Fig. 7-E.

Posterior drop back. If the humeral head drops back out of the glenoid with forward elevation, an eccentric head prosthesis, a thicker head, a rotator interval plication, or a combination of these may be required for stability. (Reproduced, with modification, from: Clinton J, Warme WJ, Lynch JR, Lippitt SB, Matsen FA. Shoulder hemiarthroplasty with nonprosthetic glenoid arthroplasty: the ream and run. Tech Shoulder & Elbow Surg. 2009 Mar;10[1]:43-52. Reproduced with permission of Wolters Kluwer Health.)