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Medical porous tantalum material for replacing dentale and preparation method thereof

A porous tantalum and dental bone technology is applied in the field of porous medical metal implant materials and their preparation, which can solve the problems affecting the processing and mechanical properties of porous tantalum materials such as ductility, compressive strength, and insufficient bending strength, so as to improve the biological phase. Compatibility and biosafety, good pore size uniformity and good biocompatibility

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 for compact bone tissue such as dental bone, has obvious deficiencies in mechanical properties such as ductility, compressive strength, and bending strength, and will affect subsequent research on porous tantalum. Processing of the material itself, such as cutting of molded parts, etc.

Method used

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  • Medical porous tantalum material for replacing dentale and preparation method thereof
  • Medical porous tantalum material for replacing dentale and preparation method thereof
  • Medical porous tantalum material for replacing dentale and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Weigh polyvinyl alcohol, tantalum powder with an average particle diameter of less than 43 microns and an oxygen content of less than 0.1% and sodium bicarbonate and mix them uniformly to form a mixed powder, wherein polyvinyl alcohol accounts for 8%, sodium bicarbonate accounts for 27%, tantalum Powder accounted for 65%, all in volume percentage. Compression molding: the above mixed powder is pressed into polyurethane foam (pore diameter 0.48-0.89mm, density 0.015g / cm2) in an injection molding machine at 80Mpa 3 ~0.035g / cm 3 , hardness greater than 50°) in molding. Degreasing treatment: vacuum degree 10 -4 Pa, from room temperature to 400°C at a heating rate of 2.5°C / min, and hold for 100 minutes; then raise the temperature from 400°C to 700°C at a heating rate of 2°C / min, and hold for 220 minutes. Vacuum sintering: sintering in a vacuum furnace, the sintering temperature is 2000°C, the heat preservation is 2 hours, and the vacuum degree is 10 -4 Pa, the...

Embodiment 2

[0032] Embodiment 2: Weigh polyvinyl alcohol, tantalum powder with an average particle size less than 43 microns and an oxygen content of less than 0.1%, and sodium bicarbonate and mix them uniformly to form a mixed powder, wherein polyvinyl alcohol accounts for 6%, sodium bicarbonate accounts for 29%, tantalum Powder accounted for 65%, all in volume percentage. Compression molding: Add the above mixed powder into an injection molding machine and press it under 70Mpa to a hole diameter of 0.56-0.72mm and a density of 0.025g / cm 3 , molded in polyurethane foam with a hardness of 50°-80°. Degreasing treatment: vacuum degree 10 -4 Pa, raise the temperature from room temperature to 400°C at a heating rate of 1°C / min, and hold for 60 minutes; then raise the temperature from 400°C to 800°C at a heating rate of 2.5°C / min, and hold for 180 minutes. Vacuum sintering: sintering in a vacuum furnace, the sintering temperature is 2100°C, the heat preservation is 4 hours, and the vacuum de...

Embodiment 3

[0034] Embodiment 3: Weigh polyvinyl alcohol, tantalum powder with an average particle diameter of less than 43 microns and an oxygen content of less than 0.1%, and sodium bicarbonate and mix them uniformly to form a mixed powder, wherein polyvinyl alcohol accounts for 10%, sodium bicarbonate accounts for 23%, tantalum Powder accounted for 67%, all by volume percentage. Compression molding: Add the above mixed powder into an injection molding machine and press it under 52Mpa to a hole diameter of 0.56-0.72mm and a density of 0.025g / cm 3 , molded in polyurethane foam with a hardness of 50°-80°. Degreasing treatment: vacuum degree 10 -4 Pa, raise the temperature from room temperature to 400°C at a heating rate of 3°C / min, and hold for 120 minutes; then raise the temperature from 400°C to 750°C at a heating rate of 1.5°C / min, and hold for 240 minutes. Vacuum sintering: sintering in a vacuum furnace, the sintering temperature is 2200°C, the heat preservation is 2.5 hours, and th...

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Abstract

The invention discloses a medical porous tantalum material for replacing dentale and a preparation method thereof. The material is prepared by mixing tantalum powder, polyvinyl alcohol and sodium hydrogen carbonate to form mixed powder, pressing the mixed powder to an organic foam body, molding, degreasing, sintering, cooling and performing heat treatment; and pressure adopted for pressing molding is 50 to 100MPa, the pore diameter of the formed medical porous tantalum material is 30 to 50 microns, and the porosity is 30 to 38 percent. The porous tantalum is prepared by adopting a pure physical die pressing method, so that the impurity content of the final porous tantalum material is extremely low, and biocompatibility and bio-safety are effectively improved; by testing, the impurity content of the material can be lower than 0.2 percent, the density can reach 10.34 to 11.67g / cm<3>, the porosity can reach 30 to 38 percent, and the pore diameter can reach 30 to 50 microns; and the elastic modulus can reach 4.5 to 6.0GPa, the bending strength can reach 120 to 130MPa, and the compressive strength can reach 100 to 140MPa. The porous tantalum is very suitable to be used as a medical implant material for replacing the dentale.

Description

technical field [0001] The invention relates to a porous medical metal implant material and a preparation method thereof, in particular to a medical implant porous tantalum material replacing compact bone tissue and a preparation method thereof. Background technique [0002] Porous medical metal implant materials have important and special uses in the treatment of bone tissue trauma, femoral tissue necrosis, and replacement of dense bone tissue such as dental bone. 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/04A61L27/56C22C1/08C22C27/02
CPCB22F3/1121A61L2430/02A61L27/047A61L27/04A61L27/56C22C1/08C22C27/02
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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