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Preparation method of porous niobium for medical implant material

An implant material and porous niobium technology, which is applied in the field of preparation of porous niobium implant materials, can solve the problems of carbon skeleton residue, insufficient purity of finished products, and reduced biological safety, and achieve easy decomposition, reduce impurity content, and improve purity. Effect

Active Publication Date: 2014-10-22
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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  • Preparation method of porous niobium for medical implant material
  • Preparation method of porous niobium for medical implant material
  • Preparation method of porous niobium for medical implant material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 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 niobium powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1% and 4g of starch, add 15ml of cooled ethyl cellulose ethanol solution, stir and mix evenly, making it a mixed 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 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 60° C., a drying time of 6 hours, and a vacuum degree of 1 Pa. Degreasing treatment: the vacuum degree is lower than 1×10 -3 pa, the temperature is 600°C, and...

Embodiment 2

[0035] Example 2: Weigh 6 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 niobium powder with an average particle size of less than 43μm and an oxygen content of less than 0.1% and 2.15g of starch, add 10ml of ethyl cellulose ethanol solution, stir and mix evenly to make a mixed 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 at a drying temperature of 70°C, a drying time of 4 hours, and a vacuum degree of 1×10 -2 Pa. Degreasing treatment: the vacuum degree is lower than 1×10 -3 pa, temperature 800°C, holding time 2.5h....

Embodiment 3

[0038] Example 3: Weigh 9 g of ethyl cellulose and put it into a container containing 220 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 45g of niobium powder with an average particle size of less than 43 μm and an oxygen content of less than 0.1% and 2.5g of starch, add 12ml of ethyl cellulose ethanol solution, stir and mix evenly to make a mixed slurry. Choose 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 a clamp to take out the polyurethane foam filled with niobium powder slurry and put it into a porcelain plate. Dry in a vacuum drying oven, the drying temperature is 68 ° 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, the temperature...

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Abstract

A preparation method of a medical implant material porous niobium comprises the following steps: preparing ethyl cellulose as an organic binder and absolute ethanol as a dispersant into a solution; mixing the solution with mixed powder composed of starch and niobium powder with the mean particle diameter of less than 43 microns and the oxygen content of less than 0.1% to prepare niobium powder slurry; pouring; dipping in an organic foam; drying, degreasing in an inert gas atmosphere; sintering under vacuum to obtain a porous sintered body having sintering neck structures between the sintered niobium powder particles; and annealing under vacuum; and performing conventional posttreatment to obtain the porous niobium, wherein in the mixed powder of the metal niobium powder and the starch, the starch content is 5-10%. The prepared medical metal implant material porous niobium has excellent biocompatibility and bio-safety; the porous niobium has the sintering neck structures, so that the ductility and other mechanical properties of the porous niobium are improved; and a very good method is provided for convenient and effective application of the porous niobium to medical metal implantation.

Description

[0001] The application of the present invention is a divisional application with the application number 201010563419.X, the application date of November 29, 2010, and the title of the invention "Preparation method of porous niobium for medical metal implant material". technical field [0002] The invention relates to a preparation method of porous niobium as a medical implant material, in particular to a preparation method of a porous niobium implant material suitable for light-bearing parts of a human body. 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 partial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/04A61L27/56B22F3/11
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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