Design And Finite Element Analysis Of Improved Anatomical Titanium Mesh In Anterior Cervical

Object The development and finite element of improved anatomical titanium mesh cage(TMC) in cervical vertebra objective,To design and develop improved anatomical titanium mesh cage(IATMC) on the basis of normal anatomic characteristics of cervical spine,and we compare it with TMC,to objectively evaluate the practicality and reliability of improved titanium mesh,to provide foundation for clinical application.Methods 1.On the basis of the study of defect of current TMC and reference to the anatomic data of normal Chinese patients design and develop IATMC. 2. To developed and validated the finite element(C3~C7) model. 3. Based on the intact model, to simulate the anterior cervical fusion after corpectomy with TMC and IATMC,A finite element analysis was carried out to compare use biomechanical characteristics of two different kinds of TMC. The difference of stress distribution was recorded.Results 1. The IATMC has been designed. which was structured by one main cylinder and upper and lower ending part.the new TMC was designed with different sizes with the advantage of no more clipping before using it, which could be helpful to avoid subsidence of TMC. 2. Analytic results showed the Cervical activity of the finite element(C3~C7) model is Consistent with a reported in the literature. 3. Two kinds of titanium mesh cage finite element analysis results:1) The stress on the IATMC interface were smaller than TMC, and the emergence of TMC where the maximum stress is the titanium mesh place after the cut and endplate contact.The stress of IATMC dispersed evenly. 2)The vertebral stress distribution, TMC smaller than IATMC. 3)Analytic results showed using IATMC could reduce the stress of TMC-endplate contact.Conclusions: 1.IATMC has increased stability at the operative levels and are effective against postoperative subsidence. 2.The finite element(C3~C7) model proved to be useful and can be applied to the finite element analysis. 3.IATMC can reduce stress between TMC-endplate contact to avoid stress concentration,and decrease incidence of the postoperative subsidence.