Minoda Y, Sugama R, Ohta Y, et al. - This study was conducted to examine the association between the amount of additional bone resection in the distal femur and the increase in the extension joint gap in total knee arthroplasty (TKA). Researchers assessed 50 knees undergoing TKA for varus osteoarthritis. They set the femoral trial component models before implantation, and the extension joint gap was assessed applying a tensor device that had a shape identical to that of the fixed-bearing tibial insert. In the distal femur, the amount of additional bone resection was not equal to the increase in the extension joint gap. It was shown that additional bone resection of 4 mm in the distal femur only increased the extension joint gap by a mean of 2 mm.