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Method for preparing stainless steel biological porous implant material by selective laser sintering

A technology of implant materials and laser sintering, which is applied in the field of preparation of biomedical metal materials, achieves the effect of high forming precision, no pollution, and easy removal

Inactive Publication Date: 2012-08-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few studies on the preparation of porous materials by SLS technology, especially there are no public reports on the preparation of biomedical porous metal implant materials by sintering film-coated powder by SLS technology.

Method used

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  • Method for preparing stainless steel biological porous implant material by selective laser sintering
  • Method for preparing stainless steel biological porous implant material by selective laser sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] (1) First weigh 500g of -200 mesh 316L stainless steel powder and 15g of high-density polyethylene powder; then add high-density polyethylene into the kneader and heat it. After it is completely melted, add 316L stainless steel powder and stir while heating 30min, so that the surface of the stainless steel particles is completely covered by high-density polyethylene; finally, through mechanical crushing and sieving to obtain -150 mesh coated 316L stainless steel powder;

[0026] (2) Firstly, CAD software is used to construct the three-dimensional structure of the implanted material, and after being sliced, it is transported to the SLS forming machine in STL format; then, the coated 316L stainless steel powder is laid on the workbench of the SLS forming machine, and heated by a laser Preheat to 60°C for 2 minutes, and then according to the slice information, the laser performs selective sintering on the powder bed with the process parameters of 15W laser power, 0.10mm sca...

Embodiment approach 2

[0030](1) First weigh 500g of -250mesh 316L stainless steel powder and 35g of polystyrene powder; then add polystyrene into the kneader and heat it. After it is completely melted, add 316L stainless steel powder and stir for 50 minutes while heating. The surface of the stainless steel particles is completely covered by polystyrene; finally, the -180 mesh coated 316L stainless steel powder is obtained by mechanical crushing and sieving;

[0031] (2) Firstly, CAD software is used to construct the three-dimensional structure of the implanted material, and after being sliced, it is transported to the SLS forming machine in STL format; then, the coated 316L stainless steel powder is laid on the workbench of the SLS forming machine, and heated by a laser Preheat to 90°C for 8 minutes, and then according to the slice information, the laser performs selective sintering on the powder bed with the process parameters of 25W laser power, 0.20mm scanning distance, 0.20mm slice thickness and...

Embodiment approach 3

[0035] (1) First weigh 500g of -400mesh 316L stainless steel powder and 25g of polyamide powder; then add polyethylene into the kneader and heat it. After it is completely melted, add 316L stainless steel powder and stir for 40 minutes while heating to make the stainless steel The surface of the particles is completely covered by polyethylene; finally, the -270 mesh coated 316L stainless steel powder is obtained through mechanical crushing and sieving;

[0036] (2) Firstly, CAD software is used to construct the three-dimensional structure of the implanted material, and after being sliced, it is transported to the SLS forming machine in STL format; then, the coated 316L stainless steel powder is laid on the workbench of the SLS forming machine, and heated by a laser Preheat to 70°C for 5 minutes, and then according to the slice information, the laser performs selective sintering on the powder bed with the process parameters of 30W laser power, 0.15mm scanning distance, 0.15mm sl...

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Abstract

The invention belongs to the field of biological medical porous metal implant materials, and provides a method for preparing a stainless steel biological porous implant material by selective laser sintering, which comprises the following steps: preparing thermoplastic polymer coated 316L stainless steel powder by a film coating method, and forming the powder by a selective laser sintering technique, thereby quickly preparing the biological medical porous metal implant material. The film coating technique mainly comprises the following steps: melting the thermoplastic polymer, coating the stainless steel powder, pulverizing, and screening the coated stainless steel powder. The method is simple and feasible; the coated 316L stainless steel powder has the advantages of favorable sintering property and high adhesive strength; and the selective laser sintering technology is utilized to form the coated stainless steel powder, and the after-treatment of degreasing and secondary sintering is combined to prepare the porous metal implant material. The microstructure and mechanical properties of the stainless steel biological porous implant material can be flexibly controlled by adjusting the technological parameters of the selective laser sintering and after-treatment, thereby achieving the goal of matching with natural bones. The technology has significant application value in the field of preparation of biological medical porous metal implant materials.

Description

technical field [0001] The invention relates to a preparation method of a biomedical metal material, in particular to rapidly preparing a biomedical porous metal implant material by adopting a selective laser sintering technology. Background technique [0002] In recent years, with the improvement of living standards and the development of medical services, human beings have entered the age of aging, which has led to an increasing number of people suffering from various joint diseases, and the demand for artificial joints has also increased rapidly, especially for total hip joints and total knee joints. Joint replacement surgeries are on the rise. Total hip replacements are forecast to grow at a rate of 174% to 572,000 by 2030, while total knee replacements will grow at a rate of 673% to 34,800,000. At the same time, surgical revisions of total hip and total knee are on the rise. It is estimated that from 2005 to 2030, total hip and total knee revision surgeries will gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08A61L27/56A61L27/04
Inventor 何新波颉芳霞路新曲选辉
Owner UNIV OF SCI & TECH BEIJING
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