All of the following are requirements for SCR except:

The correct answer highlights that an irreparable subscapularis tear is not a requirement for Superior Capsular Reconstruction (SCR). SCR is primarily indicated for patients with large, irreparable rotator cuff tears that specifically affect the supraspinatus or both supraspinatus and infraspinatus muscles. The subscapularis is a different component of the rotator cuff and its condition does not directly fall under the criteria for SCR, which is designed to address superior capsular deficiencies in the presence of intact or functional anterior structures.

The other requirements focus on ensuring suitable conditions for SCR to be effective. For example, having a functional deltoid and trapezius is crucial, as these muscles are necessary for shoulder movements that compensate for the loss of the rotator cuff functions. Similarly, the presence of minimal to no glenohumeral arthritis is essential, as significant arthritis could complicate the surgical outcome and impact the overall functionality of the shoulder post-operatively.