Why repair the subscapularis? A logical rationale.

Tears of the subscapularis tendon are now more frequently recognized and are often associated with tears of the posterosuperior rotator cuff tendons. This has been facilitated by arthroscopic approaches, and repair techniques have been developed. In the setting of a rotator cuff repair, when a subscapularis tendon tear is found in continuity with a supraspinatus tendon tear, it is essential to recognize how the repair of both tendon tears can influence the overall security of the entire repair construct. When a repairable subscapularis tendon tear is left unrepaired, the function of the subscapularis muscle will be lost. In addition, the posterosuperior rotator cuff tear will be more difficult to repair, and it will be less securely repaired. When the subscapularis tendon is repaired initially, the posterosuperior rotator cuff repair can be more easily and more reliable achieved.