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Method for surface modification of dental implant

A surface modification, dental implant technology, applied in the direction of dental prosthesis, dentistry, dental preparations, etc., can solve the problem that the growth of surrounding bone tissue cannot effectively promote wound healing, the bonding strength of surrounding tissue is low, and the brittleness of hydroxyapatite Large and other problems, to achieve the effect of alleviating the mismatch of thermal expansion coefficients, enhancing the bonding strength, and uniform pore size

Inactive Publication Date: 2013-10-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because titanium itself does not have biological activity, it cannot effectively promote wound healing and the growth of surrounding bone tissue. Secondly, it cannot effectively form bone bonds with surrounding tissues, and its bonding strength with surrounding tissues is low, which is not conducive to its long-term use.
Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 , HA) is the main component of human bone, more than 95% in the enamel of human teeth, hydroxyapatite has good biocompatibility and osteogenic inductivity, and is often used in bone tissue filling materials, but because hydroxyapatite Stone is brittle and low in strength, which limits its physical application

Method used

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  • Method for surface modification of dental implant
  • Method for surface modification of dental implant
  • Method for surface modification of dental implant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) The threaded titanium dental implants on the mechanical surface were cleaned with absolute ethanol, acetone, deionized water and ultrasonic wave for 10 minutes; then cleaned with HF:HNO 3 :H 2 O=1:3:6 acid solution for acid etching; finally use deionized water and ultrasonic cleaning for 10 minutes. Take out with tweezers and blow dry, set aside.

[0023] (2) Prepare 5w% hydrofluoric acid solution at room temperature as the electrolyte for anodic oxidation, use titanium implants as working electrodes, and 4 platinum electrodes as counter electrodes evenly distributed around the titanium dental implants with a working distance of 4 cm. Under magnetic stirring (80r / min), adopt 20V voltage, anodize by constant potential method for 1h, take out deionized water and ultrasonically clean, dry and set aside.

[0024] (3) Weigh 4.9592 g of calcium nitrate tetrahydrate and 1.4379 g of ammonium dihydrogen phosphate, and dissolve them in distilled water respectively. The abo...

Embodiment 2

[0029] The number of platinum electrodes in Example 1 can be more than two or ring electrodes as counter electrodes.

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Abstract

The invention mainly discloses a method for surface modification of a metal titanium dental implant. A titanium dioxide / hydroxyapatite composite coating with biocompatibility and biological activity is prepared on the surface of the dental implant by using a multi-electrode method; and the technology is suitable for modifying most of medical metal surfaces. The method mainly comprises the following steps of: (1) ultrasonically cleaning a mechanical face threaded titanium dental implant through ultrapure water, acetone and absolute ethyl alcohol and then drying; (2) uniformly arranging and distributing a titanium dioxide nanotube array with consistent aperture size on an anodic oxide layer of the implant as a buffer layer by using the multi-electrode method; (3) electrodepositing the hydroxyapatite coating in a calcium phosphate electric deposition solution by using the multi-electrode method to prepare the prepared hydroxyapatite coating which is uniformly distributed and has high purity and better biological activity; and (4) processing the material obtained by the process through high-temperature vacuum sintering. The titanium dioxide / hydroxyapatite composite coating prepared by the steps has better bonding strength and superior biological activity, so that the dental implant subjected to surface modification has a broader and longer-range application prospect.

Description

technical field [0001] The invention relates to a method for modifying the surface of a titanium metal dental implant. A titanium dioxide / hydroxyapatite composite coating with biocompatibility and bioactivity is prepared on the surface by a multi-electrode method. This technology is suitable for Modification of most medical metal surfaces. Background technique [0002] Titanium and its alloys have good biocompatibility and are one of the most important medical metal materials. They are mainly used in orthopedic surgery and dental restoration materials, such as artificial knee joints, bone joints and denture metal nails. However, because titanium itself does not have biological activity, it cannot effectively promote the healing of wounds and the growth of surrounding bone tissue. Secondly, it cannot effectively form bone bonds with surrounding tissues, and the bonding strength with surrounding tissues is low, which is not conducive to its long-term use. . Hydroxyapatite (C...

Claims

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Application Information

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IPC IPC(8): C25D11/26A61K6/033A61K6/04A61K6/838
Inventor 庞小峰严雅静黄勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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