What Causes Joint Crepitus?

Osteoarthritis

Joint sounds tend to increase as individuals get older. This effect occurs when aging causes the cartilage to wear away in joints, leaving bone edges more exposed, which may catch on tendons or ligaments. Osteoarthritis, the bone degeneration that occurs from normal wear and tear on joints over time, can also lead to louder or more frequent joint noise. Joints may also develop small, bony overgrowths called spurs that make smooth movement of the joint more difficult. Because of their constant weight-bearing function, knees often develop osteoarthritis problems, with more frequent crunching sounds. Shoulders often make the most noise during movement, because the joint contains many bones that are involved in the rotation of the arm.

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