The Use of a Third Metacarpal Base Osteoarticular Flap for Treatment of Metacarpophalangeal Joint Traumatic Defects

PurposeTo describe the use of a pedicled osteoarticular flap harvested from the base of the third metacarpal for the treatment of traumatic defects of the metacarpophalangeal (MCP) joints.MethodsFrom February 2006 to January 2008, we included in the study 15 patients with posttraumatic defects of the MCP joints. The mean age of the patients was 35 years. The injured MCP joints were located in the thumb (n = 6) and index (n = 4), middle (n = 4), and ring fingers (n = 1). Of the 15 patients, 10 presented with acute injuries and 5 with old injuries. At follow-up, we assessed active motion and pinch strength and compared all measurements with those from the opposite hand. In patients with old MCP joint injuries, we also compared preoperative and postoperative motion and pinch strength. We assessed hand function using the Disabilities of the Arm, Shoulder, and Hand questionnaire.ResultsAt the final follow-up (mean, 28 mo), the mean motion arc of the reconstructed MCP joints and the opposite joints was 46° and 91°, respectively, and the mean pinch strength of the injured and opposite sides was 5.4 and 7.1 kg, respectively. For the 5 patients with old injuries to the fingers, the mean preoperative and postoperative motion arc was 2° and 43°, and the mean preoperative and postoperative pinch strength was 1.6 and 5.3 kg, respectively. The mean Disabilities of the Arm, Shoulder, and Hand score of the entire patient series was 9, whereas the mean preoperative and postoperative scores of the 5 patients with old injuries were 44 and 17, respectively.ConclusionsThe use of a pedicled osteoarticular flap harvested from the base of the third metacarpal is a reliable technique for the treatment of traumatic defects of the MCP joints.Type of study/level of evidenceTherapeutic IV.