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Reverse shoulder arthroplasty for the treatment of primary glenohumeral osteoarthritis in patients with a biconcave glenoid without rotator cuff insufficiency can result in excellent clinical outcomes. Reverse shoulder arthroplasty is a viable surgical option to solve both the problem of severe static posterior glenohumeral instability and severe glenoid erosion.

Glenoid issues have a substantial effect on humeral bone in shoulder arthroplasty. Polyethylene wear appears to be associated with the development of osteolysis of the proximal part of the humerus after total shoulder arthroplasty. With our implants, stress-shielding was only observed with uncemented humeral stems. The uncemented and cemented stem designs analyzed in this study appeared comparable and can be recommended for clinical use.

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