改良解剖型颈椎钛网在颈椎前路椎体次全切术中的三维有限元分析

doi:10.3969/j.issn.1671-7171.2017.07.007

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Abstract 【Objective】To evaluate biomechanical property of improved anatomical titanium mesh cage (IMTMC) in anterior cervical corpectomy and fusion (ACCF).【Methods】A finite element model of intact cervical spine (C_3~7) was developed to simulate the ACCF operation process, establishing both traditional titanium mesh cage and improved anatomical titanium cage. Tests were made with pre-load of 40N and 1.5Nm torque to the model, which caused motion of flexion, extension, left, right bending and left, right rotation of the model. The maximum stress, stress distribution of both two kinds of cages, cervical vertebra and TMC-endplate contact were recorded.【Results】Under 6 different conditions of flexion, extension, left, right, left turn, right turn , the maximum equivalent stress values of the traditional cervical titanium mesh were 73.782, 177.36, 124.42, 100.85, 191.64 and 221.91 MPa, respectively; the maximum equivalent stress values of the new modified titanium mesh were 31.028, 62.236, 46.053, 44.337, 41.549 and 39.255 MPa, respectively; The stress distribution of the vertebral body of the new modified titanium mesh was much smaller than that of the traditional titanium mesh; The stress of C4 and C6 endplate contact surface of the modified titanium mesh was less than that of traditional titanium mesh contact point.【Conclusion】The application of modified anatomic cervical titanium mesh in ACCF can effectively avoid the stress concentration of endplate, and can reduce the incidence of titanium mesh depression theoretically.

Key words： Cervical Vertebrae Titanium/TU CERVICAL SPONDYLOSIS/SU Biomechanics Finite Element Analysis

Received: 06 March 2017

PACS:

R681.531

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http://www.jcr.net.cn/EN/10.3969/j.issn.1671-7171.2017.07.007 OR http://www.jcr.net.cn/EN/Y2017/V34/I7/1267

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