Department of Orthopaedic and Neuro-Musculoskeletal Surgery, Faculty of Medical, and Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan.
J Arthroplasty. 2009 Oct;24(7):1120-4. doi: 10.1016/j.arth.2008.08.008. Epub 2008 Sep 26.
Achieving very deep flexion after total knee arthroplasty is an important goal of most patients in Japan, Asia, and the Middle East because of floor-sitting lifestyles. Numerous knee arthroplasty designs have been introduced to permit high flexion. We performed an in vivo radiographic analysis of tibiofemoral motions during weight-bearing kneeling in one high-flexion knee arthroplasty design. Twenty knees implanted with a posterior-stabilized rotating-platform knee arthroplasty flexed an average of 126 degrees. The femoral condyles translated posteriorly from extension to maximum flexion. Total posterior condylar translations averaged 11.6 and 4.7 mm for the lateral and medial condyles, respectively. Tibial internal rotation in 19 knees averaged 9 degrees from extension to maximum flexion. Knees implanted with a posterior-stabilized, rotating-platform knee arthroplasty show deep flexion knee kinematics consistent with the implant design intent.
在日本、亚洲和中东地区，由于席地而坐的生活方式，患者在全膝关节置换术后实现非常大的屈曲度是一个重要目标。为了实现高屈曲度，已经引入了许多膝关节置换设计。我们对一种高屈曲膝关节置换设计的负重跪姿下的胫股运动进行了体内放射学分析。20 个膝关节采用后稳定旋转平台膝关节置换，平均屈曲 126 度。从伸展到最大屈曲时，股骨髁向后移位。外侧和内侧髁的总后髁翻译平均为 11.6 和 4.7 毫米。19 个膝关节的胫骨内旋平均为从伸展到最大屈曲的 9 度。采用后稳定、旋转平台膝关节置换的膝关节表现出与植入物设计意图一致的深屈膝关节运动学。
