...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of orthopaedic research >The effect of radial head fracture size on elbow kinematics and stability.
【24h】

The effect of radial head fracture size on elbow kinematics and stability.

机译：head骨头骨折大小对肘关节运动学和稳定性的影响。

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 the effect of radial head fracture size and ligament injury on elbow kinematics. Eight cadaveric upper extremities were studied in an in vitro elbow simulator. Testing was performed with ligaments intact, with the medial collateral (MCL) or lateral collateral (LCL) ligament detached, and with both the MCL and LCL detached. Thirty degree wedges were sequentially removed from the anterolateral radial head up to 120 degrees . Valgus angulation and external rotation of the ulna relative to the humerus were determined for passive motion, active motion, and pivot shift testing with the arm in a vertical (dependent) orientation. Maximum varus-valgus laxity was calculated from measurements of varus and valgus angulation with the arm in horizontal gravity-loaded positions. No effect of increasing radial head fracture size was observed on valgus angulation during passive and active motion in the dependent position. In supination, external rotation increased with increasing fracture size during passive motion with LCL deficiency and both MCL and LCL deficiency. With intact ligaments, maximum varus-valgus laxity increased with increasing radial head fracture size. With ligament disruption, elbows were grossly unstable, and no effect of increasing radial head fracture size occurred. During pivot shift testing, performed with the ligaments intact, subtle instability was noted after resection of one-third of the radial head. In this in vitro biomechanical study, small subtle effects of radial head fracture size on elbow kinematics and stability were seen in both the ligament intact and ligament deficient elbows. These data suggest that fixation of displaced radial head fractures less than or equal to one-third of the articular diameter may have some biomechanical advantages; however, clinical correlation is required.
机译：这项研究确定了head骨头骨折大小和韧带损伤对肘关节运动学的影响。在体外肘部模拟器中研究了八个尸体上肢。在韧带完整的情况下进行测试，将内侧副韧带（MCL）或外侧副韧带（LCL）的韧带分开，同时将MCL和LCL分开。从前radial骨头部依次取出30度楔形物，直至120度。确定手臂的垂直（从属）方向的被动运动，主动运动和枢轴移位测试的尺骨外翻角度和尺骨相对于肱骨的外部旋转。通过测量手臂在水平重力位置时的内翻和外翻角度可计算出最大内翻-外翻松弛度。在从属位置的被动和主动运动过程中，未观察到radial骨头外翻角增大的影响。在旋后中，伴随LCL缺乏以及MCL和LCL缺乏的被动运动中，外旋随着骨折尺寸的增加而增加。对于完整的韧带，最大内翻-外翻松弛度随着radial骨头骨折尺寸的增加而增加。韧带破裂时，肘部严重不稳定，没有发生增加radial骨头骨折大小的影响。在韧带完好无损的情况下进行的枢轴移位测试期间，切除了head骨头的三分之一后，发现了轻微的不稳定性。在这项体外生物力学研究中，在完整的韧带和缺乏韧带的肘部中都观察到radial骨头骨折大小对肘关节运动学和稳定性的细微影响。这些数据表明，固定移位的radial骨头骨折小于或等于关节直径的三分之一可能具有一些生物力学优势。但是，需要临床相关性。

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