Background: Collateral ligament injury of the metacarpophalangeal joint of the fingers is underreported in the literature and widely underestimated by the medical community. Here, the authors present results from a large series of patients and review factors influencing success of surgery. Methods: The authors performed a retrospective study of 46 patients who underwent surgical fixation of the metacarpophalangeal collateral ligament using bone anchor in an acute or chronic setting. The diagnosis was predominantly clinical, based on laxity testing of the joint. The authors collected demographic data and intraoperative findings and postoperative results. Results: Following surgery, with a median follow-up of 17 months, all patients presented with a stable joint and complete resolution of pain. The mean flexion of the metacarpophalangeal joint was 77.11 degrees, and mean extension was 0.84 degrees. The authors measured the injured grip strength at a mean of 88.52 percent of the opposite hand, and the mean Quick Disabilities of the Arm, Shoulder and Hand questionnaire score used to evaluate disability was 9.56 on a scale of 100 (with 100 being complete disability). Conclusions: Surgical treatment of metacarpophalangeal collateral ligament rupture of the fingers is a safe technique that gives reproducible positive results in terms of mobility, strength, and disability scale score. The authors’ results show that anchoring of the ligament should be performed even with prolonged time from injury to surgery.

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