The Effect of Postoperative Mild Varus Deformity on Functional Outcome Scores after Primary Total Knee Arthroplasty in Patients with Varus Osteoarthritis

Abstract

Introduction: This study evaluated the effect of both postoperative residual varus alignment and the amount of correction in lower limb alignment (LLA) on postoperative functional outcomes of total knee arthroplasty TKAs in patients with preoperative varus deformity. Methods: Two-hundred and fifty-two knees of 209 patients who underwent a TKA for treating varus gonarthrosis were retrospectively reviewed in the study. Patients were then divided into the three groups according to the postoperative hip-knee-ankle angle (HKAA): the neutral group (NG) (HKAA: 183°-177°); the mild varus group (HKAA: 176.9°-174°); and the severe varus group (HKAA