大、小直径钛网对终板-钛网界面应力分布影响的比较

目的 比较大、小直径钛网植骨对颈椎椎体次全切除减压终板-钛网界面应力分布的影响.方法 利用Ansys 9.0软件的建模功能,建立大、小直径钛网植骨钢板固定手术模型.分别对模型施加80 N预载荷及1.8 Nm力矩,使其产生轴向压缩、前屈和后伸运动,选取终板-钛网界面7个接触点,提取各个点的von Mise.应力,然后进行...

A finite element analysis of comparision study on mechanical changes on cage-endplate interface between different size of the titanium mesh cages with larger or small diameter after anterior cervical corpectomy

Objective To study the mechanical changes on cage-endplate interface between different size of the titanium mesh cages with larger or small diameter after anterior cervical corpectomy by finite element analysis.Methods Based on the intact finite element model（FE/Intact）,two models were generated by simulating anterior cervical titanium mesh fusion and plate after C5 corpectomy according to the applied titanium mesh cage conditions： Φ12 mm titanium mesh cage without internal end ring（L-）,Φ10 mm titanium mesh cage without internal end ring（S-）,von Mises stress of seven parts on the superior and inferior cage-endplate interface was comparatively analyzed between model with L-and model with S-after loading of each model being simulated using multidirectional moment loads of 1.8 Nm combined with a compressive preload of 80 N in compression,flexion and extension.Results The stress on the superior（mean stress：6.71、7.19、9.04）Mpa and inferior cage-endplate interface（mean stress：7.61、8.23、9.97）Mpa in the model with L-was smaller than that（mean stress：7.61、8.23、9.97,and 10.65、11.59、14.26）Mpa in the model with S-under the three loading conditions.Conclusions A titanium mesh cage with larger diameter produces a significant decrease of the cage-endplate interface stress and lower incidence of titamium mesh cage subsidence after anterior cervical corpectomy.But it would be proved further if it were used in clinical practice.