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Porous tantalum serving as medical metal implanted material and preparation method thereof

An implant material and porous tantalum technology, applied in the field of porous medical metal implant materials, can solve the problems of insufficient finished product purity, carbon skeleton residues, and reduced biological safety, and achieve improved ductility, simple process, and guaranteed biocompatibility. Effects of Sexuality and Biosecurity

Active Publication Date: 2011-10-05
CHONGQING RUNZE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of its preparation method, the purity of the obtained finished product is not enough, and there are carbon skeleton residues, resulting in a decrease in biological safety

Method used

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  • Porous tantalum serving as medical metal implanted material and preparation method thereof
  • Porous tantalum serving as medical metal implanted material and preparation method thereof
  • Porous tantalum serving as medical metal implanted material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Weigh 12.5 g of polyvinyl alcohol and put it into a container with 240 ml of distilled water; place it on an electric stove to heat and stir to make it into an aqueous solution of polyvinyl alcohol. Use a 200g balance to weigh 60g of tantalum powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1%, add 50ml of cooled polyvinyl alcohol aqueous solution, stir and mix evenly, and make it into a tantalum powder slurry. Use 10×10×30mm porous polyurethane foam (average pore diameter is 0.48mm, density 0.025g / cm 3 , hardness 50°) into it and pour until the pores of the polyurethane foam are filled with the tantalum powder slurry, then use a clamp to take out the polyurethane foam filled with the tantalum powder slurry and put it into a porcelain plate. Dry in a vacuum drying oven at a drying temperature of 60° C., a drying time of 8 hours, and a vacuum degree of 1 Pa. Degreasing treatment: the vacuum degree is lower than...

Embodiment 2

[0039] Example 2: Weigh 10 g of polyvinyl alcohol and put it into a container with 200 ml of distilled water; place it on an electric stove to heat and stir to make it into an aqueous solution of polyvinyl alcohol. Use a 200g balance to weigh 40g of tantalum powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1%, add 32ml of polyvinyl alcohol aqueous solution, stir and mix evenly, and make it into a tantalum powder slurry. Use 10×10×25mm porous polyurethane foam (average pore diameter is 0.56mm, density 0.030g / cm 3 , hardness 60°) into it and pour until the pores of the polyurethane foam are filled with the tantalum powder slurry, then use a clamp to take out the polyurethane foam filled with the tantalum powder slurry and put it into a porcelain plate. Dry in a vacuum drying oven at a drying temperature of 100°C for a drying time of 4 hours and maintain a vacuum of 10 -2 Pa. Degreasing treatment: vacuum degree 10 -4 Pa, tempera...

Embodiment 3

[0042] Example 3: Weigh 11 g of polyvinyl alcohol and put it into a container with 220 ml of distilled water; place it on an electric stove to heat and stir to make it into an aqueous solution of polyvinyl alcohol. Use a 200g balance to weigh 45g of tantalum powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1%, add 36ml of polyvinyl alcohol aqueous solution, stir and mix evenly, and make it into a tantalum powder slurry. Use 8×8×25mm porous polyurethane foam (average pore diameter is 0.70mm, density 0.035g / cm 3 , hardness 70°) into it and pour until the pores of the polyurethane foam are filled with the tantalum powder slurry, then use a clamp to take out the polyurethane foam filled with the tantalum powder slurry and put it into a porcelain plate. Dry in a vacuum drying oven at a drying temperature of 80°C for a drying time of 6 hours and maintain a vacuum of 10 -1 Pa. Degreasing treatment: vacuum degree 10 -3 Pa, temperatur...

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Abstract

The invention relates to porous tantalum serving as a medical metal implanted material and a preparation method thereof. The porous tantalum has a pore three-dimensional communicating distribution foam structure, wherein a solution which is prepared from an organic adhesive and a dispersant and tantalum powder are adopted to prepare a tantalum powder slurry; the tantalum powder slurry is poured into an organic foam body and soaked until the tantalum powder slurry is filled in the pores of the organic foam body, drying is carried out so as to remove the dispersant in the organic foam body which is poured with the tantalum powder slurry, and ungreased treatment is carried out in the presence of inert gas so as to remove the organic adhesive and the organic foam body, and vacuum sintering is carried out so as to prepare the porous sintered body; on a foam framework which is formed by accumulated sintered pure tantalum powder, and a sintering neck structure exists among tantalum powder particles; and the tantalum powder is annealed in vacuum and subjected to conventional post-treatment. The porous tantalum has the advantages of high porosity, uniform and communicated porous distribution, uniform sintered microstructure particles, remarkable sintering neck, ensured excellent chemical performance and especially excellent ductibility.

Description

technical field [0001] The invention relates to a porous medical metal implant material, in particular to a porous tantalum used as a medical implant material and a preparation method thereof. Background technique [0002] Porous medical metal implant materials have important and special purposes such as treating bone tissue trauma and femoral tissue necrosis. The common materials of this type include porous 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, because of its excellent bioco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/04A61L27/56C22C1/08C22C27/02
CPCA61L27/56A61L27/047B22F3/1137B22F3/1146A61L2400/08B22F2003/248B22F2998/10B22F2999/00Y10T428/12153B22F3/1021B22F2201/20B22F1/107
Inventor 阮建明叶雷谢健全王志强游潮荣祖元冯华周健节云峰
Owner CHONGQING RUNZE PHARM CO LTD
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