Hemihamate arthroplasties in pilon fractures: a modified approach and experience in 30 patients.

Abstract

Hemihamate arthroplasty is an established method of managing difficult Pilon fractures of the proximal interphalangeal (PIP) joint. We present our experience in 30 patients, whose injuries were further complicated by severe comminution and late presentations. Several modifications were utilized, including preoperative distraction, use of smaller size grafts and functional release of collaterals. The average follow-up period was 28 months (range 18 to 28). Postoperatively, the average range of flexion at the PIP joint improved from 30° (range 20° to 45°) preoperatively to 104° (90° to 110°) at the final follow-up. The average extension lag was 6° (0° to 20°). Five patients required secondary procedures and no patient had a recurrent dorsal dislocation. We propose these modifications in the use of hemihamate arthroplasty for the management of difficult PIP joint fractures.<b>Level of evidence:</b> IV.