3.1.1. Preoperative Planning

Our preference is to plan the humeral head osteotomy at 2–3 mm proximal to the transition between the rotator cuff attachment and the humeral head. Some surgeons prefer performing the osteotomy at fixed angles, typically 135 degrees of inclination and 30 degrees of retroversion. Others prefer to make the cut at the exact location of the anatomic humeral neck. In such a case, it is possible that the stem will end up oriented inside the canal in varus or valgus, and the implications of malalignment in anatomic arthroplasty are less substantial, provided the humeral head is reconstructed anatomically.

**Figure 6.** Contemporary platform of a short-stem humeral component designed for proximal fixation and loading.
