Fig. 4

a This apex of L-shaped osteotomy is placed on the line connecting the transverse point and the apex of the fibula head, and a K-wire is inserted into the apex point of L-shaped osteotomy line; Dotted line: L-shaped osteotomy line. b The osteotomy to the intercondylar eminence is performed with a chisel following the fluoroscopic guidance. c The posterior cortical bone is cut following the fluoroscopic lateral view in a crossed-leg position. d Valgus correction is performed using the spreader. Two K-wires are inserted from the lateral side of the tibia plateau before the valgus correction