Ro DH, et al. - Considering the possibility of achieving functional benefit via targeting residual varus alignment in total knee arthroplasty in preoperative varus patients, researchers allocated bilateral TKA patients into residual varus (3° ± 1°) alignment group or neutral (0° ± 1°) alignment group according to the postoperative hip-knee-ankle axis. The mean difference of WOMAC score was 0.3 between the two groups at two years after surgery. As per outcomes, no clinical benefits of residual varus alignment were evident and both groups of patients had a functionally identical knee gait biomechanics, except for increased knee adduction moment (KAM) and varus alignment. They consider achieving neutral alignment as the first principle even in patients with varus alignment, which facilitates diminishing the KAM.