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Biomedical metal porous coating capable of replacing bone cement and preparation method of biomedical metal porous coating

A metal porous, biomedical technology, applied in coatings, medical science, prostheses, etc., can solve the problems of difficult to achieve controllable adjustment of pore size, low bonding strength without bone cement, poor bone growth, etc., to achieve beneficial Effective binding, avoiding stress shielding effect, good binding effect

Active Publication Date: 2022-01-21
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bone cementless technology includes sintering, plasma spraying, direct energy deposition, etc., but direct energy deposition is difficult to achieve controllable adjustment of pore size
[0004] Although bone cement has been clinically used for many years, it is difficult to overcome the shortcomings of refractory degradation, easy loosening, low strength, short service life, difficult replacement, and strong reaction; while the bone cement-free technology that simply increases the surface roughness of the implant has low bonding strength, Poor bone ingrowth

Method used

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  • Biomedical metal porous coating capable of replacing bone cement and preparation method of biomedical metal porous coating
  • Biomedical metal porous coating capable of replacing bone cement and preparation method of biomedical metal porous coating
  • Biomedical metal porous coating capable of replacing bone cement and preparation method of biomedical metal porous coating

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Embodiment 1

[0028] A method for preparing a biomedical metal porous coating that can replace bone cement of the present invention, comprising the following steps:

[0029] (1) Select CoCrMo metal powder (its specific composition is Co: 66.8wt.%; Cr: 28.61wt.%; Mo: 4.56wt.%; particle size range is 150~300 μm, oxygen content is below 4000ppm) as raw material, The screened metal powder is laid on the surface of the metal block of the cobalt-based implant (the mass ratio of the cobalt-based implant is: Co-27Cr-6Mo).

[0030](2) Place the cobalt-based implant with CoCrMo powder laid in step (1) in a graphite mold, and conduct spark plasma vacuum sintering at a heating rate of 80 °C / min, a sintering temperature of 800 °C, and a holding time of 10 min , the vacuum degree is 10Pa, the pressure is 20MPa, and the pressure is maintained throughout the process to obtain a biomedical metal porous coating.

[0031] (3) Through tissue observation and mechanical performance testing of the product of thi...

Embodiment 2

[0033] A method for preparing a biomedical metal porous coating that can replace bone cement of the present invention, comprising the following steps:

[0034] (1) Select CoCrMo metal powder (its specific composition is Co: 66.8wt.%; Cr: 28.61wt.%; Mo: 4.56wt.%; particle size range is 100~200 μm, oxygen content is below 4000ppm) as raw material, The screened metal powder is laid on the surface of the metal block of the cobalt-based implant (the composition of the cobalt-based implant is: Co-27Cr-6Mo).

[0035] (2) Place the cobalt-based implant with CoCrMo powder laid in step (1) in a graphite mold, and perform spark plasma sintering at a heating rate of 100 °C / min, a sintering temperature of 850 °C, and a holding time of 15 min. The vacuum degree is 10Pa, the pressure is 20MPa, and the pressure is maintained throughout the process to obtain a biomedical metal porous coating.

[0036] (3) Through tissue observation and mechanical performance testing of the product of this exa...

Embodiment 3

[0038] A method for preparing a biomedical metal porous coating that can replace bone cement of the present invention, comprising the following steps:

[0039] (1) Select CoCrMo metal powder (its specific composition is Co: 66.8wt.%; Cr: 28.61wt.%; Mo: 4.56wt.%; particle size range is 100~200 μm, oxygen content is below 4000ppm) as raw material, The screened metal powder is laid on the surface of the metal block of the cobalt-based implant (the composition of the cobalt-based implant is: Co-27Cr-6Mo).

[0040] (2) Place the cobalt-based implant with CoCrMo powder laid in step (1) in a graphite mold for spark plasma sintering at a heating rate of 60°C / min, a sintering temperature of 780°C, and a holding time of 5 minutes. The vacuum degree is 10Pa, the pressure is 15MPa, and the pressure is maintained throughout the process to obtain a biomedical metal porous coating.

[0041] Through tissue observation and mechanical performance testing of the product in this example, the pre...

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Abstract

The invention discloses a biomedical metal porous coating capable of replacing bone cement and a preparation method of the biomedical metal porous coating. Metal powder is laid on the surface of a metal-based implant, and the metal porous coating is formed on the surface of the metal-based implant through spark plasma vacuum sintering. The metal porous coating meets specific pore characteristics and performance indexes required by bone tissue ingrowth, is well combined with the metal-based implant, and can be used instead of the bone cement, so that bone tissue can enter the metal porous coating along with bone growth, effective combination with the metal-based implant is facilitated, and a series of negative influences caused by using the existing bone cement are avoided. The preparation temperature of the metal porous coating is relatively low, a pore forming agent is not used, the preparation period is short, and operation is easy.

Description

technical field [0001] The invention relates to a biomedical metal porous coating and a preparation method thereof, in particular to a biomedical metal porous coating that can replace bone cement, the pores reach the characteristic index, and is well combined with the substrate, and also relates to the discharge plasma vacuum sintering technology The invention discloses a method for preparing a metal porous coating, which belongs to the field of biomedical metal materials. Background technique [0002] At present, bone cement is mostly used in medicine to couple between joint implants and bone tissue. my country's calcium sulfate bone cement material products were approved for marketing in 2000 and have been used clinically for more than 20 years. Inorganic bone cement materials have been widely used in bone grafting in orthopedics, oral and maxillofacial surgery, neurosurgery and other fields. However, bone cement implantation in some patients will cause a series of clini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04C22C19/07A61L27/30B22F3/105B22F5/00
CPCB22F7/04B22F3/105B22F5/00C22C19/07A61L27/306B22F2003/1051B22F2201/20
Inventor 张卫东肖芸莹陈福林武俊杰符永旭徐静茹吴正刚
Owner HUNAN UNIV
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