In vivo knee moments and shear after total knee arthroplasty
In vivo knee moments and shear after total knee arthroplasty
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DOI：
10.1016/j.jbiomech.2007.03.004
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发表时间：
2007-01-01
影响因子：
2.4
通讯作者：
Colwell, Clifford W., Jr.
中科院分区：
文献类型：
--
作者：
D'Lima, Darryl D.;Patil, Shantanu;Colwell, Clifford W., Jr.
胫股载荷在全膝关节置换术后软骨退变以及部件存活率方面非常重要。我们以前曾报道过轴向膝关节的力量在体内。在这项研究中，将测量胫骨力所有六个分量的第二代力传感装置植入一名74 kg、83岁的男性。视频运动分析，地面反作用力，并在步行，爬楼梯，椅子上升，和蹲活动膝关节的力量进行了测量。行走期间的峰值总力为体重（BW）的2.3倍，椅子上升期间为2.5 x BW，爬楼梯期间为3.0 x BW，蹲下期间为2.1 x BW。胫骨托的峰值前向剪切力在行走期间为0.30 x BW，在椅子上升期间为0.17 x BW，在爬楼梯期间为0.26 x BW，在下蹲期间为0.15 x BW。对于椅子上升活动，托盘处的峰值屈曲力矩为1.9% BW x Ht（体重百分比乘以身高），而对于蹲下活动，托盘处的峰值屈曲力矩为1.7% BW x Ht。在椅子上升期间，托盘处的峰值内收力矩为-1.1%BW x Ht，在蹲下期间为-1.3%BW x Ht。外膝屈曲和内收力矩明显大于胫骨托处的屈曲和内收力矩。轴向分量的力量占主导地位，特别是在步行的立场阶段。与膝关节总作用力相比，胫骨托的剪切力和力矩非常适中。这些发现表明膝关节周围的软组织吸收了大部分外部剪切力。我们的研究结果强调了直接测量膝关节力的重要性。(c)2007爱思唯尔有限公司保留所有权利。
Tibiofemoral loading is very important in cartilage degeneration as well as in component survivorship after total knee arthroplasty. We have previously reported the axial knee forces in vivo. In this study, a second-generation force-sensing device that measured all six components of tibial forces was implanted in a 74-kg, 83-year-old male. Video motion analysis, ground reaction forces, and knee forces were measured during walking, stair climbing, chair-rise, and squat activities. Peak total force was 2.3 times body weight (BW) during walking, 2.5 x BW during chair rise, 3.0 x BW during stair climbing, and 2.1 x BW during squatting. Peak anterior shear force at the tibial tray was 0.30 x BW during walking, 0.17 x BW during chair rise, 0.26 x BW during stair climbing, and 0.15 x BW during squatting. Peak flexion moment at the tray was 1.9% BW x Ht (percentage of body weight Multiplied by height) for chair-rise activity and 1.7% BW x Ht for squat activity. Peak adduction moment at the tray was -1.1% BW x Ht during chair-rise, -1.3% BW x Ht during squatting. External knee flexion and adduction moments were substantially greater than flexion and adduction moments at the tray. The axial component of forces predominated especially during the stance phase of walking. Shear forces and moments at the tray were very modest compared to total knee forces. These findings indicate that the soft tissues around the knee absorbed most of the external shear forces. Our results highlight the importance of direct measurements of knee forces. (c) 2007 Elsevier Ltd. All rights reserved.