COMPARISON OF TENODESIS VERSUS TENOTOMY OF THE LONG HEAD OF THE BICEPS FOR UNREPAIRABLE ROTATOR CUFF TEARS

Abstract

Purpose of the study: Injury to the long head of the biceps is frequently associated with massive rotator cuff tears leading to pain and functional impotency. Tenotomy of the long biceps is a validated option for unrepairable cuff tears, but can lead to an unsatisfactory aesthetic result (Popeye sign) or functional impairment (loss of strength). The objectives of this study were to confirm the clinical efficacy of intra-articular resection of the long head of the biceps, to study the radiographic evolution, to evaluate aesthetic and functional outcome of tenotomy procedures and to compare them with those of tenodesis with an interference screw, an alternative to tenotomy.

Materials and Methods: We conducted a retrospective analysis of 151 patients presenting an unrepairable rotator cuff tear. Tenotomy of the long head of the biceps was performed in 63 patients and tenodesis of the long head of the biceps using an interference screw in 88. Acromioplasty was also performed in 21 shoulders with the resection of the long head of the biceps. All patients were reviewed by an independent investigator at mean 63 months follow-up.

Results: Patient satisfaction was good or very good for 92%. The absolute Constant score improved from 47.4±13.8 points preoperatively to 70.8±12.2 points at last followup for the whole series, increasing on average 24.4 points (p< 0.05). There was no statistical difference for the Constant score between tenotomy and tenodesis. The subacromial space decreased 2±2.3 mm on average (p< 0.05). Degeneration of the glenohumeral joint was noted in 12% of shoulders at last follow-up. Retraction of the long head of the biceps (Popeye sign) were noted in 31% of patients with tenotomy and in 10% of those with tenodesis (p< 0.001). There were twice as many cases of brachial biceps cramps in the tenotomy group (24%) than in the tenodesis group (12%). Muscle force for elbow flexion in the supination position was greater in the tenodesis group than in the tenotomy group (p< 0.05).

Conclusion: Arthroscopic tenotomy or tenodesis of the long head of the biceps are valid therapeutic options for unrepairable rotator cuff tears. The efficacy of the two techniques is the same in terms of the objective outcome (Constant score) but tenodesis limits the aesthetic sequelae and preserves elbow flexion and supination force.