The pisotriquetral joint ligaments encapsulate the articulation between the pisiform (embedded in the FCU tendon) and the triquetrum, providing the joint containment for this sesamoid-bone articulation.
Provide the fibrous containment of the pisotriquetral joint, allow limited sliding movement of the pisiform on the triquetrum, transmit FCU force to the pisiform, and are the ligaments involved in pisotriquetral arthritis.
Pisotriquetral arthritis produces ulnar-sided wrist pain reproduced by compression of the pisiform against the triquetrum (pisotriquetral grind test). Corticosteroid injection into the joint provides diagnostic confirmation and temporary relief. Pisiformectomy (pisiform excision) definitively treats refractory pisotriquetral arthritis.
Ligamentous and cartilage degeneration of the pisotriquetral joint producing ulnar wrist pain with a positive pisotriquetral grind test, managed by joint injection or pisiformectomy.
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