Fig. 3

A, B Osteotomy of posterior femoral condyle in total knee arthroplasty. A Gap balancing technique: with tibial plateau as the benchmark, the "buckling gap" of the rectangle was truncated by gravity, distraction and other methods. B Measuring osteotomy technique: posterior femoral condyle osteotomy was performed perpendicular to the AP axis or at a 3° Angle with the connecting line of the posterior femoral condyle