...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Biomechanics >Forces in anterior cruciate ligament during simulated weight-bearing flexion with anterior and internal rotational tibial load.
【24h】

Forces in anterior cruciate ligament during simulated weight-bearing flexion with anterior and internal rotational tibial load.

机译：在模拟胫骨负重屈曲过程中，胫骨前交叉韧带受力，胫骨向前和向内旋转。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study determined in-vitro anterior cruciate ligament (ACL) force patterns and investigated the effect of external tibial loads on the ACL force patterns during simulated weight-bearing knee flexions. Nine human cadaveric knee specimens were mounted on a dynamic knee simulator, and weight-bearing knee flexions with a 100N of ground reaction force were simulated; while a robotic/universal force sensor (UFS) system was used to provide external tibial loads during the movement. Three external tibial loading conditions were simulated, including no external tibial load (termed BW only), a 50N anterior tibial force (ATF), and a 5Nm internal rotation tibial torque (ITT). The tibial and femoral kinematics was measured with an ultrasonic motion capture system. These movement paths were then accurately reproduced on a robotic testing system, and the in-situ force in the ACL was determined via the principle of superposition. The results showed that the ATF significantly increased the in-situ ACL force by up to 60% during 0-55 degrees of flexion, while the ITT did not. The magnitude of ACL forces decreased with increasing flexion angle for all loading conditions. The tibial anterior translation was not affected by the application of ATF, whereas the tibial internal rotation was significantly increased by the application of ITT. These data indicate that, in a weight-bearing knee flexion, ACL provides substantial resistance to the externally applied ATF but not to the ITT.
机译：这项研究确定了体外前交叉韧带（ACL）的力量模式，并研究了在模拟负重膝盖屈曲过程中外部胫骨负荷对ACL力量模式的影响。将九个人尸体膝盖样本安装在动态膝盖模拟器上，并模拟具有100N地面反作用力的承重膝盖屈曲;而机器人/通用力传感器（UFS）系统则用于在运动过程中提供外部胫骨载荷。模拟了三种外部胫骨负荷情况，包括无外部胫骨负荷（仅称为BW），50N前胫骨力（ATF）和5Nm内旋胫骨扭矩（ITT）。用超声运动捕捉系统测量胫骨和股骨的运动学。然后将这些运动路径准确地复制到机器人测试系统上，并通过叠加原理确定ACL中的原位力。结果表明，在0-55度屈曲时，ATF可以将原位ACL力显着提高多达60％，而ITT则没有。在所有载荷条件下，ACL力的大小都随着屈曲角度的增加而减小。胫骨前移不受ATF的影响，而胫骨内旋受ITT的影响明显增加。这些数据表明，在负重膝关节屈曲中，ACL对外部应用的ATF提供了很大的抵抗力，但对ITT没有提供抵抗力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号