A preparation method of bionic porous artificial vertebral body based on 3D printing

Abstract

The invention provides a method for preparing a bionic porous artificial vertebral body based on 3D printing, comprising: 1. Constructing a finite element model of the spine; 2. Conducting a simulated biomechanical experiment on the constructed finite element model; 3. Under the stress distribution, adjust the size or position of the artificial vertebral body to obtain the artificial vertebral body model that is most in line with the biomechanics of the spine; 4. Using 3D printing technology, use PEEK material to print the artificial vertebral body model designed in step 3, and combine the artificial vertebral body with the The contact surfaces of the upper and lower vertebral bodies are printed with a porous structure that facilitates bone ingrowth. The invention analyzes the stress distribution of the artificial vertebral body, so that the artificial vertebral body meets the biomechanical requirements of the spine, and ensures the fusion, reliability and stability of use; the high-performance polymer material polyetheretherketone (PEEK) is used for 3D printing , good biomechanical matching, no interference to imaging examinations, personalized customization, in line with biomechanical requirements.

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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