Method for preparing porous tantalum medical implant material by selective laser sintering formation

A technology of laser selective sintering and implantation of materials, applied in medical science, prosthesis, etc., can solve the problems of inability to meet requirements, high requirements for tiny details, complex shapes of biological materials, etc., to achieve complete three-dimensional connected distribution, non-toxic dust , excellent biological safety effect

Active Publication Date: 2014-04-23
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 by selective laser sintering formation
  • Method for preparing porous tantalum medical implant material by selective laser sintering formation
  • Method for preparing porous tantalum medical implant material by selective laser sintering formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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

[0027] 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

[0028] Embodiment 3~7: carry out according to following steps and process parameter, all the other are the same as embodiment 1.

[0029]

[0030]

[0031]

[0032]

[0033] 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:

[0034] Example

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Abstract

The invention relates to a preparation method of a porous tantalum medical implant material. The preparation method comprises the following steps: by adopting pure tantalum powder with the particle size of not more than 10mu m as a raw material, directly performing selective laser sintering formation to form a human bone metal biomimetic material, wherein the thickness of powder spread in each layer during selective laser sintering is 60-80mu m; further sintering and cooling the formed human bone metal biomimetic material to obtain the porous tantalum medical implant material. The porous tantalum medical implant material with complete three-dimensional communication is obtained by sintering and cooling treatment of a formed blank prepared by selective laser sintering, and has a consistent microstructure with a bone tissue of a human body, so that the porous metal implant material has good biocompatibility and biological safety. The method provided by the invention further has the advantages of simple process equipment, low operation cost, no pollution in the whole preparation process, no side effect on a human body, capacity of ensuring the biological safety of the implant material and high forming speed, and is very conductive to industrial production and application.

Description

[0001] The application of the present invention is a divisional application with application number 201210022123.6, application date January 31, 2012, and the title of the invention "a method for preparing porous tantalum medical implant material by laser selective sintering molding". technical field [0002] 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 [0003] 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...

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
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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