What does crepitus indicate in TMJ examination?

What does crepitus indicate in TMJ examination?

• A. Normal variation
• B. Muscle hyperactivity
• C. Degenerative changes or advanced joint involvement
• D. Vascular insufficiency

Answer: (C)

Crepitus in the TMJ reflects degenerative changes or advanced involvement of the joint. When the jaw moves, roughened articular surfaces or disc derangement can produce a crackling or grating sensation or sound as the condyle slides past the articular surfaces. This is a sign of structural joint pathology rather than a primary muscular issue or vascular problem. It’s not considered a normal variation; it points to conditions like osteoarthritis or other degenerative changes within the TMJ, which helps explain why there may be reduced range of motion or pain with movement.

Crepitus in the TMJ reflects degenerative changes or advanced involvement of the joint. When the jaw moves, roughened articular surfaces or disc derangement can produce a crackling or grating sensation or sound as the condyle slides past the articular surfaces. This is a sign of structural joint pathology rather than a primary muscular issue or vascular problem. It’s not considered a normal variation; it points to conditions like osteoarthritis or other degenerative changes within the TMJ, which helps explain why there may be reduced range of motion or pain with movement.