Meniscus Allograft Interpositional Arthroplasty With Elastic Intramedullary Bioabsorbable Pin Fixation for Proximal Interphalangeal Joint Contracture.

Advanced proximal interphalangeal (PIP) joint contracture presents a surgical challenge, particularly in patients who require preservation of joint motion. Arthrodesis provides reliable pain relief, but eliminates motion, whereas implant arthroplasty may be associated with mechanical complications and implant failure. We report a case of severe degenerative PIP joint contracture treated with meniscus allograft interpositional arthroplasty combined with intramedullary bioabsorbable pin fixation. Preoperatively, the joint was fixed at 60° of flexion. At 1-year follow-up, active range of motion improved to 20° to 105°, with passive motion of 0° to 115°. Functional outcomes improved, with the Quick Disabilities of the Arm, Shoulder, and Hand score decreasing from 56.8 to 15.9 and the visual analog scale pain score improving from 7 to 1. Radiographs demonstrated maintained joint alignment without graft migration or subluxation. This case demonstrates that meniscus allograft interposition with intramedullary bioabsorbable fixation may provide a motion-preserving reconstructive option for selected patients with advanced PIP joint contracture.