What are the two main TMJ components you should assess when evaluating occlusion-related symptoms?

• A. The condyle-disc complex and the articular eminence
• B. The meniscus and the zygomatic arch
• C. The mandibular canal and the articular capsule
• D. The coronoid process and the articular disc

Answer: (A)

When assessing occlusion-related symptoms, focus on how the jaw joints move, which centers on two structures. The first is the condyle-disc complex, meaning the mandibular condyle together with the interposed articular disc. Their coordination allows normal rotation and forward translation of the jaw. If the disc is displaced, or if the condyle’s movement is restricted, it can change how teeth come together, create bite interferences, and produce joint sounds or pain.

The second is the articular eminence, the bony slope of the temporal bone that the condyle moves against during opening and various movements. Its height and shape guide the path of mandibular motion and influence the amount of anterior translation and the stability of the joint. When the eminence is abnormal, it can alter movement patterns and contribute to occlusal contacts that don’t settle evenly, potentially leading to symptoms.

Together, these two components determine how the jaw moves in relation to the teeth, making them the key structures to assess for occlusion-related TMJ symptoms. The other structures listed don’t govern the dynamic movement and guidance of the jaw in the same primary way.