Additional Soft Tissue Procedure of Arthroscopic Partial Distal Scaphoidectomy for Scapho-Trapezio-Trapezoid (STT) Osteoarthritis

Etiology of isolated scapho-scaphoidectomy. When the resection height was larger than 3mm, postoperative functional outcomes revealed suboptimal with an increase of carpal extension in the scaphoid and lunate. 

We have added soft tissue procedure to prevent further extension of the proximal carpal row in the mobile type STT-OA. The procedure included the use of flexor carpi radialis tendon to tether the scaphoid extension or the use of extensor retinaculum to hold dorsal surface of the capitate. The indication of these additional soft tissue imbrications is mobile type STT-OA, which showed a lunate extension of larger than 15 degrees and/or midcarpal clunking during midcarpal shift test. 

This presentation will show our treatment strategy for STT osteoarthritis, surgical technique and clinical results.