*2.3. Surgical Procedure*

All surgical procedures were performed utilizing a uniform implant design (Univers Reverse; Arthrex Inc., Naples, FL, USA). A deltopectoral approach was used in all cases. Subscapularis repair was based on surgeon preference. On the glenoid side, this system provides a 36, 39, or 42 mm glenosphere with neutral, 4 mm lateralized, or 2.5 mm inferior eccentric options. Inclination angle, glenosphere size and offset were based on intraoperative deltoid tension, implant stability, and notching according to surgeon's preference. On the humeral side, the prosthesis has a modular cup which allows the surgeon to implant the component with either 135◦ or 155◦ of inclination. All humeral components were implanted by press-fitting. No patients required bone grafting.
