Arthroscopic arthrodesis of the thumb metacarpophalangeal joint: An anatomical feasibility study.

Conventional open arthrodesis for the thumb metacarpophalangeal joint provides excellent results but can incur complications. The aim of this study was to evaluate the feasibility and safety of resecting the thumb metacarpophalangeal articular surfaces via an arthroscopic approach or a percutaneous approach under fluoroscopic control. This cadaver study was carried out on 14 thumbs. Ten were operated on arthroscopically, and four percutaneously under fluoroscopic control. The efficacy and safety of the respective procedures were evaluated after dissecting soft tissue and opening the joint. Following 2 insufficient resections using the arthroscopic technique, the procedure was modified, providing satisfactory resection in 80% of cases overall and no tendinous or neurovascular lesions. Percutaneous resection under fluoroscopy did not yield satisfactory results, especially on the volar part of the metacarpal articular surface. We believe these results would justify comparative clinical studies to evaluate fusion of the thumb metacarpophalangeal joint with arthroscopic joint surface resection followed by percutaneous fixation. LEVEL OF EVIDENCE: IV.