Figure 4. Technique of Z-osteotomy - Z shape is marked on the proximal tibia by drill holes which are connected by an osteotome to complete the osteotomy (Shown in red line).

Wedge of bone is removed (Shown in blue shape) and the distal tibia is derotated and then re-engaged in the corrected position. The red line shown on the fibula is the fibular osteotomy.