Medical metal implant material porous niobium and preparation method thereof

An implant material and porous niobium technology, applied in the field of porous medical metal implant materials, can solve the problems of insufficient finished product purity, reduced biosafety, carbon skeleton residue, etc., to improve ductility, simple process, and ensure biocompatibility. and biosafety effects

Inactive Publication Date: 2011-11-30
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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  • Medical metal implant material porous niobium and preparation method thereof
  • Medical metal implant material porous niobium and preparation method thereof
  • Medical metal implant material porous niobium 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 niobium powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1%, add 15ml of cooled polyvinyl alcohol aqueous solution, stir and mix evenly, and make it into a niobium 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 niobium powder slurry, then clamp the polyurethane foam filled with the niobium 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 1×10 -3 Pa, temperat...

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 niobium powder with an average particle size of less than 43 μm and an oxygen content of less than 0.1%, add 10ml of polyvinyl alcohol aqueous solution, stir and mix evenly, and make it into a niobium 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 niobium powder slurry, then clamp the polyurethane foam filled with the niobium powder slurry and put it into the porcelain plate. Dry in a vacuum drying oven at a drying temperature of 80°C for a drying time of 4 hours and maintain a vacuum of 1×10 -2 Pa. Degreasing treatment: the vacuum degree is lower than 1×10 -3 Pa, temperature...

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 niobium powder with an average particle size of less than 43 μm and an oxygen content of less than 0.1%, add 12ml of polyvinyl alcohol aqueous solution, stir and mix evenly, and make it into a niobium 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 niobium powder slurry, and the polyurethane foam filled with the niobium powder slurry is taken out with clips and put into the porcelain plate. Dry in a vacuum drying oven, the drying temperature is 80 ° 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×...

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Abstract

A porous niobium used as medical implant material is of a foam structure with three dimensional interconnecting pores. There is a sintering neck structure between the niobium particles. The method for preparing the porous niobium comprises the steps of using the niobium powder and the solution prepared by mixing an organic binder and a dispersant to obtain the niobium slurry, casting the niobium slurry into an organic foam body to immerse until the pores of the organic foam body are full of the niobium slurry, drying to remove the dispersant in the organic foam body in which the niobium slurry is cast, degreasing to remove the organic binder and the organic foam body in the protective environment of inert gas, and then vacuum sintering to obtain the porous sintered body. The porous niobium is of high porosity and good ductility.

Description

technical field [0001] The invention relates to a porous medical metal implant material, in particular to a porous niobium 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 niobium, because of its excellent biocompatibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/04A61L27/56C22C1/08
CPCA61L27/56A61L27/047
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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