A common clinical sign of TMJ dysfunction detected on examination includes?

• A. Joint sounds such as clicking or crepitus
• B. Tooth decay
• C. Nasal congestion
• D. Hair loss

Answer: (A)

TMJ dysfunction is most commonly detected on exam by audible joint noises during jaw movement, such as clicking or crepitus. These sounds reflect abnormal movement of the TMJ structures—often due to disc displacement or rough joint surfaces—as the mouth opens and closes. That direct sign is a classic local finding when clinicians assess jaw function. By contrast, tooth decay is a dental issue of the teeth themselves, nasal congestion involves the nasal passages, and hair loss is unrelated to TMJ mechanics, so they wouldn’t be expected signs on TMJ examination.