Method for preparing porous tantalum medical implant material through selective laser sintering forming

A technology of laser selective sintering and implantation of materials, applied in the fields of additive manufacturing, additive processing, medical science, etc., can solve the problems of complex shapes of biological materials, inability to meet requirements, and high requirements for small details, and achieve complete three-dimensional connectivity distribution, Excellent biosafety, non-toxic dust effect

Active Publication Date: 2012-11-28
CHONGQING RUNZE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest feature of biomaterials is the complex shape and high requirements for tiny details. Therefore, high requirements are placed on the molding technology. However, the traditional molding technology cannot meet the requirements due to the limitation of the mold.

Method used

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  • Method for preparing porous tantalum medical implant material through selective laser sintering forming
  • Method for preparing porous tantalum medical implant material through selective laser sintering forming
  • Method for preparing porous tantalum medical implant material through selective laser sintering forming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a porous tantalum medical implant material. The pure tantalum powder with a particle size of 5 μm is delivered to a three-dimensional printing platform, rolled and laminated, and the sample size to be prepared is designed to be φ10×100mm, and its UG file Input into the molding equipment, and carry out laser selective sintering molding. The computer controls the two-dimensional scanning trajectory of the laser beam according to the slicing model of the prototype, and selectively sinters the delivered pure tantalum powder to form a layer of the part. After a layer of powder is completed, the working piston is lowered by 50 μm, and the powder spreading system is covered with new tantalum. Powder, the thickness of each layer of powder coating is 80 μm, control the laser beam and then scan and sinter the new layer, repeat this cycle, layer by layer, until the three-dimensional sample is formed. Then take out the molded sample, put it into a vacuum furn...

Embodiment 2

[0026] A preparation method of porous tantalum medical implant material, transporting pure tantalum powder with a particle size of 10 μm to a three-dimensional printing platform, rolling and laminating, designing the sample size to be prepared as φ10×100mm, and uploading its UG file Input into the molding equipment, and carry out laser selective sintering molding. The computer controls the two-dimensional scanning trajectory of the laser beam according to the slicing model of the prototype, and selectively sinters the delivered pure tantalum powder to form a layer of the part. After a layer of powder is completed, the working piston is lowered by 50 μm, and the powder spreading system is covered with new tantalum. powder, control the laser beam and then scan and sinter the new layer, and so on, and the layers are superimposed until the three-dimensional sample is formed; during the laser selective sintering process, the laser power is 65W, the scanning speed is 15mm / s, and the ...

Embodiment 3～7

[0027] Embodiment 3~7: carry out according to following steps and process parameter, all the other are the same as embodiment 1.

[0028]

[0029]

[0030]

[0031]

[0032] The obtained porous tantalum finished product is three-dimensionally completely connected, the pores are evenly distributed, and the biocompatibility is good. The test results according to the aforementioned method are as follows:

[0033] Example

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PUM

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Abstract

The invention discloses a method for preparing a porous tantalum medical implant material. The method comprises the following steps of: directly performing selective laser sintering on pure tantalum powder of which the particle size is less than or equal to 10 mu m and which is used as a raw material to form a human bone metal biomimetic material, wherein the thickness of powder paved on each layer during selective laser sintering is 60 to 80 mu m; and sintering and cooling the human bone metal biomimetic material to obtain the porous tantalum medical implant material. Forming blank prepared by selective laser sintering is sintered and cooled so as to obtain the porous tantalum medical implant material of which pores are completely communicated in a three-dimensional way and the structure is consistent with a microstructure of a bone tissue of a human body; the porous medical implant material is high in biocompatibility and biosecurity; and the method also has the advantages that process equipment is simple, operation cost is low, pollution is avoided in the whole preparation process, the toxic and side effects on the human body can be avoided, the biosecurity of the implant material can be guaranteed, the forming speed is high, and the porous tantalum medical implant material can be industrially produced and applied.

Description

technical field [0001] The invention relates to the field of preparation of porous medical metal implant materials, in particular to a method for preparing porous medical metal implant materials by laser selective sintering technology. Background technique [0002] Porous medical metal implant materials have important and special uses in the treatment of bone tissue trauma and femoral tissue necrosis. Common materials of this type include metal stainless steel and porous metal titanium. As a porous implant material used in the treatment of bone tissue trauma and femoral tissue necrosis, its porosity should reach 30-80%, and the pores should be all connected and evenly distributed, or partially connected and evenly distributed according to the needs, so that it can be connected with The growth of bone tissue in the human body is consistent, and the weight of the material itself is reduced, so that it is suitable for human implantation. [0003] The refractory metal tantalum,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C27/02B22F3/11A61L27/04A61L27/56
CPCB22F3/1055A61L2430/02B22F3/11B22F2301/20A61L27/04A61L27/56A61L27/047C22C1/08C22C27/02B33Y80/00B33Y70/00Y02P10/25B22F10/28B22F10/368B22F10/66B22F10/32B22F10/36B22F10/366
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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