Authors:

Maximilian Petri, Joshua A Greenspoon, Peter J Millett

Abstract:

Massive irreparable rotator cuff tears involving the posterosuperior rotator cuff are challenging to treat. Many treatment options exist, including debridement, partial rotator cuff repair, patch- augmented rotator cuff repair, bridging rotator cuff reconstruction with a graft, latissimus dorsi tendon transfer, and superior capsule reconstruction. If joint space narrowing with cuff tear arthropathy is present or when the subscapularis is also irreparable, reverse total shoulder arthroplasty is indicated.

The shoulder capsule is an important static stabilizer of the glenohumeral joint, with the anterior capsule maintaining anterior glenohumeral stability whereas the posterior capsule provides posterior stability. Because the superior capsule attaches to a large area of the greater tuberosity, it is often concomitantly torn with posterosuperior rotator cuff tears. Biomechanically, it has been shown that superior capsular defects increased glenohumeral translation in all directions, particularly with superior translation at 5 and 30 of 5 abduction. On the other hand, reconstruction of the superior capsule with a collagen graft, attached medially to the superior glenoid and laterally to the greater tuberosity, restored superior translation to physiological conditions in a biomechanical cadaveric model.

One study has reported on clinical outcomes after superior capsule reconstruction. Mihata reported clinical outcomes of 23 patients undergoing superior capsule reconstruction with a fascia lata autograft. After a minimum follow-up period of 2 years, all average clinical outcomes scores significantly improved. The American Shoulder and Elbow Surgeons score improved from 23.5 preoperatively to 92. post-operatively, and shoulder muscle strength significantly improved as well. The acromiohumeral distance significantly increased by 4.1 mm after surgery. Post-operative magnetic resonance imaging showed that 83% of the patients had intact reconstructions and no progression of muscle atrophy. The results of Mihata indicate that superior capsule reconstruction may be a promising tool to manage massive irreparable rotator cuff tears. Video 1 demonstrates our preferred technique for arthroscopic superior capsule reconstruction.

For the complete study: Arthroscopic Superior Capsule Reconstruction for Irreparable Rotator Cuff Tears