Electrochemical method for preparing fluorine-containing hydroxyapatite/zirconia transition coating on surface of medical titanium

A fluorine-containing hydroxyapatite, electrochemical technology, applied in medical science, pharmaceutical formulations, dental preparations, etc., can solve the problems of shortening the service life of materials, shedding, and low bonding strength, and achieve increased strength and high utilization of raw materials , The effect of uniform and dense coating

Inactive Publication Date: 2013-07-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the disadvantages such as low bonding strength between the FHA coating and the Ti substrate lead to potential problems such as peeling off of the coating under the action of force, thereby shortening the service life of the material

Method used

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  • Electrochemical method for preparing fluorine-containing hydroxyapatite/zirconia transition coating on surface of medical titanium
  • Electrochemical method for preparing fluorine-containing hydroxyapatite/zirconia transition coating on surface of medical titanium
  • Electrochemical method for preparing fluorine-containing hydroxyapatite/zirconia transition coating on surface of medical titanium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Wire-cut medical pure titanium into 10×10×1mm titanium sheets; grind the titanium sheets with sandpaper until the surface is smooth without machining traces; respectively use absolute ethanol, acetone, and deionized water with ultrasonic waves Cleaning time is 10min; then use HF:HNO 3 :H 2 O=1:1:10 acid solution for acid etching for 20s. Finally, put the sample into the sample bag and wait for the test.

[0025] (2) The Ti sheet was used as the cathode working electrode, the platinum electrode was used as the counter electrode, and the saturated calomel electrode was used as the reference electrode, and the distance between the electrodes was 2 cm.

[0026] (3) Weigh 0.5781 g of anhydrous zirconium oxynitrate, dissolve it with 100 ml of hot dilute nitric acid, set the volume to 200 ml after cooling, adjust the pH of the solution to 2.2 with ammonia water, and finally obtain a uniform electrolyte. Put the electrolyte solution into a 250ml glass beaker for electroc...

Embodiment 2

[0032] (1) Wire-cut medical pure titanium into 10×10×1mm titanium sheets; grind the titanium sheets with sandpaper until the surface is smooth without machining traces; respectively use absolute ethanol, acetone, and deionized water with ultrasonic waves Cleaning time is 10min; then use HF:HNO 3 :H 2 O=1:1:10 acid solution for acid etching for 20s. Finally, put the sample into the sample bag and wait for the test.

[0033] (2) The Ti sheet was used as the cathode working electrode, the platinum electrode was used as the counter electrode, and the saturated calomel electrode was used as the reference electrode, and the distance between the electrodes was 2 cm.

[0034] (3) Weigh 0.5781 g of anhydrous zirconium oxynitrate, dissolve it with 100 ml of hot dilute nitric acid, set the volume to 200 ml after cooling, adjust the pH of the solution to 2.2 with ammonia water, and finally obtain a uniform electrolyte. Put the electrolyte solution into a 250ml glass beaker for electroc...

Embodiment 3

[0038] (1) Wire-cut medical pure titanium into 10×10×1mm titanium sheets; grind the titanium sheets with sandpaper until the surface is smooth without machining traces; respectively use absolute ethanol, acetone, and deionized water with ultrasonic waves Cleaning time is 10min; then use HF:HNO 3 :H 2 O=1:1:10 acid solution for acid etching for 20s. Finally, put the sample into the sample bag and wait for the test.

[0039] (2) The Ti sheet was used as the cathode working electrode, the platinum electrode was used as the counter electrode, and the saturated calomel electrode was used as the reference electrode, and the distance between the electrodes was 2 cm.

[0040] (3) Weigh 0.5781 g of anhydrous zirconium oxynitrate, dissolve it with 100 ml of hot dilute nitric acid, set the volume to 200 ml after cooling, adjust the pH of the solution to 2.2 with ammonia water, and finally obtain a uniform electrolyte. Put the electrolyte solution into a 250ml glass beaker for electroc...

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Abstract

The invention discloses an electrochemical method for preparing a fluorine-containing hydroxyapatite/zirconia transition coating on the surface of medical titanium. The method comprises the steps that: electro-deposition is carried in an electrolytic tank with a three-electrode system, wherein a medical titanium chip is adopted as a working electrode; a Zr(OH)4 plating is deposited in a zirconyl nitrate solution with a certain concentration and a certain pH value, wherein the deposition current is 11.1mA and the deposition time is 40s; a fluorine-containing hydroxyapatite (FHA) plating is deposited in an electrolyte which has a certain concentration and a certain pH value and which is composed of calcium nitrate, ammonium dihydrogen phosphate, and sodium fluoride, wherein the deposition current is 0.8mA and the deposition time is 3600s; and vacuum sintering is carried out under a temperature of 450 DEG C, such that the FHA/ZrO2 transition coating is obtained. According to the invention, fluorine partially substitutes hydroxyl group in apatite, fluorine ions are smaller than hydroxyl groups, and FHA lattice constant is small, such that FHA solubility is lower than HA. A coating morphology is changed from a micron-level chrysanthemum petal shape into a nano-level cone shape. With an antibacterial effect of F ions, dental caries can also be prevented. ZrO2 serves as a transition layer between the titanium substrate and the FHA coating, and the bonding strength between the FHA/ZrO2 transition coating and the Ti substrate is greatly improved. The bonding strength between the FHA/ZrO2 transition coating and the titanium substrate is high, a physiological solubility resistance is high, and antibacterial performance is good. The provided product has certain potential to be developed into an oral medical material with good development prospect.

Description

technical field [0001] The invention relates to a method for preparing a fluorine-containing hydroxyapatite / zirconia transition coating on the surface of a dental metal material by constant current electrodeposition, and is especially suitable for the bioactive coating on the surface of a dental implant biometal material preparation. Background technique [0002] Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 , HA) is the basic inorganic component of human hard tissue, has good biocompatibility and biological activity, the dissolution of HA coating stimulates the growth of bone, but its easy degradation phenomenon is not conducive to the combination of implant and bone tissue . Fluorinated hydroxyapatite (Ca 10 (PO 4 ) 6 f x (OH) 2-x , 1<x<2, FHA) is one of the isomers of apatite, which is different from hydroxyapatite (HA) in that the fluorine part replaces the hydroxyl group in the direction parallel to the c-axis Location. Some fluoride ions (F - ) instead of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/04A61K6/033A61K6/04A61K6/838
Inventor 庞小峰黄勇严雅静
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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