Bionic porous artificial vertebral body preparation method based on 3D printing

Abstract

The invention provides a bionic porous artificial vertebral body preparation method based on 3D printing. The bionic porous artificial vertebral body preparation method comprises the following steps:1, constructing a spine finite element model; 2, performing a simulated biomechanical experiment on the constructed spine finite element model; 3, adjusting the size or position of the artificial vertebral body according to the stress distribution borne by the artificial vertebral body to obtain an artificial vertebral body model most conforming to spine biomechanics; and 4, printing the artificial vertebral body model designed in the step 3 by using a PEEK material by using a 3D printing technology, and printing the contact surfaces of the artificial vertebral body and upper and lower vertebral bodies into a porous structure beneficial to bone ingrowth. The stress distribution borne by the artificial vertebral body is analyzed, so that the artificial vertebral body meets the spine biomechanics requirement, and the fusion, reliability and stability of use are guaranteed; 3D printing is carried out by adopting a high-performance polymer material polyether-ether-ketone (PEEK), so that the biomechanical matching performance is good, no interference is caused to imaging examination, personalized customization is realized, and the biomechanical requirements are met.

Description

technical field [0001] The invention relates to the technical field of spinal vertebral body reconstruction, in particular to a method for preparing a bionic porous artificial vertebral body based on 3D printing. Background technique [0002] At present, in spinal surgery, for patients with spinal diseases who need to resect the vertebral body, most of the missing vertebral bodies are filled with titanium alloy titanium cage + autologous bone or allogeneic bone, but it is usually necessary to fill the allogeneic bone or autologous bone to achieve it in the later stage Bone fusion, allogeneic bone is expensive, and rejection may occur, and autologous bone requires a second operation to take the ilium, which may cause wound complications and sequelae. Even 3D printed artificial vertebral bodies are mostly made of metal materials such as titanium alloys, but metal materials have problems such as elastic modulus mismatch, stress shielding, and interference with imaging examinati...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bionic porous artificial vertebral body preparation method based on 3D printing, to solve the problem that the existing 3D printing artificial vertebral body preparation method does not carry out simulated biomechanical experiments, and does not combine solid mechanical detection with biomechanical analysis , so the printed vertebra cannot well meet the biomechanical requirements of the spine

[0007] In order to realize the above 3D printing-based bionic porous artificial vertebral body preparation method, the existing 3D printing artificial vertebral body preparation method does not carry out simulated biomechanical experiments, and does not combine solid mechanical testing with biomechanical analysis, so the printed vertebral body Can not well meet the problem of spinal biomechanics requirements, the present invention provides the following technical solutions:

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