Preparation method of medical porous metal implant material

A technology of implant materials and porous metals, which is applied in the field of preparation of medical metal implant materials, can solve the problems of mechanical properties such as ductility, compressive strength, insufficient bending strength, and affect the processing of porous tantalum materials, so as to improve biocompatibility and biological safety, good pore size uniformity of finished products, and high qualified rate of finished products

Active Publication Date: 2014-04-23
CHONGQING RUNZE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 ducti

Method used

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  • Preparation method of medical porous metal implant material

Examples

Experimental program
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Example Embodiment

[0024] Example 1: Weigh paraffin, tantalum powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1% and ethyl cellulose and mix them uniformly to form a mixed powder, wherein paraffin wax accounts for 8%, ethyl cellulose accounts for 27%, and tantalum powder accounts for 27%. 65%, all by volume percentage. Granulation: The mixed powder is granulated into round particles with a particle size of 10-13 μm at a working temperature of 510-520° C. and a working pressure of 12-13 MPa. Injection molding: the temperature of injecting the round particles into the mold is 465-490° C. and the pressure is 83-85 MPa. Demoulding time: 6 to 7S. Degreasing treatment: vacuum degree 10 -4 Pa, rise from room temperature to 400°C at a rate of 1-3°C / min, hold for 60-120min, rise from 400°C to 600-800°C at a rate of 1.5-2.5°C / min, hold for 180-240min. Vacuum sintering: vacuum degree is 10 -4 Pa~10 -3 Pa, heat up to 1800°C at 13°C / min, hold for 200min,...

Example Embodiment

[0026] Embodiment 2: Weigh polyvinyl alcohol, tantalum powder with an average particle size 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 6%, sodium bicarbonate accounts for 29%, tantalum Powder accounts for 65%, all in volume percentage. Granulation: The mixed powder was granulated into round particles with a particle size of 20 μm at a working temperature of 450° C. and a working pressure of 15 MPa. Injection molding: the temperature of injecting the round particles into the mold is 540° C. and the pressure is 90 MPa. Demoulding time: 9S. Degreasing treatment: vacuum degree 10 -4 Pa, heated from room temperature to 400°C at a heating rate of 1°C / min and held for 60 minutes; and then heated from 400°C to 800°C at a heating rate of 2.5°C / min for 180 minutes. Vacuum sintering: sintering step: vacuum degree 10 -4 Pa, heat up to 1800°C at 20°C / min, ho...

Example Embodiment

[0028] Example 3: Weigh zinc stearate, tantalum powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1% and methyl cellulose and mix them uniformly to form a mixed powder, wherein zinc stearate accounts for 10% and methyl cellulose accounts for 10%. 23%, tantalum powder accounts for 67%, all in volume percentage. Granulation: The mixed powder was granulated into round particles with a particle size of 10 μm at a working temperature of 650° C. and a working pressure of 12 MPa. Injection molding: the temperature of injecting the round particles into the mold is 380° C. and the pressure is 72 MPa. Demoulding time: 6S. Degreasing treatment: vacuum degree 10 -4 Pa, from room temperature to 400°C at a heating rate of 3°C / min, and holding for 120 minutes; then from 400°C to 750°C at a heating rate of 1.5°C / min, holding time for 240 minutes; sintering: the degree of vacuum is 10 -3 Pa, heat up to 1500°C at 10°C / min, hold for 120min, cool...

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Abstract

The invention relates to a preparation method of a medical porous metal implant material. The method comprises the following steps: mixing tantalum powder with a pore former and a forming agent so as to form mixed powder; and performing granulation, injection mould forming, demoulding, degreasing, sintering and heat treatment on the mixed powder so as to prepare the medical porous metal implant material capable of replacing a dentale tissue, wherein the pore former is one or more of sodium bicarbonate, urea, sodium chloride, methylcellulose and ethyecellulose; the forming agent is one or more of polyvinyl alcohol, stearic acid, zinc stearate, paraffin and synthetic rubber; the degreasing process is performed under the conditions of gradually heating to 400 DEG C to 800 DEG C according to the speed rate of 0.5 DEG C/minute to 3 DEG C/minute, forming a protective atmosphere in an argon leading-in mode and carrying out heat preservation for 60 to 240 minutes; the sintering process and the heat treatment process are effectively improved. Thus, the mechanical property of the prepared medical porous metal implant material is greatly improved. As a result, the prepared medical porous metal implant material is very suitable for replacement of the dentale tissue.

Description

[0001] The application of the present invention is a divisional application with the application number 201110296596.0, the application date of September 29, 2011, and the title of the invention "a preparation method of a medical porous metal implant material". technical field [0002] The invention relates to a preparation method of a medical metal implant material, in particular to a preparation method of a medical porous metal implant material. Background technique [0003] 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 co...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C27/02A61L27/04A61L27/56
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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