Biomechanical Consequences of Glenoid and Humeral Lateralization in Reverse Total Shoulder Arthroplasty.

Lateralization is achievable at both the glenoid and humeral sides but has different effects, therefore lateralized implant options should be selected according to patients' needs. Lateralization is an effective strategy for reducing adduction notching while increasing ER capability. Thicker glenospheres only affected humeral lateralization. The centric humeral tray would be selected for less distalization to avoid over-lengthening, whereas an eccentric humeral tray is the most effective for distalization and medialization in reducing abduction notching to the acromion and for patients with pseudoparalysis.