Glenoid reaming. Reaming is used to create a single glenoid concavity. Rather than striving to “normalize” the glenoid version (A), we prefer to preserve glenoid bone stock, even if it means accepting some glenoid retroversion (B). (Reproduced, with modification, from: Matsen FA III, Lippitt SB. Shoulder surgery: principles and procedures. 1st ed. Philadelphia: Saunders; 2004. Principles of glenoid arthroplasty. Reproduced with permission of Elsevier.)