多用途脊柱内固定器治疗胸腰椎骨折的生物力学原理  

BIOMECHANICAL ANALYSIS OF SPINAL FIXATION INSTRUMENT OF MOST FUNCTION AND APPLICATION ON TREATMENT OF THORACOLUMBAR FRACTURES

作　　者：肖乃方[1] 王以进[2] 许立[3] 

机构地区：[1]江阴市中医院骨科,214400 [2]上海大学生物力学研究所 [3]苏州医学院附属一院骨科

出　　处：《医用生物力学》1999年第2期112-117,共6页Journal of Medical Biomechanics

基　　金：江苏省社会发展科研项目

摘　　要：目的：提高脊柱内固定的复位内固定效果，使其更符合脊柱生物刀学原理。方法：采用新鲜固定人尸脊柱标本7具，对标本造成胸腰段脊柱不稳定骨折，然后用本研制的多用途脊柱内固定器械加以固定，测定标本在4种不同生理工况下腰椎的应力（应变），位移，强度，刚度和稳定性变化。结果：腰椎的压缩、弯曲、扭转强度、刚度、总体稳定性、防跳杆、极限强度均比对照组（Dick内固定，Steffee内固定）强，均具显著性差异（P＜0．01）。结论：采用多用途脊柱内固定器械作脊柱固定，符合生物力学原理．具有推广应用价值。Objective: in order to improve the effect of the spinal reduction and fixation, let fixation devicesare good enough to conform the biomechanical requirement. Mathods: The experiment was carriedout with 7 human cadaver thoracolumbar spinal specimens. Models of unable thoraco lumberfracfures were caused by artificial stress on these specimens and new spinal fixation devices wereused in these specimens. The stress(stain), displacement, strength, rigidity and stabilization on thelumbar spinal specimens were measured with four different physiological conditions. Rusultf Theresult of the biomechanical tests on this device showed that MF was better than Dick and Steffee inall of strength, anti-axial compression, anti-rotation, rigidity and stability(p<0.01). Conclusion f Theresults of this spinal fixation instrument in treatment of 21 cases of unstable thoracolumbarfractures were statisfactory. This study indicated that this device is worth for application andpopularizing.

关 键 词：内固定器 胸腰椎骨折 生物力学 

分 类 号：R683.205[医药卫生—骨科学] R687.32[医药卫生—外科学]