Figure 1

Miniaci method for frontal plane correction. (A) Line 1 represents the planned Mikulicz line for the postoperative correction extending from the center of the hip through the center of the knee, past the ankle. Line 2 connects the osteotomy hinge point (H) with the center of the ankle. The H point was located on the medial cortex of the proximal tibia at the lower level of tibial tuberosity. With H point as the center and the length of line 2 as the radius, an angular arc is drawn from the center of the ankle to the intersection of line 1. Line 3 connects the H point with the intersection of line 1. The angle formed by lines 2 and 3 is the planned correction angle (A). (B) Angle A is now drawn on the prospective site of the osteotomy on the AP radiographs of the knee joint. The distance (d) of the two lines at the lateral cortex was measured as the osteotomy wedge base (magnification factor must be considered).