可控应力轴向诱导山羊腰椎间盘退变的实验研究
Medical Science Journal of Central South China(2018)
Abstract
探讨一种自行研制的可控应力器轴向压缩诱导山羊腰椎间盘退变的可行性,并观察山羊腰椎间盘的影像学变化.选取山羊16只,随机分为加压组和对照组,每组8只,用自行研制的可控应力器经皮固定于两组山羊的L4、5椎体,对山羊L4/5椎间盘进行轴向加压诱导,加压组轴向压缩应力设定为40N,对照组为0N,两组分别于术后第4周、第8周进行X线、磁共振检查.Pfirrmann 分级结果显示,第4周时,加压组山羊椎间盘Ⅲ级6只,Ⅱ级2只,对照组8只均为I级;第8周时,加压组椎间隙高度指数(DHI)小于对照组(P<0.05);加压组山羊椎间盘Pfir-rmann分级Ⅳ级5只,Ⅲ级3只,对照组8只仍均为I级.本实验结果说明,可控应力器轴向压缩诱导山羊腰椎间盘退变是可行的,相同可控应力轴向压缩诱导山羊椎间盘的时间越长,影像学的变化就越明显.
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Key words
controllable pressure,axial induce,intervertebral disc degeneration,experiment research
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