【摘要】 自的 通过对模拟椎间盘损伤状态的脊柱稳定性研究,从生物力学角度来评价经皮穿刺腰椎间盘切割术。方法 采用新鲜人体脊柱腰骶段标本。按不同的正常脊柱标本和模拟经皮穿刺腰椎间盘切割术脊柱标本,分步进行加载,分别测定两坐标系间相对位移和转角。结果 绘制载荷-转角位移曲线,计算平均柔度系数和标化的平均柔度系数,发现椎间盘损伤状态下脊柱的抗扭能力明显下降(P<0.05)。结论 从生物力学角度而言,经皮穿刺腰椎间盘切割术是一种能较好保持脊柱稳定性的治疗腰椎间盘突出症的方法。更多还原

【Abstract】 Objective To investigate the stiffness of lumbar spine after the injury caused by percutaneous diskectomy and evaluate the efficiency of percutaneous lumbar diskectomy by biomechanical study. Methods Four fresh lumbar specimens were used to analyse load-displacement curves in the intact lumbar spine and vertical disc-injured lumbar spine. The concepts of average flexibility coefficient (f) and standardized average flexibility coefficient (fs) were also introduced. Results The load-displacement curves showed a good stabilization effect of the intact lumbar spine and disc-injured lumbar spine in flexion, extention, right and left bending. The decrease of anti-rotation also can be detected (P < 0. 05). Conclusion In biomechanical study, percutaneous lumbar diskectomy is one of the efficiency methods to treat lumbar diac hernia.更多还原