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首页> 外文期刊>Journal of Biomechanics >Tibio-femoral joint contact forces in sheep.
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Tibio-femoral joint contact forces in sheep.

机译：绵羊胫股关节的接触力。

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Although the sheep has become a standard model for understanding the mechanical conditions that occur after injury and investigating surgical treatments such as osteochondral defect healing and ligament reconstruction, no study has yet evaluated the contact forces that occur in the sheep tibio-femoral joint in vivo. In this study, bone pins, together with reflective markers, were used to measure the 3D kinematics of three sheep hind limbs, simultaneously with the ground reaction forces during repetitions of gait trials. Joint contact forces were then calculated using inverse dynamics and optimisation techniques. Whilst average peak axial tibio-femoral contact forces of 2.1 body weight (BW) were calculated across the 3 sheep, only small medio-lateral and antero-posterior shear forces, averaging 0.7 BW, were determined. Average knee flexion angles ranging from 49 degrees to 70 degrees were observed. From the forces determined in this study, we have provided a better understanding of the mechanical loading environment that occurs in sheep. This has important implications for the interpretation of knee studies in quadrupeds and their relevance to the clinical situation.
机译：尽管绵羊已经成为理解损伤后发生的机械状况并研究诸如软骨软骨缺损愈合和韧带重建等外科治疗方法的标准模型，但尚无研究评估绵羊在胫骨-股骨关节体内产生的接触力。在这项研究中，在重复步态试验期间，将骨针与反射标记一起用于测量三个绵羊后肢的3D运动学，同时测量地面反作用力。然后使用逆动力学和优化技术计算关节接触力。虽然计算了三只绵羊的平均峰值轴向胫骨股骨接触力为2.1体重（BW），但仅确定了较小的中外侧和前后剪力，平均为0.7 BW。观察到平均膝盖弯曲角度在49度到70度之间。通过本研究确定的力，我们对绵羊的机械负荷环境有了更好的了解。这对四足膝盖研究的解释及其与临床情况的相关性具有重要意义。

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