opening without sounds

Answer: (B)

The key idea is that TMJ dysfunction often shows a characteristic joint sound or sensation during movement. The jaw joint has an articular disc that can become displaced, so as you open and close, the disc may snap back into place, producing an audible or palpable click or clink. This snapping is a classic sign of abnormal movement within the TMJ, indicating dysfunction. Normal, healthy TMJ movement is smooth and quiet, so the presence of a snap points to an issue rather than normal function. Pain on one side or limited mouth opening can occur with TMJ problems as well, but the distinctive positive finding when palpating is the audible or palpable snapping or clinking.