...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of orthopaedic research >Tension in a double loop tendon anterior cruciate graft during a simulated open chain knee extension exercise.
【24h】

Tension in a double loop tendon anterior cruciate graft during a simulated open chain knee extension exercise.

机译：在模拟的开环膝盖伸展运动中，双环腱前交叉移植物中的张力。

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

Concerns exist regarding the tension developed in a reconstructed anterior cruciate ligament (ACL) during open chain knee extension exercises used to rehabilitate the knee. Therefore, the primary objective was to measure tension in an ACL graft during a simulated open chain knee extension exercise as a function of ankle weight. A secondary objective was to determine whether the graft tension was reduced with relatively high stiffness fixation. The open chain exercise was simulated in seven cadaveric specimens in which the ACL had been reconstructed with double loop tendon grafts. Graft tension was measured at 15 degrees of flexion as the effective ankle weight was increased from 22.5 to 67.5 and then to 112.5 N for three different fixation stiffnesses (25, 125, and 225 N/mm). The initial tension was set to restore the 225 N anterior limit of motion to that of the intact knee at 30 degrees of flexion. Increasing the ankle weight caused the graft tension to increase significantly (p<0.0001), but the increase with the highest ankle weight was only 62 N on average. Increasing the fixation stiffness caused the graft tension to decrease significantly (p<0.0001) because the initial tension decreased by 107 N as the fixation stiffness increased. Because the graft tension with the highest ankle weight was limited to 112 N on average, high stiffness fixation methods, which are also resistant to lengthening in the region of the fixation, may reduce the risk of graft construct lengthening during open chain knee extension exercises.
机译：在用于恢复膝关节的开放式膝关节伸展运动期间，在重建的前交叉韧带（ACL）中产生的张力存在担忧。因此，主要目的是在模拟的开链膝关节伸展运动过程中，根据踝关节重量测量ACL移植物中的张力。第二个目的是确定采用相对较高的硬度固定是否可以降低移植物张力。在七个尸体标本中模拟了开链运动，在该标本中，使用双环腱移植物重建了ACL。在三种不同的固定刚度（25、125和225 N / mm）下，当有效脚踝重量从22.5增加到67.5，然后增加到112.5 N时，在15度屈曲度下测量移植物张力。初始张力设定为在30度屈曲时将225 N的前运动极限恢复到完整膝盖的运动极限。踝关节重量的增加导致移植物张力显着增加（p <0.0001），但踝关节重量最高时的平均升高仅为62N。固定刚度的增加导致移植物张力显着降低（p <0.0001），因为随着固定刚度的增加，初始张力降低了107N。由于最大踝关节重量的移植物张力平均平均限制为112 N，因此高硬度固定方法（也可抵抗固定范围内的伸长）可以降低开环膝关节伸展运动中移植物结构伸长的风险。

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