Subpectoral Tenodesis Research Articles

Proximal Biceps Tendon

The long head of the biceps tendon is a known pain generator of the shoulder. There are numerous pathologic entities that may affect this tendon, including tendonitis, partial tearing, and subluxation. These conditions are often associated with rotator cuff tears, especially those involving the subscapularis. Operative interventions include tenotomy and tenodesis. Tenodesis can be preformed in a proximal or distal location. Subpectoral tenodesis may have a lower recurrence rate than proximal-based techniques.

Interference Screw Versus Suture Anchor Fixation for Subpectoral Tenodesis of the Proximal Biceps Tendon: A Cadaveric Study

The purpose of this study was to compare the biomechanical properties of 2 fixation methods for subpectoral proximal biceps tenodesis. In 9 matched pairs of cadaveric shoulders, an open subpectoral tenodesis was performed 1 cm proximal to the inferior border of the pectoralis major tendon by use of either an 8 x 12-mm Bio-Tenodesis screw (Arthrex, Naples, FL) with No. 2 FiberWire sutures (Arthrex) or a 5.5-mm Bio-Corkscrew double-loaded suture anchor (Arthrex) with No. 2 FiberWire sutures. The specimens were dissected and mounted in a material testing machine. Cyclic loading (20 to 60 N, 100 cycles, 0.5 mm/s, 5-N preload) was performed, followed by an unloaded 30-minute rest, a 5-N preload, and a load-to-failure protocol (1.25 mm/s) with a 100-lb load cell. Ultimate load (in Newtons), stiffness (in Newtons per millimeter), and modes of failure were recorded. Data were analyzed by use of paired t tests and Wilcoxon signed rank tests. Proximal biceps tenodeses with Bio-Tenodesis screws had a significantly higher mean load to failure (169.6 +/- 50.5 N; range, 99.6 to 244.7 N) than those with Bio-Corkscrew suture anchors (68.5 +/- 33.0 N; range, 24.2 to 119.4 N) (P = .002). Bio-Tenodesis screws also had a significantly higher stiffness (34.1 +/- 9.0 N/mm; range, 20.6 to 48.9 N/mm) than Bio-Corkscrews (19.3 +/- 10.5; range, 5.9 to 32.9 N/mm) (P = .038). In this cadaveric study the Bio-Tenodesis screw showed a statistically significantly higher load to failure and significantly higher stiffness than the Bio-Corkscrew anchor when used for tenodesis of the proximal biceps tendon in a subpectoral location. Biomechanical comparison of these 2 fixation techniques provides information on stiffness and load to failure of alternate fixation methods.

Biceps Tendon and Superior Labrum Injuries

Although the anatomy of the biceps tendon and the restraining structures within the rotator interval are well defined, biceps function is not clearly understood. Biceps pathology is often associated with rotator cuff disease. Although careful clinical examinations along with diagnostic testing can accurately identify patients with biceps pathology, arthroscopy is extremely valuable in the diagnosis and treatment of biceps pathology. Surgical treatment options for biceps pathology include decompression, débridement, tenotomy, and tenodesis. Several factors must be considered in this decision. The most important factors when deciding between tenodesis or tenotomy are the activity expectations of the patient, cosmesis, patient compliance, associated pathology, and patient age. Those older than 60 years tolerate a tenotomy with the fewest adverse effects. Various arthroscopic tenodesis techniques exist, including an interference screw in bone, suture anchor fixation, and suture to adjacent tissue fixation. An open subpectoral tenodesis is another option and appropriate for a retracted biceps rupture or when the biceps disease extends distal to the bicipital groove. A superior labrum anterior and posterior (SLAP) lesion at the attachment site of the biceps tendon to the superior glenoid labrum is uncommon. Clinically significant SLAP lesions are found in about 5% of all shoulder arthroscopies and may be mistaken for normal superior labral variations. Clinical examinations and diagnostic imaging tests for SLAP lesions are often unreliable, and the ultimate diagnostic confirmation is made by arthroscopy. Surgical treatment is focused on the reattachment of the unstable biceps-labral complex.