Porous medical tantalum implant material and preparation method thereof

An implant material, porous tantalum technology, applied in the field of preparation of medical porous metal materials, can solve the problems of lower mechanical properties of products, limited thickness of tantalum coating, uneven pore size, etc., and achieve high porosity and connected porosity , no cytotoxicity, uniform pore effect

Active Publication Date: 2014-01-01
赵德伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the high melting point of tantalum, the traditional powder loose sintering method is difficult to process, and the porosity of the prepared material is low, the pore size is uneven and the closed porosity is high.
The method of chemical vapor deposition is a feasible method to prepare porous tantalum metal, but the thickness of tantalum coating is

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation of a medical porous tantalum implant material, comprising the steps of:

[0028] (1) Etch the graphite carbon skeleton with a porosity of 85% and a pore diameter of 500 μm with dilute hydrochloric acid (hydrochloric acid concentration is 10%) for 10 minutes, wash it with water and ethanol in turn, dry it with nitrogen, and put it into the reaction chamber;

[0029] (2) Put carbon pentachloride powder with a particle size of 400 mesh into the source tank, heat it to 150°C, and pass it into the reaction chamber with high-temperature argon (300°C) as the carrier gas, and the flow rate of the carrier gas is 100ml / min , the temperature of the reaction chamber is 1050°C, and the vacuum degree of the reaction chamber is 10Pa; while the tantalum pentachloride powder is passed into the reaction chamber with argon as the carrier gas, hydrogen is passed into the reaction chamber at a flow rate of 120ml / min, and the reduction reaction is carried out for 4 hours. The t...

Embodiment 2

[0032] A preparation of a medical porous tantalum implant material, comprising the steps of:

[0033] (1) Etch the graphite carbon skeleton with a porosity of 80% and a pore diameter of 400 μm with dilute hydrochloric acid (hydrochloric acid concentration: 10%) for 10 minutes, wash it with water and ethanol in turn, dry it with nitrogen, and place it in the reaction chamber;

[0034] (2) Put carbon pentachloride powder with a particle size of 400 mesh into the source tank, heat it to 200°C, and pass it into the reaction chamber with high-temperature argon (300°C) as the carrier gas, and the flow rate of the carrier gas is 120ml / min , the temperature of the reaction chamber is 950°C, and the vacuum degree of the reaction chamber is 10Pa; while the tantalum pentachloride powder is passed into the reaction chamber with argon as the carrier gas, hydrogen is passed into the reaction chamber at a flow rate of 120ml / min, and the reduction reaction is carried out for 6 hours. The tant...

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Abstract

The invention discloses a porous medical tantalum implant material and a preparation method and application thereof. The porous medical tantalum implant material is prepared through the steps of reducing a tantalum metal compound into tantalum metal powder and uniformly depositing the tantalum metal powder on the surface of a graphite carbon skeleton to form a tantalum coating according to the chemical vapor deposition method, wherein the tantalum metal compound is one of tantalum pentachloride and tantalum fluoride; the porosity of the graphite carbon skeleton is greater than 70% and the aperture is 200-600 microns; the tantalum coating is 40-60 microns in thickness. The porous medical tantalum implant material is high in porosity and uniform in pore size, adopts an interconnected porous structure, has few dead pore spaces, is similar to a human cancellous bone, can promote bone ingrowth, and can be applied to repairing injured bones at multiple parts of a body and bone defects after osteonecrosis.

Description

technical field [0001] The invention relates to a preparation process of a medical porous metal material, in particular to a preparation method of a medical porous tantalum implant material that can be applied to orthopedic load-bearing parts. Background technique [0002] The repair of bone defects after bone trauma and necrosis has problems of poor mechanical and osteoinductive properties. After the importance of porous materials in vivo is revealed, this problem is expected to be better resolved. Studies have found that the porosity and pore size of porous materials are important factors in determining the success of implants, and increasing the porosity or reducing the "dead space" will facilitate bone ingrowth. It is generally believed that the porosity is greater than 60%, and the diameter of the void is greater than 150 μm, which is conducive to bone ingrowth. When the pore size is 200 μm-400 μm, it is most conducive to the growth of new bone. At the same time, the ...

Claims

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Application Information

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IPC IPC(8): A61L27/42A61L27/56C23C16/06C23C16/44
Inventor 赵德伟王本杰尉晓蔚谢辉黄诗博王威
Owner 赵德伟
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