Figure 1: The three-dimensional geometries of the polyethylene inserts from eight different reverse shoulder arthroplasty systems reconstructed from microcomputed tomography scanning. (a) Arthrex, (b) Biomet, (c) Depuy, (d) Exactech, (e) Tornier fl ex shoulder system reverse, (f) tornier aequalis reversed, (g) Zimmer anatomical shoulder inverse/reverse, (h) Zimmer trabecular metal reverse shoulder