The distal radioulnar joint capsule is the fibrous sleeve enclosing the DRUJ, reinforced anteriorly and posteriorly by the radioulnar ligaments of the TFCC. It allows forearm rotation while maintaining ulnocarpal and radioulnar relationships.
Provides the DRUJ joint containment, allows the forearm rotation arc of 150-180 degrees, is reinforced by the TFCC for DRUJ stability, and is the capsule that contracts in DRUJ stiffness after fractures.
DRUJ capsular contracture after distal radius fractures produces forearm rotation restriction. The dorsal and volar capsular contractures limit pronation and supination respectively. Arthroscopic DRUJ capsular release restores rotation in post-traumatic stiffness.
Post-traumatic fibrosis of the DRUJ capsule producing forearm rotation restriction, managed by prolonged physiotherapy or arthroscopic capsular release when conservative treatment fails.
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