Effects of kinematic alignment on range of motion after total knee arthroplasty / 中国康复理论与实践

ABSTRACT

ObjectiveTo explore the effect of kinematic alignment on postoperative knee function for patients after total knee arthroplasty (TKA). MethodsFrom June, 2020 to October, 2021, 200 patients undergoing primary TKA in Beijing Chaoyang Hospital were divided into mechanical alignment (MA) group (n = 100) and kinematic alignment (KA) group (n = 100). All the patients accepted comprehensive rehabilitation after operation. They were assessed with Keen Society Score (KSS) before and three months after operation, with Visual Analogue Scale for pain (VAS) before, and three days and three months after operation. The time of first standing, the time of first straight-leg raising more than 30°, and the active range of motion (AROM) of knee before, and one, two and three days, and one and three months after operation were recorded, as well as where to go after discharge. ResultsA total of 96 patients in MA group and 98 in KA group finished the research. The AROM of knee improved more in the KA group than in the MA group after operation (Fgroup = 8.816, P = 0.017), and the incidence going to the rehabilitation institutes was less (χ2 = 6.542, P = 0.011). ConclusionKA may promote the rapid recovery of AROM of knee for patients after TKA, and reduce the needs of institute-based rehabilitation after discharge, to save medical costs.