PARTIAL AND COMPLETE DISTAL BICEPS TENDON RUPTURES
2003
Aim: The biceps brachii is an important elbow flexor and is the main supinator of the forearm. Avulsion of its distal tendon insertion is an uncommon injury and even more uncommon is the partial tear of this tendon. The rupture typically occurs at its attachment to the radial tuberosity. Nonoperative treatment of these injuries has been described, but significant weakness in flexion and supination or persistent pain may occur. Most authors recommend acute anatomic repair to improve function or relieve pain. Material and Method: Twenty-five ruptures of the distal biceps tendon were operated at our institution from 1992 to 1997. Twenty-three of the patients were male and 2 female. The dominant extremity was involved in 21 patients. Their average age was 48 years (range, 30–59). Eighteen ruptures were complete, 8 of them were acute, while 10 were chronic, as were the 7 partial ruptures. Three patients with complete rupture and all the patients with partial rupture had a MRI. In 2 chronic patients an anatomic repair was impossible and they were treated with a biceps-to-brachialis transfer. These patients were not included in the final follow-up. All other tendons were repaired anatomically through use of a single anterior incision and bone suture anchors. Follow-up averaged 36 months (range, 12–53 months). At final follow-up subjective and objective data were collected. Patients were questioned about their activity level, job status, and satisfaction at outcome. Elbow range of motion, strength and power were compared with those for the uninjured side while each value was adjusted for dominance and expressed as a percentage of the uninjured side. Results: All patients returned to their preinjury level of activity and employment by 6 months after surgery. All patients reported that they were satisfied with the result and would undergo the surgery again. The entire group of patients averaged 9.8% more flexion strength and 2.4% less supination strength for the repaired elbow that for the uninvolved elbow. Range of motion was normal in 20 patients. Three patients lacked 10° of extension and one of them lacked 10° of pronation. No patient experienced transient or permanent nerve deficit. None of the patients complained of pain or tenderness. There was no evidence of heterotopic ossification or change in the position of the suture anchors. Conclusion: The one incision technique with bone suture anchors is a safe and reliable technique for the treatment of complete or partial distal biceps tendon ruptures with very good results referring to restoration of flexion and supination strength and minimal complication rate.
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