颈椎前路内植入固定系统的有限元模拟及生物力学分析

Biomechanical evaluation and finite element analysis of the anterior cervical spine plate

通过建立一种颈椎前路内植入固定器测试结构的有限元模型,从生物力学角度对该模型在人体生理性压力载荷下的应力-应变分布和运动特性进行分析评估。结果表明:在生理性轴向压力载荷下,应力-应变集中分布在骨螺钉和内植入固定板的结合部位,钢板上的应力-应变以四个螺钉为定点呈梅花状分布,边缘处应力-应变分布较小,所得结论与临床结果一致。因此,通过该有限元方法可以有效分析颈椎前路内植入固定器在生理性载荷下的应力应变分布,对颈椎前路内植入固定器的外形设计和在临床上的选择提供科学的参考依据。

To create a finite test model of anterior cervical fixation and screw and then analyze and evaluate the distribution of stress-strain and displacement character on the system under the physiological compression load. The result shows that stress-strain mainly distributes on the connection between bone screw and anterior cervical plate （ACP） under the physiological load. Stress-strain distributes like a plum blossom on the ACP with little stress-strain on the edge of plate, which is consistent with the result of clinic. Therefore, this finite element method can effectively evaluate the distribution of stress-strain on the ACP under the physiological load,which help us to design ACP much better and choose it more appropriate in clinical surgical.