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Preparation method for medical porous tantalum material

A technology of porous tantalum and tantalum powder, applied in medical science, prosthesis, tissue regeneration, etc., can solve problems affecting the processing of porous tantalum materials, mechanical properties such as insufficient ductility, etc.

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

However, porous tantalum, which is used as a medical implant material such as dense bone tissue such as teeth, has obvious deficiencies in the mechanical properties of the material, such as ductility, and will affect the subsequent processing of the porous tantalum material itself, such as molding parts. cutting etc.

Method used

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  • Preparation method for medical porous tantalum material
  • Preparation method for medical porous tantalum material
  • Preparation method for medical porous tantalum material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Weigh 12.2 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°), the tantalum powder slurry was poured into it by vibrating pressure at 55 times / min and 0.1Mpa. 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 10 -4 Pa, temperature 600°C, holding time 120 minutes. Vacuum sintering: sintering in a vacuum furnace, the sintering temperatu...

Embodiment 2

[0025] 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°), the tantalum powder slurry was poured into it by vibrating pressure at 60 times / min and 0.08Mpa. 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, temperature 800°C, holding time 120 minutes. Vacuum sintering: sintering in a vacuum furnace, the sintering temperature is 2100°C, the ...

Embodiment 3

[0027] 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°), the tantalum powder slurry was poured into it by vibrating pressure method at 80 times / min and 0.2Mpa. 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, temperature 700°C, holding time 90 minutes. Vacuum sintering: sintering in a vacuum furnace, the sintering temperature is 2200°C, th...

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Abstract

The invention discloses a preparation method for a medical porous tantalum material. The method is characterized by comprising the following steps of: mixing a poly ethanol aqueous solution and tantalum powder to obtain slurry, wherein the mass concentration of the poly ethanol aqueous solution is 2 to 8 percent, and the vibrating frequency is 20 to 80 times / minute; pouring the slurry into an organic foam through vibrating and pressurizing; drying; degreasing; sintering; cooling; and performing thermal treatment to obtain the medical porous tantalum material. The prepared porous tantalum is very suitable to be used for the medical implant material for replacing bearing bone tissues, and biocompatibility and the mechanical property are guaranteed simultaneously. Moreover, according to the preparation method, a process is simple; the preparation method is easy to control; and in the whole preparation process, harmness, pollution, toxicity and dust, and toxic and side effects on a human body can be avoided, and the method is suitable for industrial large-scale production. In the preparation process, the agents and the organic foam which can be fully decomposed and do not have residues in the sintering process are adopted preferentially; and the biosecurity of the implant material can be guaranteed.

Description

technical field [0001] The invention relates to a preparation method of a porous medical metal implant material, in particular to a preparation method of a medical implant material porous tantalum. Background technique [0002] Porous medical metal implant materials have important and special purposes such as treating bone tissue trauma, femoral tissue necrosis, and replacing dense bone tissue such as teeth. 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 it should be consistent with the growth of human bone tissue as needed. , and reduce the weight of the material itself, so that it is suitable for human implantation. [0003] As for the refractory metal tantalum, due to its excellent biocompatibility, its porous material is e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C27/02A61L27/04A61L27/56
CPCB22F3/1137B22F3/1125A61L2430/02A61L27/04B22F3/24A61L27/56A61L27/047C22C1/08C22C27/02B22F3/1021
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD