Fig. 5

Upper and lower limits of the distance from the UB-ECH to UB-PMT. The green line indicates the distance when the calcar screw was inserted closely to the inferior border of the humeral head. The red line indicates the distance when the calcar screw was inserted 12 mm above the inferior border of the humeral head. Zero line means that UB-ECH was the same level as UB-PMT. When UB-ECH was lower than UB-PMT, distances were presented with a minus. Ideal plate position (Dashed line) should be placed 3 mm above the inferior border of the humeral head