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Boneoid apatite bio-active gradient coated artificial joint material and preparing process thereof

A bone-like apatite, gradient coating technology, applied in the field of medical bioactive composite materials, to achieve the effect of improving the bonding strength of the coating, firm biological bonding, good mechanical properties and biological properties

Inactive Publication Date: 2003-10-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the current artificial joint materials, to provide an artificial joint material with a bioactive gradient coating of bone-like apatite deposited on the surface of a metal substrate with excellent biocompatibility and a preparation method thereof, so that Various bioactive artificial joint implants form a strong biocombination with bone tissue in a short period of time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A batch of dog hip joints were processed from stainless steel with excellent biocompatibility as the base material, and a bioactive gradient coating was prepared on the surface of the metal base using Praxair4550 plasma spraying equipment, and then bone-like phosphor was prepared bionically on the surface of the gradient coating stone layer. Its preparation process is as follows:

[0034] Step 1: Preparation of Bioactive Gradient Coating

[0035] The hydroxyapatite, bioactive glass, and titanium oxide powders with a particle size of 30-80nm are subjected to conventional surface activation treatment to meet the requirements of the plasma spraying process. The plasma spraying technology with automatic net energy control is used to precisely control the delivery volume of various nanopowders, and a coating with a continuous gradient change in composition from biological stability to biological activity is prepared, that is, the metal prosthesis is used as the substrate, a...

Embodiment 2

[0048] A batch of dog hip joints were processed from a cobalt-chromium-molybdenum alloy with excellent biocompatibility as the base material, and a bioactive gradient coating was prepared on the surface of the metal base using Praxair4550 plasma spraying equipment, and then a biomimetic preparation of a bioactive gradient coating was made on the surface of the gradient coating. Bone apatite layer. Its preparation process is as follows:

[0049] Step 1: Preparation of Bioactive Gradient Coating

[0050]The hydroxyapatite, bioactive glass, and titanium oxide powders with a particle size of 30-80nm are subjected to conventional surface activation treatment to meet the requirements of the plasma spraying process. The plasma spraying technology with automatic net energy control is adopted to precisely control the delivery volume of various nano-powders, and to prepare coatings with continuous gradient changes in composition from biological stability to biological activity. That i...

Embodiment 3

[0063] A batch of dog hip joints were processed from Ti6Al7Nb with excellent biocompatibility as the base material, and a bioactive gradient coating was prepared on the surface of the metal base using Praxair4550 plasma spraying equipment. Then a bone-like apatite layer was biomimetically prepared on the surface of the gradient coating. Its preparation process is as follows:

[0064] Step 1: Preparation of Bioactive Gradient Coating

[0065] The hydroxyapatite, bioactive glass, and titanium oxide powders with a particle size of 30-80nm are subjected to conventional surface activation treatment to meet the requirements of the plasma spraying process. The plasma spraying technology with automatic net energy control is adopted to precisely control the delivery volume of various nano-powders, and to prepare coatings with continuous gradient changes in composition from biological stability to biological activity. That is, with the metal prosthesis as the substrate, the compositio...

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Abstract

An artificial joint material with the bioactive gradient coated layer of bone-like apatite is prepared through spraying the continuously gradient bioactive layer on the surface of the basic metallic body with excellent biologic compatibility. Said coated layer contains hydroxy apatite, bioactive glass, titanium oxide, Ca, P, Na, K and Mg. Its advantages are high bioactivity, tissue cell affinity and mechanical performance.

Description

technical field [0001] The invention relates to a medical bioactive composite material, in particular to a bone-like apatite bioactive gradient coating artificial joint material and a preparation method thereof. Background technique [0002] Artificial joint implants are of great significance to restore patients' limb functions and improve their quality of life, and are one of the most demanded implant materials in orthopedics at home and abroad. Most clinically used artificial joints are made of biologically inert metal materials. This type of artificial joint has good mechanical properties, but it cannot form a biological combination with human bone tissue. After several years of implantation, it tends to loosen and sink, making it difficult for the joint implant to meet the clinical requirements in terms of initial retention and long-term efficacy. application requirements. Hydroxyapatite has good bioactivity and biocompatibility, and can form a chemical bond with bone ...

Claims

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Application Information

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IPC IPC(8): A61L27/12
Inventor 王迎军宁成云陈晓峰罗承萍郑裕东赵娜如
Owner SOUTH CHINA UNIV OF TECH
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