Fig. 2

a Depicting the mechanical axis of femur (Line AB), and a tangential line to the distal femoral articular surface (Line CD) and preoperative mLDFA (angle ABC), 92° that means 2° varus correction in femur is required. b Depicting the femoral mechanical axis (Line AB), and a line perpendicular to mechanical axis, a line tangential to at least one distal femoral condyle, and in this case lateral distal femoral condyle, (Line CD). Line CD is 0.2 cms away from medial femoral condyle, meaning bone cut from medial femoral condyle must be 0.2 cm less than lateral femoral condyle. Line GB is trajectory for intramedullary road and this line makes 82° angle (angle GBC), which means VCA of 8°. c Intra-operative photograph showing thickness of the bone resected from the medial femoral condyle, 4.5 mm. d Intra-operative photograph showing the thickness of the bone resected from the lateral femoral condyle, 6 mm (planned difference of thickness of bone resection from medial and lateral femoral condyle was 2 mm, here we could get 1.5 mm difference). e Post-operative LLR (showing only knee). Depicting the mLDFA, angle ABC, 90° (planned femoral component position)