During a bite test, pain on the opposite side indicates involvement of which structure?

• A. Muscular dysfunction
• B. Nerve entrapment
• C. Vascular disease
• D. TMJ joint pathology

Answer: (D)

When you test a unilateral bite, the load from one side of the mandible transmits across the bite and stresses the opposite temporomandibular joint. If pain is felt in the joint on the opposite side, it points to joint pathology there—such as disc displacement or other TMJ degenerative/inflammatory changes—since the joint is being stressed during the bite even though the bite occurred on the other side. Muscular pain tends to be localized to the muscles on the biting side and is usually reproduced by palpating those muscles, while nerve or vascular issues don’t typically produce this contralateral joint pain pattern during a bite test.