Lateralized versus nonlateralized reverse total shoulder arthroplasty

Abstract

<jats:p> Throughout the history of reverse total shoulder arthroplasty, the extent of lateral offset has changed considerably from “too lateral” to “too medial” and has been lately swinging back towards a point somewhere in between. Nonlateralized designs minimize shear forces on the glenoid and decrease force required by the deltoid. Glenoid lateralization decreases impingement and scapular notching and improves range of motion. Humeral lateralization achieves a more anatomic position of the tuberosities while maintaining a nonlateralized center of rotation. Several factors play a role in choosing the extent of lateral offset and method of lateralization. </jats:p>

Subscapularis repair in reverse total shoulder arthroplasty: a systematic review and descriptive synthesis of cadaveric biomechanical strength outcomes

“…Indications for repairing the subscapularis also relate to glenosphere positioning. 2 Subscapularis repair increases stability when using humeral and glenoid components that are medialized. 36 When the glenosphere is lateralized, there is increased stability from horizontal deltoid compression, and subscapularis repair may not be required.…”