摘要
[目的]探讨用计算骨丧失量的方法经椎弓根打压植骨(transpedicular impacted grafting,TPIG)治疗胸腰椎压缩性骨折的生物力学性能。[方法]将6具成人新鲜尸体胸腰椎标本,模拟正常组、压缩性骨折损伤组、单纯计算骨丧失量TPIG和单纯经椎弓根植骨组(transpedicular grafting,TPG)、计算骨丧失量TPIG+椎弓根固定和TPG+椎弓根固定组,行生物力学实验应力分析,比较各组的椎体和椎间盘的强度、刚度和稳定性以及扭转生物力学性能。[结果](1)计算骨丧失量TPIG+椎弓根固定组的椎体和椎间盘的强度、刚度和稳定性高于TPG+椎弓根固定组,具有显著性差异(P<0.05);(2)单纯计算骨丧失量TPIG组的强度和刚度高于单纯TPG组,并具有显著性差异(P<0.05);(3)从扭转生物力学试验中也同样得到了相似的结论。[结论]计算骨丧失量TPIG+椎弓根固定治疗胸腰椎压缩性骨折具有优越的生物力学性能,适合于临床应用。
[ Objective ] To investigate the biomechanical properties of transpedicular impacted grafting （ TPIG ） after bone loss calculation in the treatment of thoracolumbar compression fracture. [ Method ] Six fresh human thoracolumbar spine （ T12 - L2 ） specimens were tested as 6 models ： normal control （ group A ）, compression fracture （ group B）, TPIG after bone loss calculation （group C）,transpedicular grafting （TPG） （group D） ,TPIG after bone loss calculation ＋ pedicle fixation （group E）,TPG ＋ pedicle fixation （group F）. Biomechanical analysis was carried out to test the intensity, stiffness, stability and torsion properties between different groups. [ Result ] The intensity, stiffness and stability of vertebral body and intervertebral disc in group E were higher than those in group F,with significant difference （ P 〈 0.05 ）. The intensity and stiffness in group C were higher than those in group D, with significant difference （ P 〈 0.05 ）. Similar results were fuund in biomechanical torsion test, with significant differenee （P 〈0.05）. [ Conclusion] Transpedicular impacted grafting after bone loss calculation combined with pediele fixation has better biomechanieal properties,it is suitable for clinical application.
出处
《中国矫形外科杂志》
CAS
CSCD
北大核心
2010年第8期654-658,共5页
Orthopedic Journal of China
关键词
胸腰椎压缩性骨折
计算骨丧失量
经椎弓根打压植骨
内固定
生物力学
thoracolumbar compression fracture, bone loss calculation, transpedicular impacted grafting, fixation, biomechanics
