Figure 1.

Radiologic measurements of acromion–deltoid tuberosity (ADT) distance, center-of-rotation (COR) distance, and lateral humeral offset (LHO) on preoperative (A) and postoperative (B) shoulder anteroposterior radiographs. The ADT distance is the distance from the inferolateral acromion tip to the apex of the deltoid tuberosity. The COR is drawn at the center of a circle that completely fits around the humeral head preoperatively (A) and glenosphere postoperatively (B). Then, the COR distance is determined as the length from the most prominent superolateral margin of the greater tuberosity to the COR. LHO is the distance between the line perpendicular to the horizontal line on the radiograph that abuts the lateral tip of the acromion and the line perpendicular to the most prominent margin of the greater tuberosity.