摘要
目的 评价不同的前后路固定器械对脊柱稳定性的恢复情况。方法 用7例新鲜成人胸腰椎标本,测试T_(12)-L_1及L_1-L_2的三维运动,然后在CZZ-Ⅱ型人体撞击试验机上制作损伤模型。分别安装Steffee钢板、Kaneda和框式Harrington棒,并测试安装固定器后的三维运动情况。结果 三种器械均可以恢复标本屈伸及侧弯运动;但在轴向旋转方面,各器械均只有减少作用。结论 Steffee钢板可提供良好的稳定效果。在技术方法允许的情况下,利用Kaneda也是一种理想的治疗手段。
Objective To evaluate stability of thoroclumbar burst fractures after anterior or posterior instruments fixation. Methods The three - dimensional motion were tested on T12 - L1 and L1- L2 segments of 7 fresh adult thoroclumbar specimens before and after the specimens were impacted to burst fractures. Steffee plate, Kaneda and Harrington rod were used to fix the fractured spine and three - dimensional motion were tested after each fixation seperately. Results The three instruments can restore the flexion - extension movements of fractured specimens as well as normal ones, but can only reduce part of the excess rotation motion of the injuried specimens. Conclusion Steffee plate is the best instrument among the three ones, which can provide good stability, follows the Kaneda.
基金
本课题受广东省自然科学基金资助(项目编号950936)
关键词
器械
胸腰椎爆裂性骨折
固定
生物力学
Thoraclumbar Burst fracture Fixation instrument Biomechanics Stability
