Watanabe H, Shimada Y, Kagaya H, Sato K
Department of Orthopedic Surgery, Akita University School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan.
J Orthop Sci. 1999;4(2):89-98. doi: 10.1007/s007760050080.
The purpose of this study was to evaluate differences in the gait patterns of healthy and osteoarthritic hips, and changes in these patterns after intertrochanteric varus osteotomy of the femur, in relation to the strength of the muscles around the hip joint. We measured the strength ratio of hip abductor muscles, temporal and distance factors, and pelvic movement, and carried out dynamic electromyography (EMG) in 24 women who underwent unilateral varus osteotomy of the femur for hip osteoarthritis (OA), 30 non-surgically-treated women with hip OA, and 54 healthy women. The stance phase time was shorter and the strength ratio of hip abductor muscles was lower in the operated patients than these values in the other two groups, changes in pelvic obliquity and tilt were smaller, and changes in the percent maximum voluntary contraction of the gluteus medius and tensor fascia latae muscles were greater than these values in the healthy subjects. This study showed the postoperative reappearance of the simulated conditions in the hip before varus osteotomy of the femur, providing evidence that the pelvis was horizontally maintained during walking due to the decreased stance phase time and increased performance of the hip abductor muscles achieved after this procedure.
本研究的目的是评估健康髋关节与骨关节炎髋关节的步态模式差异，以及股骨转子间内翻截骨术后这些模式的变化，并探讨其与髋关节周围肌肉力量的关系。我们测量了24例行单侧股骨内翻截骨术治疗髋关节骨关节炎（OA）的女性、30例非手术治疗的髋关节OA女性以及54例健康女性的髋关节外展肌力量比值、时间和距离因素以及骨盆运动，并进行了动态肌电图（EMG）检查。与其他两组相比，手术患者的站立相时间较短，髋关节外展肌力量比值较低，骨盆倾斜和倾斜度的变化较小，臀中肌和阔筋膜张肌的最大自主收缩百分比变化大于健康受试者。本研究显示，股骨内翻截骨术前髋关节模拟状况在术后重现，这表明由于该手术术后站立相时间缩短和髋关节外展肌功能增强，步行过程中骨盆得以水平维持。
