Clinical results associated with changes of posterior tibial slope in total knee arthroplasty

Abstract

Purpose: The purpose of this retrospective study is to investigate the effect of posterior tibial slope (PTS) on clinical results in total knee replacement arthroplasty (TKA). Materials and Methods: We analyzed 801 knees in 768 patients who underwent TKA using a cruciate-retaining prosthesis for osteoarthritis from July 2003 to July 2009. PTS was measured on simple X-ray films and patients were divided into 5 groups, according to the change in PTS that was calculated by subtracting the preoperative from the postoperative PTS: group 1, >3o; group 2, 3o to 1o; group 3, 1o to-1o; group 4,-1o to-3o; and group 5,