Preparation technique of zirconium radical surface porous nano zirconium oxide biologically active coating

A technology of nano-zirconia and bioactivity, which is applied in the field of porous nano-zirconia bioactive coating material and its micro-arc oxidation preparation process, which can solve the problem of insufficient bioactivity of zirconia coating, inability to combine strength, porosity and nano-crystallization Taking into account other issues to achieve the effect of good plasticity, good biological activity and high bonding strength

Inactive Publication Date: 2007-09-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth pointing out that the hydroxyapatite coating prepared by the prior art cannot achieve a balance in terms of bonding strength, porosity and nanocrystallization, while the zirconia coating (film) also has a slightly insufficient biological activity. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Will 0.2M (CH 3 COO) 2 Ca·H 2 O with 0.02M β-C 3 h 7 Na 2 o 6 P·5H 2 O aqueous solution is mixed to make electrolyte solution.

[0012] With zirconium as the anode and metal stainless steel sheet as the cathode, a pulse power supply is used at a constant voltage of 350V and an initial current density of 7mA / mm 2 , The frequency is 1000Hz, the duty ratio is 20%, and the distance between the cathode and anode plates is 8cm, and the zirconium is subjected to micro-arc oxidation for 5 minutes, and a porous coating with a thickness of about 5 μm can be formed on the surface of the zirconium. The coating is composed of tetragonal zirconia and a small amount of monoclinic zirconia, and the grain size is about 10nm. It can induce the deposition of bone apatite in a simulated body fluid environment for 21 days, and has good biological activity.

Embodiment 2

[0014] Will 0.2M (CH 3 COO) 2 Ca·H 2 O with 0.06M β-C 3 h 7 Na 2 o 6 P·5H 2 O aqueous solution is mixed to make electrolyte solution.

[0015] With zirconium alloy as the anode and stainless steel sheet as the cathode, a pulse power supply is used at a constant voltage of 450V and an initial current density of 9mA / mm 2 , The frequency is 500Hz, the duty cycle is 40%, and the distance between the cathode and anode plates is 10cm, and the zirconium alloy is subjected to micro-arc oxidation for 5 minutes, and a porous coating with a thickness of about 15 μm can be formed on the surface of the zirconium alloy. The coating is entirely composed of tetragonal zirconia, and the grain size is about 25nm. It can induce the deposition of bone apatite in a simulated body fluid environment for 14 days, and has good biological activity.

Embodiment 3

[0017] Add 0.5M of (CH 3 COO) 2 Ca·H 2 O with 0.06M β-C 3 h 7 Na 2 o 6 P·5H 2 O aqueous solution is mixed to make electrolyte solution.

[0018] With zirconium alloy as the anode and stainless steel sheet as the cathode, a pulse power supply is used at a constant voltage of 600V and an initial current density of 12mA / mm 2 , The frequency is 1000Hz, the duty ratio is 60%, and the distance between the cathode and anode plates is 12cm, the zirconium alloy is subjected to micro-arc oxidation for 5 minutes, and a porous coating with a thickness of about 40 μm can be formed on the surface of the zirconium alloy. The coating is entirely composed of tetragonal zirconia, and the grain size is about 40nm. It can induce the deposition of bone apatite in a simulated body fluid environment for 5 days, and has good biological activity.

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Abstract

The invention discloses a process for preparing zirconium surface porous nanometer zirconia biological activity coat. The porous nanometer zirconia biological activity coat is directly produced by micro-arc oxidation treating zirconium and zirconium alloy under high pressure using impulsing power source, with water solution containing calcium and phosphorous as electrolytic solution. The produced nanometer zirconia biological activity coat comprises tetragonal zirconia with the thickness of more than 40 mum and porous nanometer crystal structure, without interface between based bodys, accordingly it has high bonding strength, good tenacity and elastic modulus adjacent to sclerotin, bone apatite formed by inducing in similar body fluid has good biological activity usable as biological activity surface layer of zirconium medical implant.

Description

technical field [0001] The invention relates to the composition and preparation technology of a novel bioactive coating on the surface of zirconium-based medical implants (such as zirconium and zirconium-titanium alloy dental implants and bone implants), in particular to a porous nano-zirconia bioactive coating material and its micro-arc oxidation preparation process. Background technique [0002] Zirconium and zirconium alloys have sufficient strength and toughness and excellent biocompatibility, and their elastic modulus is lower than that of conventional medical metal materials such as titanium alloys and cobalt-chromium-molybdenum alloys, which can reduce the difference in elastic modulus between the implant and cortical bone. Match-induced stress shielding and bone resorption. Zirconium and its alloys have been applied in the fields of pins, screws, and cranial plates in surgery and dentistry, and can also be used as bone and joint implants. Bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 憨勇闫元媛吕春国
Owner XI AN JIAOTONG UNIV
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