Medical porous metal material for replacing dentale and preparation method thereof

A technology of porous metal and dental bone, applied in medical science, prosthesis, tissue regeneration, etc., can solve the problems of mechanical properties such as insufficient ductility, affecting the processing of porous tantalum materials, etc., to improve biocompatibility and biosafety , Good pore size uniformity of finished products, high qualified rate of finished products

Active Publication Date: 2014-08-06
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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  • Medical porous metal material for replacing dentale and preparation method thereof
  • Medical porous metal material for replacing dentale and preparation method thereof
  • Medical porous metal material for replacing dentale and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 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: Add the above mixed powder into an injection molding machine and press it into a polyurethane foam (pore diameter 0.48-0.89mm, density 0.015g / cm2) at 75Mpa 3 ~0.035g / cm 3 , hardness greater than 50°) in molding. Degreasing treatment: vacuum degree 10 -4 Pa, with argon as a protective atmosphere, the temperature was raised from room temperature to 400°C at a heating rate of 2.0°C / min, and held for 90 minutes; then the temperature was raised from 400°C to 700°C at a heating rate of 2.0°C / min, and the holding time was 210 minutes. Vacuum sintering: vacuum degree is 10 -4 Pa~10 -3 Pa, heat up t...

Embodiment 2

[0028] Embodiment 2: 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 5%, sodium bicarbonate accounts for 20%, tantalum Powder accounts for 75%, all in volume percentage. Compression molding: Add the above mixed powder into an injection molding machine and press it into a polyurethane foam (pore diameter 0.48-0.89mm, density 0.015g / cm2) at 80Mpa 3 ~0.035g / cm 3 , hardness greater than 50°) in molding. Degreasing treatment: vacuum degree 10 -4 Pa, with argon as a protective atmosphere, the temperature was raised from room temperature to 400°C at a heating rate of 0.5°C / min, and kept for 60 minutes. Vacuum sintering: vacuum degree is 10 -4 Pa~10 -3 Pa, heat up to 1500°C at 10°C / min, hold for 120min, cool with the furnace to 200-300°C, then heat up to 1600°C at 20°C / min, hold for...

Embodiment 3

[0030] Embodiment 3: Weigh polyvinyl alcohol, tantalum powder with an average particle diameter 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 30%, tantalum Powder accounts for 60%, all in volume percentage. Compression molding: Add the above mixed powder into an injection molding machine and press it into a polyurethane foam (pore diameter 0.48-0.89mm, density 0.015g / cm2) at 95Mpa 3 ~0.035g / cm 3 , hardness greater than 50°) in molding. Degreasing treatment: vacuum degree 10 -4 Pa, with argon as the protective atmosphere, the temperature was raised from room temperature to 700°C at a heating rate of 3°C / min, and kept for 240min. Vacuum sintering: vacuum degree is 10 -4 Pa~10 -3 Pa, heat up to 1600°C at 20°C / min, hold for 240min, cool with the furnace to 200-300°C, then heat up to 1500°C at 10°C / min, hold for 240mi...

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Abstract

A medical porous metal material for replacing tooth bone, obtained by the steps of: mixing tantalum powder, polyvinyl alcohol and sodium bicarbonate to form a mixed powder; compacting the mixed powder into an organic foam body and forming under 50-100Mpa; degreasing, sintering, cooling and thermal treatments; the sintering step specifically comprises: under 10-4Pa to 10-3Pa of vacuum pressure, heating to 1500-1800°C at 10-20°C / min, maintaining the heat for 120-240min, cooling in a furnace to 200-300°C; then heating again to 1500-1800°C at 10-20°C / min, maintaining the heat for 180-240min; and heating to 2000-2200°C at 5-10°C / min, and maintaining the heat for 120-360min. The medical porous tantalum material formed has a pore diameter of 15-28mum, a porosity of 20-35%, a bending strength of 130-140Mpa, and a compressive strength of 140-170Mpa. The porous tantalum of the present invention is extraordinarily suitable to replace the tooth bone as a medical implant material.

Description

technical field [0001] The invention relates to a porous medical metal implant material and a preparation method thereof, in particular to a medical porous metal implant material replacing compact bone tissue and a preparation method thereof. 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] The refractory metal tantalum / niobium, because of its ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/04A61L27/56C22C1/08C22C27/02
CPCC22C1/08B22F3/1125B22F2998/10A61L27/047A61L27/56C22C27/02A61L2430/12B22F2999/00
Inventor 节云峰叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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