Abstract
To report the technique and outcome of subscapularis (SSC) lengthening in shoulder arthroplasty. When external rotation measures less than 20 degrees, a coronal subscapularis lengthening is performed. This utilizes the interval between the anterior shoulder capsule and subscapularis to titrate the correct amount of anatomic length. Average preoperative passive ER was -2 degrees. Average postoperative ER was 48 degrees. Belly press was graded as normal in 13 pts, mild in 12 pts, and poor in 2 pts. Subscapularis tendon lengthening provides a large surface area for tendon healing and allows anatomic length to be restored. Subscapularis lengthening may preserve a better length-tension relationship of the SSC muscle in shoulders with significant IR contracture undergoing shoulder arthroplasty.
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