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Method for preparing medical implant material multi-hole tantalum

An implant material and porous tantalum technology, which is applied in the field of preparation of porous medical implant materials, can solve the problems of insufficient purity of finished products, carbon skeleton residues, and reduced biological safety, so as to reduce impurity content, be easy to decompose, and improve purity. Effect

Active Publication Date: 2015-05-20
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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  • Method for preparing medical implant material multi-hole tantalum
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  • Method for preparing medical implant material multi-hole tantalum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Weigh 8 g of ethyl cellulose and put it into a container containing 240 ml of absolute ethanol; place it on an electric stove to heat and stir to make it an ethyl cellulose ethanol solution. Use a 200g balance to weigh 60g of tantalum powder with an average particle size of less than 10 microns and an oxygen content of less than 0.1% and 3.2g of starch, add 10ml of cooled ethyl cellulose ethanol solution, stir and mix evenly to make a slurry. Use 10×10×30mm porous polyurethane foam (average pore diameter is 0.48mm, density 0.025g / cm 3 , hardness 50) into it and cast until the pores of the polyurethane foam are filled with the slurry, then use clips to take out the polyurethane foam that has absorbed the slurry and put it into a porcelain plate. Dry in a vacuum drying oven at a drying temperature of 80° C., a drying time of 7 hours, and a vacuum degree of 1 Pa. Degreasing treatment: vacuum degree 1×10 -3 pa, the temperature is 600°C, and the holding time is ...

Embodiment 2

[0037] Example 2: Weigh 5 g of ethyl cellulose and put it into a container containing 200 ml of absolute ethanol; place it on an electric stove to heat and stir to make it an ethyl cellulose ethanol solution. Use a 200g balance to weigh 40g of tantalum powder with an average particle size of less than 10 μm and an oxygen content of less than 0.1% and 4.4g of starch, add 8ml of ethyl cellulose ethanol solution, stir and mix evenly to make a 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 slurry, then use clips to take out the polyurethane foam that has absorbed the slurry and put it into a porcelain plate. Dry in a vacuum drying oven, the drying temperature is 100 ° C, the drying time is 5 hours, and the vacuum degree is kept at 1×10 -1 Pa. Degreasing treatment: vacuum degree 1×10 -4 pa, temperature 800°C, holding time 140min. Vacuum...

Embodiment 3

[0040] Example 3: Weigh 6 g of ethyl cellulose and put it into a container with 220 ml of alcohol; place it on an electric stove to heat and stir to make it an ethyl cellulose alcohol solution. Use a 200g balance to weigh 45g of tantalum powder with an average particle size of less than 10μm and an oxygen content of less than 0.1% and 2.2g of starch, add 10ml of ethyl cellulose alcohol solution, stir and mix evenly to make a 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 slurry, then use clips to take out the polyurethane foam that has absorbed the slurry and put it into a porcelain plate. Dry in a vacuum drying oven, the drying temperature is 90 ° C, the drying time is 6 hours, and the vacuum degree is kept at 1×10 -1 pa. Degreasing treatment: the vacuum degree is lower than 1×10 -3 pa, temperature 400°C, holding time 1.5h. Vacuum ...

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Abstract

The invention provides a method for preparing medical implant material porous tantalum. The method includes the steps that a solution prepared from ethyl cellulose which is used as an organic binding agent and absolute ethyl alcohol which is used as a dispersing agent combines with mixed powder of starch and metal tantalum powder to prepare tantalum powder slurry, the tantalum powder is poured into organic foams, soaked until holes of the organic foams are filled with the tantalum powder slurry, and dried to remove the dispersing agent in the organic foams into which the tantalum powder slurry is poured, ungrease treatment is conducted under the inert gas shielding atmosphere to remove the organic binding agent and the organic foams, vacuum sintering is conducted to obtain porous sintering bodies, on a foam framework which is formed by stacking sintered pure tantalum powder, sintering neck structures exist among the tantalum powder particles, and then vacuum annealing and conventional after-treatment are conducted to obtain the porous tantalum. The medical implant porous tantalum material prepared from the method has good biocompatibility, safety, mechanical property and malleability and is especially suitable for being used as the medical implant material for human body parts with low bearing capacity.

Description

[0001] The application of the present invention is a divisional application with application number 201010547676.4, application date November 17, 2010, and the title of the invention "a method for preparing porous tantalum as a medical metal implant material". technical field [0002] The invention relates to a preparation method of a porous medical implant material, in particular to a preparation method of porous tantalum as a medical implant material. Background technique [0003] 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 nee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/04A61L27/56
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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