ABSTRACT
A dorsal luxation of the PIP joint can cause damage to the volar plate and collateral ligaments. The luxation can be open. Untreated subluxation leads to chronic instability and/or a swan neck deformity. X-rays in PA and lateral direction before and after reposition. With a stable joint after reposition, three weeks of plaster enclosing the DIP joint is sufficient. X-rays in PA and lateral direction to exclude avulsion fractures. It usually involves the ulnar collateral ligament, sometimes in combination with a volar plate avulsion. The former concerns a rupture of the ulnar collateral ligament, while the latter involves a stretching of the ligament due to repetitive movements. The MCP joints of the fingers have a possibility of a dorsal luxation, whereby the head of the os metacarpal is fixed between the flexor tendons, the volar plate and the intrinsic musculature.
