腰椎棘突间动态稳定装置Coflex最佳置入位置的生物力学
研究
祖丹;海涌;鲁世保;杨晋才;刘玉增;刘铁;孟祥龙;周立金;逄川
【期刊名称】《中华外科杂志》 【年(卷),期】2014(052)003
【摘要】Objective To evaluate the optimal insertion position of the Coflex lumbar interspinous dynamic stabilization device.Methods Six fresh adult human cadaveric lumbar spine specimens (L1-L5) were mounted in a materials testing machine by embedding to clamps with L1 and Ls vertebrae.L3-4 motion segment of each specimen was operated by selective decompression and Coflex interspinous device insertion.The L3 and L4 vertebrae was inserted one needle attached with four marker points respectively,which were used to record the range of motion (ROM).Each lumbar spine specimen was tested according to the loading sequence at 5 groups:intact (keeping lumbar ligamenta and facet joints intact) group,partial destabilized (resection of L3-4 interspinous ligamenta,ligamentum flavum,facet capsule,and bilateral resection 50％ of L3 inferior facets)group,10 mm insertion (distance between apex of U-shaped Coflex and dural sac was 10 mm) group,5 mm insertion (distance was 5 mm) group,and 0 mm insertion (distance was 0 mm) group.Each lumbar spine specimen was tested repeatedly 3 times according to a loading sequence consisting of
腰椎棘突间动态稳定装置Coflex最佳置入位置的生物力学研究
