...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of shoulder and elbow surgery >Reconstruction of the coronoid using an extended prosthesis: An in vitro biomechanical study
【24h】

Reconstruction of the coronoid using an extended prosthesis: An in vitro biomechanical study

机译：使用扩展的假体重建冠状动脉：一项体外生物力学研究

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

Background: When repair of comminuted coronoid fractures is not possible, prosthetic replacement may restore elbow stability. The purpose of this biomechanical study was to determine whether a coronoid implant with an extended tip would improve elbow stability compared with an anatomic prosthesis in the setting of collateral ligament insufficiency. Materials and methods: Passive elbow extension was performed in 7 cadaveric arms in the varus and valgus positions and active and passive extension in the horizontal position by use of an elbow motion simulator. Varus-valgus laxity of the ulna relative to the humerus was quantified with a tracking system with a native coronoid, a 40% coronoid deficiency, an anatomic prosthesis, and an extended prosthesis, with the collateral ligaments sectioned and repaired. Results: Laxity significantly increased after a 40% coronoid deficiency with both repaired and sectioned collateral ligaments (P ≤.01). With the ligaments repaired, there was no significant difference in laxity between the native coronoid, the anatomic implant, or the extended implant. Ligament sectioning alone produced severe instability, with a mean laxity of 42.75° ± 11.54° (P <.01). With insufficient ligaments, the anatomic prosthesis produced no change in laxity compared with the native coronoid, whereas the extended implant significantly reduced laxity by 21.56° ± 17.70° (P = .02). Conclusions: An anatomic coronoid implant with ligament repair restores stability to the coronoid-deficient elbow to intact levels. In the setting of ligament insufficiency, an extended implant improves stability relative to an anatomic implant, but the elbow remains significantly less stable than an intact elbow. Studies are needed to evaluate the feasibility of these designs.
机译：背景：当无法修复粉碎的冠状动脉骨折时，假体置换可恢复肘关节的稳定性。这项生物力学研究的目的是确定在侧副韧带功能不全的情况下，与解剖型假体相比，具有延长尖端的冠状冠状植入物是否会改善肘部稳定性。材料和方法：使用肘关节运动模拟器，在内翻和外翻位置的7个尸体手臂中进行被动肘部伸展，在水平位置中进行主动和被动伸展。尺骨相对于肱骨的内翻-外翻松弛是通过跟踪系统进行定量的，该跟踪系统具有天然冠突，40％冠突缺乏，解剖假体和延伸假体，并切开并修复了副韧带。结果：在40％的冠状动脉缺损后，修复和切开的侧副韧带松弛度均显着增加（P≤.01）。修复韧带后，天然冠状动脉，解剖植入物或扩展植入物之间的松弛度没有显着差异。仅韧带切片会产生严重的不稳定性，平均松弛度为42.75°±11.54°（P <.01）。与天然冠状动脉相比，在韧带不足的情况下，解剖假体的松弛度没有变化，而延长的植入物将松弛度显着降低了21.56°±17.70°（P = .02）。结论：具有韧带修复功能的解剖型冠状冠植入物可将缺冠的肘部恢复到完整水平。在韧带功能不全的情况下，相对于解剖植入物，延长的植入物可提高稳定性，但肘部的稳定性远不及完整的肘部。需要进行研究以评估这些设计的可行性。

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