Marking the center of the glenoid center with cautery. The point midway between the anterior and posterior aspects of the glenoid and slightly above the superior/inferior midpoint is marked with cautery. (Reproduced, with permission of Elsevier, from: Matsen FA 3rd, Clinton J, Rockwood CA Jr, Wirth MA Lippitt MA. Glenohumeral arthritis and its management. In: Rockwood CA Jr; Matsen FA 3rd; Wirth MA; Lippitt SB, editors. The shoulder. 4th ed. Philadelphia: Saunders; 2009.)