Is There an Advantage with Measured Resection for Femoral Rotation Resection in TKA? A Randomized Controlled Trial

BackgroundTotal knee arthroplasty (TKA) is performed by gap balance (GB) and measured resection (MR) techniques for femoral rotation resection to achieve knee flexion balance and knee stability. It is still controversial to choose which technique is more advantageous. The purpose of this study was to compare the early clinical efficacy of GB and MR in TKA.MethodsThis study was a prospective randomized, double-blind controlled trial. From March 2018 to March 2019, 99 patients (99 knees) who underwent TKA at our institution were randomly treated with GB and MR. The cutting thickness of posterior condyle, radiographic findings, medial and lateral compartment pressure, gait analysis, and patients satisfaction were recorded. ResultsA total of 110 patients were enrolled for unilateral THA. Finally, 99 patients were included for analysis and comparison at 12 months follow-up. In GB group, the angle of Cutting Block to PCA was significantly lower than in the MR group (P0.05).ConclusionIn TKA, GB or MR techniques for femoral external resection has little effect on daily walking. However, the GB technique has advantages in early postoperative knee stability and knee flexion function improvement.