...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Injury >Biomechanical comparison of tension band- and interfragmentary screw fixation with a new implant in transverse patella fractures.
【24h】

Biomechanical comparison of tension band- and interfragmentary screw fixation with a new implant in transverse patella fractures.

机译：新型band骨种植体在band骨横向骨折中的张力带和节间螺钉固定的生物力学比较。

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

AIM: The aim of the present study was to compare the primary fixation stability and initial fixation stiffness of two established fixation techniques, the tension band wiring technique and interfragmentary screw fixation, with a mini-screw fragment fixation system in a model of transverse patella fracture. It was hypothesised that the biomechanical loading performance of the fragment fixation system would not significantly differ from the loading characteristics of the two established methods currently investigated. MATERIALS AND METHODS: Ninety-six calf patellae were used in this biomechanical model. A standardized transverse patella fracture was induced and three different fixation methods, including the modified tension band wiring technique, interfragmentary screw fixation, and the mini-screw fragment fixation system, were used for fragment fixation. Specimens were mounted to a loading rig which was secured within a material testing machine. In each fixation group, eight specimens were loaded to failure at a simulated knee angle of either 0 degrees or 45 degrees . Another eight specimens were submitted to a polycyclic loading protocol consisting of 30 cycles between 20N and 300N at a simulated knee angle of 0 degrees or 45 degrees . The residual displacement between the first and the last cycle was recorded. Differences in the biomechanical performance between the three fixation groups were evaluated. RESULTS: No significant differences between the three fixation groups were observed in the parameters maximum load to failure and linear fixation stiffness with monocyclic loading. Specimens being loaded at 45 degrees showed significantly lower maximum failure loads and linear stiffness when compared with 0 degrees . During polycyclic loading, no significant differences in the residual displacement were observed between the groups at 0 degrees loading angle, while at 45 degrees , residual displacement was significantly higher with tension band fixation when compared with interfragmentary screw fixation or the fragment fixation system. CONCLUSION: The biomechanical performance of the fragment fixation system was comparable to interfragmentary screw fixation and superior to the tension band wiring technique. Given the advantages of a system which provides interfragmentary compression and which simplifies fracture fixation after open or closed reduction, we believe the fragment fixation system to be an adequate alternative in the osteosynthesis of transverse patella fractures.
机译：目的：本研究的目的是在横行ella骨骨折模型中比较两种已建立的固定技术（张力带布线技术和节段性螺钉固定）与微型螺钉碎片固定系统的初步固定稳定性和初始固定刚度。 。假设片段固定系统的生物力学负载性能与目前研究的两种已建立方法的负载特性没有显着差异。材料与方法：在该生物力学模型中使用了九十六只小腿骨。诱发标准的pat骨横断骨折，并采用三种不同的固定方法，包括改良的张力带接线技术，节间螺钉固定和微型螺钉碎片固定系统，进行碎片固定。将样品安装到固定在材料测试机内的装载设备上。在每个固定组中，将八个标本以0度或45度的模拟膝角加载至破坏。另外8个样品接受了多循环加载方案，包括在20N和300N之间的30个循环，模拟的拐角为0度或45度。记录第一和最后一个循环之间的残余位移。评估了三个固定组之间的生物力学性能差异。结果：三个固定组之间在最大破坏载荷和线性固定刚度与单环载荷的参数方面没有观察到显着差异。与0度相比，以45度加载的试样显示最大破坏载荷和线性刚度明显降低。在多环加载过程中，在0度加载角下，两组之间的残余位移没有显着差异，而在45度时，与片段间螺钉固定或碎片固定系统相比，张力带固定的残余位移明显更高。结论：碎片固定系统的生物力学性能可与节段螺钉固定相媲美，并且优于张力带接线技术。考虑到该系统的优点是可以提供节段间压迫，并简化了开放或闭合复位后的骨折固定，因此我们认为，碎片固定系统是横transverse骨骨折骨合成中的适当替代方法。

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