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首页> 外文期刊>Journal of Biomechanics >Three-dimensional knee joint contact forces during walking in unilateral transtibial amputees
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Three-dimensional knee joint contact forces during walking in unilateral transtibial amputees

机译：单侧胫骨截肢者行走过程中的三维膝关节接触力

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Individuals with unilateral transtibial amputations have greater prevalence of osteoarthritis in the intact knee joint relative to the residual leg and non-amputees, but the cause of this greater prevalence is unclear. The purpose of this study was to compare knee joint contact forces and the muscles contributing to these forces between amputees and non-amputees during walking using forward dynamics simulations. We predicted that the intact knee contact forces would be higher than those of the residual leg and non-amputees. In the axial and mediolateral directions, the intact and non-amputee legs had greater peak tibio-femoral contact forces and impulses relative to the residual leg. The peak axial contact force was greater in the intact leg relative to the non-amputee leg, but the stance phase impulse was greater in the non-amputee leg. The vasti and hamstrings muscles in early stance and gastrocnemius in late stance were the largest contributors to the joint contact forces in the non-amputee and intact legs. Through dynamic coupling, the soleus and gluteus medius also had large contributions, even though they do not span the knee joint. In the residual leg, the prosthesis had large contributions to the joint forces, similar to the soleus in the intact and non-amputee legs. These results identify the muscles that contribute to knee joint contact forces during transtibial amputee walking and suggest that the peak knee contact forces may be more important than the knee contact impulses in explaining the high prevalence of intact leg osteoarthritis.
机译：相对于残肢和非截肢者，单侧胫骨截肢的个体在完整膝关节中的骨关节炎患病率更高，但这种患病率更高的原因尚不清楚。这项研究的目的是使用正向动力学模拟比较步行过程中被截肢者和非被截肢者之间的膝关节接触力和对这些力有贡献的肌肉。我们预测完好无损的膝盖接触力将高于残肢和非截肢者。在轴向和前外侧方向上，完整的和非截肢的腿相对于剩余的腿具有更大的峰值胫股骨接触力和冲动。相对于非截肢者腿，完整腿中的最大轴向接触力更大，但是非截肢者腿中的姿态相位冲动更大。早期站立时的粗大肌和绳肌，晚期站立时的腓肠肌是非截肢者和完整腿的关节接触力的最大贡献者。通过动态耦合，比目鱼肌和臀中肌也有很大的贡献，即使它们不跨越膝关节。在残肢中，假体对关节力有很大贡献，类似于在完整的和非截肢的腿中的比目鱼肌。这些结果确定了在经胫骨截肢者行走过程中有助于膝关节接触力的肌肉，并表明在解释完整的腿部骨关节炎的高患病率时，峰值膝盖接触力可能比膝盖接触冲动更为重要。

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