【摘要】 基于有限元法，研究了人工锥体（AVB）的尺寸对颈椎锥体置换融合术（VBRF）重建结构生物力学特性的影响.首先，开发了一个Abaqus插件，其可以参数化建立人工锥体三维模型并配合颈椎有限元模型建立VBRF有限元模型；其次，对多种VBRF模型（AVB的尺寸不同）进行有限元分析；最后，引入了与植入物和椎骨融合密切相关的重要指标P_ease值（终板中利于骨生长的应变面积与终板总面积的比值）,并进行了比较.结果表明：在AVB大小相同壁厚不同的条件下终板P_ease值没有明显差异，但是，AVB的大小对终板的P_ease值有显著影响.AVB的外半径在4～6 mm之间时，P_ease值相对较高，更有利于植入物与椎骨融合.更多还原

【Abstract】 Based on the finite element method, the effects of the size of artificial vertebral body（AVB） on the biomechanical properties of the reconstructed structure of vertebral body replacement and fusion（VBRF） was studied. Firstly, an Abaqus plug-in was developed, which could parametrically establish the three-dimensional model of AVB, and cooperate with the finite element model of the cervical spine to establish the finite element model of VBRF. Secondly, the finite element analysis was given to various VBRF models（different sizes of AVB）. Finally, P_ease value, an important index closely related to implant and vertebral fusion, was introduced and compared. The results showed that there is no significant difference in the P_ease value under the condition of the same size of AVB and different wall thickness, but the size of AVB has a significant effect on the P_ease value. The P_ease value is relatively higher when the outer radius of AVB is in the range of 4～6 mm, which is more conducive to the fusion of implants and vertebrae.更多还原