Preparation method of porous biomedical metal, ceramic or metal/ceramic composite material

A ceramic composite material, biomedical technology, applied in the field of ceramics or metal/ceramic composite materials, porous biomedical metal, can solve the problems of insufficient surface roughness, high process cost, difficult bone tissue integration, etc., to achieve uniform distribution of porosity , simple process and easy mass production

Inactive Publication Date: 2014-02-26
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The limitation of this method is that the prepared porous material has a straight-through pore structure, the surface roughness of the pores is not enough, it is difficult to form a good combination with bone tissue, and the process cost is high

Method used

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  • Preparation method of porous biomedical metal, ceramic or metal/ceramic composite material
  • Preparation method of porous biomedical metal, ceramic or metal/ceramic composite material
  • Preparation method of porous biomedical metal, ceramic or metal/ceramic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1: Preparation of porous titanium

[0049] Take 20g of titanium powder with a particle size distribution between 45 and 56mm as primary particles; put a certain amount of the above-mentioned primary particles in the centrifugal turntable as master batches, adjust the rotational speed of the centrifugal turntable to make these master particles form a moving particle flow , while spraying atomized 5% polyvinyl alcohol aqueous solution to its surface, and replenishing new primary particles in time, so that the masterbatch will continue to grow to obtain the required secondary nearly spherical particles, in a vacuum sintering furnace at 1000 ° C Pre-sintering for 1 hour; sieve these secondary nearly spherical particles with a sample sieve, take a certain amount of secondary nearly spherical particles with a particle size distribution between 850 and 1000 mm, soak the surface with 5% polyvinyl alcohol aqueous solution and dry at room temperature After drying, it...

Embodiment 2

[0051] Example 2: Preparation of porous hydroxyapatite ceramics

[0052] Take 20g of hydroxyapatite micropowder with a particle size distribution between 25 and 38mm as primary particles; put a certain amount of the above-mentioned primary particles in the centrifugal turntable as masterbatch, adjust the rotational speed of the centrifugal turntable to make these masterbatches move At the same time, the mixed aqueous solution of 30% water-soluble starch and 5% polyvinyl alcohol is sprayed on its surface, and new primary particles are added in time to make the masterbatch grow continuously to obtain the required secondary near Spherical particles, and pre-sintered in a muffle furnace at 800 ° C for 1 h; these secondary nearly spherical particles were screened with a sample sieve, and a certain amount of secondary nearly spherical particles with a particle size distribution between 600 and 710 mm were taken. Infiltrated with 10% polyvinyl alcohol aqueous solution and dried at ...

Embodiment 3

[0054] Example 3: Preparation of porous iron / β-tricalcium phosphate composite scaffold

[0055] Take 10g of pure iron powder with a particle size distribution between 38~45mm and 10g of tricalcium phosphate micropowder with a particle size distribution between 38~45mm, mix them well and use them as primary particles; put a certain amount of The above-mentioned primary particles are used as master batches. Adjust the rotational speed of the centrifugal turntable so that these master batches form a moving particle flow. At the same time, spray an atomized mixed aqueous solution of 5% polyethylene glycol and 3% methylcellulose on the surface, and replenish The new primary particles, make the master batch grow continuously to obtain the required secondary nearly spherical particles, and pre-sinter in a vacuum sintering furnace at 800 ° C for 1 hour; these secondary nearly spherical particles are screened with a sample sieve, Take a certain amount of secondary nearly spherical pa...

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Abstract

The invention discloses a method of preparing a porous biomedical metal, ceramic or metal/ceramic composite material. The method comprises the following steps of based on a secondary pelletizing technology that metal micro powder or/and ceramic micro powder with narrow particle size distribution are used as primary particles, by using the primary particles as materials, adding a binder, carrying out secondary pelletizing by a centrifugal pelletizing method to obtain secondary nearly-spherical particles; forming the screened secondary nearly-spherical particles with the narrow particle size distribution in a mould cavity of a mould with special shape and dimension in a close packing mode, and sintering at a high temperature to obtain a medical material or product with a special porous structure and constitution. Compared with the preparation method of the porous biological material in the prior art, the preparation method disclosed by the invention has the advantages of simple process, good repeatability and the like, easily realizes bath production, is capable of preparing the porous biological material with a gradient porous structure and high mechanical strength at the same time, and is especially suitable for a bone grafting material for repairing bearing part bone defect.

Description

technical field [0001] The invention relates to a method for porous biomedical metal, ceramics or metal / ceramic composite materials, and belongs to the field of biomedical materials and medical implants. technical background [0002] Bone defect is a common clinical case, and the repair of large bone defect usually requires filling with suitable bone graft materials. Although autologous bone transplantation is still the "gold standard" for clinical treatment, the source is limited after all. With the rapid development of biomedical materials science and engineering, many synthetic materials with excellent biocompatibility and osteoconductivity have been obtained. Sufficient attention has been paid to it, and it has been widely used in clinical practice. Bioceramics, mainly composed of calcium phosphate materials, is the most clinically used bone repair material because of its inorganic composition similar to human bone tissue, but its poor mechanical properties, such as low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08B22F3/11C04B38/06A61L27/04A61L27/06A61L27/10A61L27/56
Inventor 朱向东陈宏杰樊渝江张兴栋
Owner SICHUAN UNIV
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