Wear-induced loss of mass in reversed total shoulder arthroplasty with conventional and inverted bearing materials

The results of this study indicate that the gravimetric polyethylene wear in the estimated life-time is very low and not significantly different between both material configurations. However, the polyethylene abrasion due to mechanical notching in the configuration with polyethylene Inlay is by far more important than any gravimetric wear. These results support the continued use of inverted bearings in reversed total shoulder arthroplasty.