Analysis For The Result Of Total Knee Arthroplasty In Extension Stiff Knee

Objective： To explore the technique and clinical result of total kneearthroplasty(TKA) in extension stiff knee. Methods：Followed-up and retrospectivestudied of TKA in11(13knees) patients who had extension stiff knees from January2006to June2011.To statistical analyze and compare of followed-up preoperative knee stiffnesstime, joint range of movement(ROM) and the American knee society score(KSS) inpreoperative and postoperative. Result：The patients were followed for18.4months onaverage (range,3to24months). The mean preoperative knee ROM was6.54±6.58degrees and the mean postoperative knee ROM was87.69±6.33degrees, with significantdifference(t=47.379, P=0.000). The mean preoperative KSS was37.23±11.93points andthe mean post-operative KSS was86.08±2.96points, with significant difference(t=16.001,P=0.000). The mean preoperative function score was13.46±11.62points and the meanpostoperative function score was82.31±8.81points, with significant difference(t=34.882,P=0.000). Pearson correlation shows positively between preoperative and postoperativeknee joint ROM(r=0.543, P=0.042). And the difference of preoperative and postoperativeknee joint ROM is associated negatively with preoperative knee stiffness time(r=-0.387,P=0.034). The complications included:1knee hematoma,2knees snapping when activity,1deep infection of the knee. There were no deep venous thrombosis(DVT), no nerveinjury, no incision skin necrosis or other complications. Conclusions： Total kneearthroplasty in treatment of extension stiff knee can be performed successfully. Althoughthe complication rate is higher, if we treated properly we will achieve a satisfactoryclinical result.