Steiner M E, Simon S R, Pisciotta J C
Department of Orthopaedics, Harvard Medical School, Children's Hospital Medical Center, (Gait Analysis Laboratory), Cambridge, Massachusetts.
Clin Orthop Relat Res. 1989 Jan(238):174-82.
Fourteen knees in 11 individuals were studied before knee arthroplasty and at three and six months following surgery. Eleven of these knees were further evaluated at 12 months following surgery. At each evaluation, kinematic, electromyographic, and force plate data were gathered during level walking. Maximum knee extension and flexion torques were also determined. The greatest improvement in gait was noted in the first three postoperative months when velocity increased 13% and stride length increased 14%. After six months gait changes were negligible. Maximum knee torques in the osteoarthritic population were decreased at three months, then returned to preoperative levels at six months. In the rheumatoid population, maximum knee torques steadily increased up to six months following surgery. Gait abnormalities that persist at six months and beyond following knee arthroplasty appear to be most related to the presence of arthritis in joints other than in the operated knee(s).
对11名个体的14个膝关节在膝关节置换术前、术后3个月和6个月进行了研究。其中11个膝关节在术后12个月进一步评估。每次评估时，在平地行走过程中收集运动学、肌电图和测力板数据。还测定了最大膝关节伸展和屈曲扭矩。术后前三个月步态改善最为明显，速度增加13%，步幅增加14%。六个月后步态变化可忽略不计。骨关节炎患者的最大膝关节扭矩在术后三个月降低，然后在六个月时恢复到术前水平。类风湿性关节炎患者的最大膝关节扭矩在术后六个月内稳步增加。膝关节置换术后六个月及以后持续存在的步态异常似乎与手术膝关节以外的其他关节存在关节炎关系最为密切。
