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Method for preparing porous tantalum medical implant material based on electron beam selective melting technology

A technology for selective melting and implantation of materials, which is applied in the fields of medical science, additive processing, and process efficiency improvement. Medical costs and surgical risks, achieving matching, and avoiding oxidation effects

Active Publication Date: 2018-01-19
广州赛隆增材制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is cumbersome, and the use of a large amount of organic additives can easily lead to excessive levels of impurity elements such as oxygen, carbon, and nitrogen in the porous tantalum implant material, which reduces the biocompatibility of the porous tantalum implant material and the biocompatibility during long-term use. stability

Method used

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  • Method for preparing porous tantalum medical implant material based on electron beam selective melting technology
  • Method for preparing porous tantalum medical implant material based on electron beam selective melting technology
  • Method for preparing porous tantalum medical implant material based on electron beam selective melting technology

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Experimental program
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Embodiment 1

[0038] This embodiment includes the following steps:

[0039] Step 1. Use MIMICS software to reconstruct the two-dimensional medical CT image to establish a three-dimensional rough model of porous tantalum medical implant material, and then use Pro / Engineer software and Magics software to sequentially perform the three-dimensional rough model of porous tantalum medical implant material Optimize and add to obtain a three-dimensional model of porous tantalum medical implant material, such as figure 1 Shown

[0040] Step 2: Use AutoFab software to slice the three-dimensional model of the porous tantalum medical implant material obtained in step 1 to obtain slice data, and then store slice data in STL format and import it into the electron beam selective melting equipment; The thickness of each slice of slice processing is 90μm;

[0041] Step 3: Load the tantalum powder into the powder bin of the electron beam selective melting equipment, and vacuum the molding chamber of the electron b...

Embodiment 2

[0049] This embodiment includes the following steps:

[0050] Step 1. Use MIMICS software to reconstruct the MRI data, establish a three-dimensional rough model of porous tantalum medical implant material, and then use Pro / Engineer software and Magics software to optimize and add the three-dimensional rough model of porous tantalum medical implant material in turn To obtain a three-dimensional model of porous tantalum medical implant material;

[0051] Step 2: Use NetFabb software to slice the three-dimensional model of the porous tantalum medical implant material obtained in step 1 to obtain slice data, and then store slice data in AMF format and import it into the electron beam selective melting equipment; The thickness of each slice of slice processing is 60μm;

[0052] Step 3: Load the tantalum powder into the powder bin of the electron beam selective melting equipment, and evacuate the forming chamber of the electron beam selective melting equipment to a vacuum of 3.0×10 -3 Pa;...

Embodiment 3

[0059] This embodiment includes the following steps:

[0060] Step 1. Use MIMICS software to reconstruct the two-dimensional medical CT image, establish a three-dimensional rough model of porous tantalum medical implant material, and then use Solidworks software and Magics software to optimize and optimize the three-dimensional rough model of porous tantalum medical implant material. Add to obtain a three-dimensional model of porous tantalum medical implant material;

[0061] Step 2: Use Magics software to slice the three-dimensional model of the porous tantalum medical implant material obtained in step 1 to obtain slice data, and then store the slice data in AMF format and import it into the electron beam selective melting equipment; The thickness of each slice of slice processing is 20μm;

[0062] Step 3: Load the tantalum powder into the powder bin of the electron beam selective melting equipment, and vacuum the molding chamber of the electron beam selective melting equipment to ...

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Abstract

The invention provides a method for preparing a porous tantalum medical implant material based on an electron beam selective melting technology. The method comprises the steps that firstly, software is utilized for reconstructing a two-dimensional medical CT image or MRI data, and a three-dimensional model of the porous tantalum medical implant material is obtained after structure optimization andsupporting addition processing are conducted on a three-dimensional rough model; and secondly, selective melting is conducted on tantalum powder by adopting electron beams according to shearing-layerdata of the three-dimensional model of the porous tantalum medical implant material, and then the porous tantalum medical implant material is obtained. According to the method for preparing the porous tantalum medical implant material based on the electron beam selective melting technology, the tantalum powder is melted and formed under the vacuum condition, and no additive is contained in the tantalum powder, so that the oxidation phenomenon after heating of tantalum is avoided, contamination of impurity elements such as carbon and oxygen is reduced, the requirement of the customized poroustantalum medical implant material is met, and meanwhile biological stability and biological compatibility of the porous tantalum medical implant material are improved. Post-processing processes such as sintering and annealing do not need to be conducted on the obtained porous tantalum medical implant material, and the method is convenient and efficient.

Description

Technical field [0001] The invention belongs to the field of preparation of porous medical metal implant materials, and specifically relates to a method for preparing porous tantalum medical implant materials based on electron beam selective melting technology. Background technique [0002] Porous tantalum is a foam-like porous metal with a pore size of 400μm~600μm, a porosity of 70%~80%, and an elastic modulus of about 3GPa, which is between human cancellous bone (0.1GPa~1.5GPa) and cortical bone Between 12GPa and 18GPa), it is much lower than titanium alloy (110GPa) and cobalt-chromium-molybdenum alloy (220GPa). In 1997, the US Food and Drug Administration (FDA) approved porous tantalum as a biomedical material for clinical treatment of artificial acetabulum. Compared with other biomedical metal materials, porous tantalum has the typical characteristics of high volume porosity, low elastic modulus and high surface friction coefficient, making it an ideal bone substitute materi...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/11A61L27/56A61L27/50A61L27/04B33Y10/00
CPCY02P10/25
Inventor 杨坤汤慧萍王建杨广宇刘楠贾亮
Owner 广州赛隆增材制造有限责任公司
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