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Preparation of artificial joint prosthesis with partially controllable porous structure

A technology of porous structure and artificial joints, applied in the direction of prosthesis, joint implants, joint implants, etc., can solve the problems of mechanical properties of damaged prostheses, and achieve the effect of protecting high-strength mechanical properties

Inactive Publication Date: 2008-11-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for preparing an artificial joint prosthesis with a locally controllable porous structure, so that it can overcome the existing problem of damaging the mechanical properties of the prosthesis itself during the preparation of the surface porous structure of the artificial joint prosthesis. Insufficient, build a controllable pore structure, provide a suitable space structure for the growth of cells and tissues, promote the growth of new tissue and joint prosthesis, and realize the biological fixation of the prosthesis

Method used

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  • Preparation of artificial joint prosthesis with partially controllable porous structure
  • Preparation of artificial joint prosthesis with partially controllable porous structure

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Embodiment 1

[0024] First of all, according to the basic principles that are beneficial to the growth of cells and tissues, the commercial CAD software Unigraphix is ​​used to design a honeycomb porous structure. The pore size is 200 μm, the porosity is 50%, and the pores are completely connected to each other. The designed porous structure The solid CAD model is stored in STL file format; the STL data is input into the rapid prototyping system, and the layered slice processing is performed to obtain the two-dimensional information data of the porous structure; then direct metal rapid prototyping is carried out, and the Ti6Al4V alloy powder is fed by the powder feeding mechanism The powder material is sent to the predetermined area, and the powder spreading mechanism flattens and compacts the powder. Then, the electron beam scans according to the obtained two-dimensional information data under the control of the computer, melts and sinters the powder material, and then feeds the powder and l...

Embodiment 2

[0026] Firstly, according to the basic principle that is conducive to the growth of cells and tissues, the honeycomb porous structure is designed by using the commercial CAD software Unigraphix. The pore size is 600 μm, the porosity is 70%, and the pores are completely connected to each other. The designed porous structure The solid CAD model is stored in STL file format; the STL data is input into the rapid prototyping system, and the layered slice processing is performed to obtain the two-dimensional information data of the porous structure; then direct metal rapid prototyping is carried out, and the Ti6Al4V alloy powder is fed by the powder feeding mechanism Then, the electron beam scans according to the obtained two-dimensional information data under the control of the computer, melts and sinters the powder material, and then feeds the powder and lays the powder. powder, melting and sintering powder, and repeat this process until the entire test piece is formed. The basic p...

Embodiment 3

[0028]Firstly, according to the basic principle that is conducive to the growth of cells and tissues, the honeycomb porous structure is designed by using the commercial CAD software Unigraphix. The pore size is 1000 μm, the porosity is 90%, and the pores are completely connected to each other. The designed porous structure The solid CAD model is stored in STL file format; the STL data is input into the rapid prototyping system, and the layered slice processing is performed to obtain the two-dimensional information data of the porous structure; then direct metal rapid prototyping is carried out, and the Ti6Al4V alloy powder is fed by the powder feeding mechanism The powder material is sent to the predetermined area, and the powder spreading mechanism flattens and compacts the powder. Then, the electron beam scans according to the obtained two-dimensional information data under the control of the computer, melts and sinters the powder material, and then feeds the powder and lays t...

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Abstract

An artificial joint prosthesis with locally controllable porous structure and a method for making the same belong to the biomedical engineering field. The method comprises the following steps that: firstly, a porous structural body is designed by means of commercialized CAD software, and designed porous structural body CAD data is stored in an STL file format; secondly, a porous structural body CAD model is input into a quick forming system which is mainly used to control the scanning path of an electron beam, and the layering slicing processing of the CAD data is carried out by means of the Materialise's Magics software in the system so as to acquire the two-dimensional information data of the porous structural body and to carry out quick forming making; thirdly, the controllable porous structural body is welded on a predetermined position on the joint prosthesis by means of the laser welding technology so as to form the artificial joint prosthesis with locally controllable porous structure. The method overcomes the disadvantage that prosthesis self mechanical property is damaged during the prior making process of an artificial joint prosthesis surface porous structure.

Description

technical field [0001] The invention relates to an artificial joint in the technical field of medical devices and a preparation method thereof, in particular to a preparation method of an artificial joint prosthesis with a locally controllable porous structure. Background technique [0002] Artificial joint replacement is to repair the joint damage caused by disease or tumor, relieve joint pain, deformity and dysfunction, and rebuild a joint with a function close to normal. At present, artificial joint replacement, especially artificial hip and artificial knee replacement, is considered to be a very effective treatment. Since the prosthesis is implanted in the body for a long time, the ideal prosthesis material should have sufficient strength, toughness, fatigue resistance and wear resistance, and should have good biocompatibility and no toxic side effects. At present, the main materials used in artificial prosthesis handles are metal materials, including stainless steel, c...

Claims

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Application Information

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IPC IPC(8): A61F2/30G06F17/50B22F3/16A61L27/06A61L27/04
CPCA61F2/30771A61F2002/30001
Inventor 李祥王成焘
Owner SHANGHAI JIAO TONG UNIV
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