模拟腰椎前路、后路间盘摘除术T_(12)—L_5腰段脊柱应力松弛蠕变实验研究

Experiment Study on Stress Relaxation and Creep of Spinal Lumbar Vertebrae (T_(12)—L_5) by Simulating Operations of Excising Lumbar Disc Intervertebrales by the Front Route and by the Back Route

研究了 18例新鲜尸体 T1 2 — L5腰段脊柱应力松弛、蠕变特性。测定了完整脊柱 (正常组 )及模拟前路 (对照 1组 )、后路手术 (对照 2组 )腰段脊柱的应力松弛和蠕变效应。得出了在恒应变、应力条件下应力——时间曲线及数据。用回归分析的方法处理实验数据 ,得出了归一化应力松弛、蠕变函数及曲线 。

We have studied the characteristics of stress relaxation and creep on lumbar vertebrae(T 12-T 5) of 18 fresh corpses. We measured the stress relaxation and creep of the normal group(intact spine),the control group 1(simulating the operations by the front route)and the control group 2(simulating the operations by the back route).Then we obtained the stress?strain-time curves and data under the conditions of constant stress and strain. By using regression analysis we obtained the reduced stress relaxation and creep functions. Finally, We analyzed and discussed the effects of the operations of excising the disc intervertebrales by the front route and the back route.