The correlation between posterior tibial slope and maximal angle of flexion after total knee arthroplasty

Abstract

Purpose: The purpose of this study was to evaluate the correlation between the posterior tibial slope and the maximal angle of flexion after total knee arthroplasty. Materials and Methods: Seventy nine cases (63 patients, 60 females and 3 males), which received total knee arthroplasty with the Nexgen LPS system from Jan 2001 to Jan 2004, were enrolled. We divided all cases into two subsets in two ways. Firstly, group A (up to 10°, 44 cases) and group B (over 10°, 35 cases) were divided according to the mean value of the postoperative posterior tibial slope. Secondly, group α (up to-4°, 39 cases) and group β (over-4°, 40 cases) were divided according to the mean difference between the preoperative posterior tibial slope and the postoperative posterior tibial slope. We compared the maximal angle of flexion between group A and group B, group α and group β, respectively. Results: There was no significant difference between group A and group B, and also between group α and group β in terms of maximal angle of flexion. Conclusions: There was no significant correlation between the postoperative posterior tibial solpe and the maximal angle of flexion.