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首页> 外文期刊>Journal of Biomechanics >Musculo-skeletal loading conditions at the hip during walking and stair climbing.
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Musculo-skeletal loading conditions at the hip during walking and stair climbing.

机译：步行和爬楼梯期间臀部的肌肉骨骼负荷情况。

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Musculo-skeletal loading plays an important role in the primary stability of joint replacements and in the biological processes involved in fracture healing. However, current knowledge of musculo-skeletal loading is still limited. In the past, a number of musculo-skeletal models have been developed to estimate loading conditions at the hip. So far, a cycle-to-cycle validation of predicted musculo-skeletal loading by in vivo measurements has not been possible. The aim of this study was to determine the musculo-skeletal loading conditions during walking and climbing stairs for a number of patients and compare these findings to in vivo data.Following total hip arthroplasty, four patients underwent gait analysis during walking and stair climbing. An instrumented femoral prosthesis enabled simultaneous measurement of in vivo hip contact forces. On the basis of CT and X-ray data, individual musculo-skeletal models of the lower extremity were developed for each patient. Muscle and joint contact forces were calculated using an optimization algorithm. The calculated peak hip contact forces both over- and under-estimated the measured forces. They differed by a mean of 12% during walking and 14% during stair climbing.For the first time, a cycle-to-cycle validation of predicted musculo-skeletal loading was possible for walking and climbing stairs in several patients. In all cases, the comparison of in vivo measured and calculated hip contact forces showed good agreement.Thus, the authors consider the presented approach as a useful means to determine valid conditions for the analysis of prosthesis loading, bone modeling or remodeling processes around implants and fracture stability following internal fixation.
机译：肌肉骨骼负荷在关节置换的主要稳定性和骨折愈合涉及的生物过程中起着重要作用。但是，目前关于肌肉骨骼负荷的知识仍然有限。过去，已经开发了许多肌肉骨骼模型来估计髋关节的负重状况。迄今为止，尚不可能通过体内测量来逐周期验证预测的肌肉骨骼负荷。这项研究的目的是确定许多患者在步行和爬楼梯期间的肌肉骨骼负荷情况，并将这些发现与体内数据进行比较。在全髋关节置换术后，四名患者在步行和爬楼梯期间进行了步态分析。股骨假体能够同时测量体内髋部接触力。根据CT和X射线数据，为每位患者开发了下肢的各个肌肉骨骼模型。使用优化算法来计算肌肉和关节的接触力。计算出的峰值髋部接触力高估和低估了测得的力。它们在步行过程中的平均差异为12％，在爬楼梯过程中的平均差异为14％。首次，有几例患者可以通过逐周期验证预测的肌肉和骨骼负荷。在所有情况下，体内测量和计算的髋部接触力的比较均显示出良好的一致性。因此，作者认为，本文提出的方法是确定分析假体负载，骨模型或植入物周围的重塑过程的有效条件的有用手段。内固定后的骨折稳定性。

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