Fig. 1

The procedure of one-stage TKA and femoral osteotomy. a Recurvatum deformity on femur. b A wedge osteotomy was performed at the center of the deformity. c With the separate bone segments stringed together and correctly aligned, the femoral medullary canal was reamed until the cortex of isthmus was engaged. d Adequate correction was confirmed with fluoroscopy. e Bridging the osteotomy site with an intramedullary alignment rod, standard bone cut at distal femur was performed