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Method for preparing nano-silver-based dual-curing dental antibacterial adhesive

A dual-curing, adhesive technology, used in dental preparations, antibacterial drugs, medical preparations containing active ingredients, etc. It can reduce the problems such as decline, and achieve the effect of stable and lasting antibacterial performance, stable binder system and good dispersibility.

Inactive Publication Date: 2015-04-29
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that silver nanoparticles are often agglomerated, and the smaller the particles, the more severe the agglomeration, so it is difficult to fully disperse in the resin
This will lead to inhomogeneous binder structure, and microcracks may be formed at the agglomeration of silver particles after curing due to stress concentration, which will eventually lead to a decrease in bond strength

Method used

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  • Method for preparing nano-silver-based dual-curing dental antibacterial adhesive
  • Method for preparing nano-silver-based dual-curing dental antibacterial adhesive
  • Method for preparing nano-silver-based dual-curing dental antibacterial adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] a. In 100 parts by volume of absolute ethanol, add 100 parts of deionized water and 12 parts of 28% concentrated ammonia water, stir evenly at 25°C, and then add 20 parts of tetraethyl silicate dropwise (TEOS), heated and stirred for 18 hours;

[0052] b. Centrifuged, washed and dried at room temperature to obtain monodisperse spherical SiO 2 particles;

[0053] c. SiO obtained by b. 2 Dispersed in deionized water by ultrasonic method, SiO 2 The mass ratio with water is 2:100, and every 1 part of SiO 2 The aqueous solution was mixed with 2 parts of silver ammonia solutions with a concentration of 0.3mol / L, and stirred at room temperature for 3 hours;

[0054] d. After centrifuging and washing the mixture obtained in c three times, disperse it in 7 parts of deionized water;

[0055] e. Add 3 parts of a reducing agent solution with a concentration of 0.3 mol / L to the dispersion obtained in d, stir for 1 hour at a temperature of 25° C., and obtain silver-loaded silico...

Embodiment 2

[0061] a. In 100 parts by volume of absolute ethanol, add 2 parts of deionized water and 12 parts of 28% concentrated ammonia water, stir evenly at 25°C, and then add 20 parts of tetraethyl silicate dropwise (TEOS), heating and stirring for 18 hours; a. in 100 parts by volume of absolute ethanol, add 100 parts of deionized water and 12 parts of 28% strong ammonia water, stir evenly at a temperature of 25 ° C, and then Add 20 parts of tetraethyl silicate (TEOS) dropwise, heat and stir for 18 hours;

[0062] b. Centrifuged, washed and dried at room temperature to obtain monodisperse spherical SiO 2 particles;

[0063] c. SiO obtained by b. 2 Dispersed in deionized water by ultrasonic method, SiO 2 The mass ratio with water is 2:100, and every 1 part of SiO 2 The aqueous solution was mixed with 2 parts of silver ammonia solutions with a concentration of 0.3mol / L, and stirred at room temperature for 3 hours;

[0064] d. After centrifuging and washing the mixture obtained in c...

Embodiment 3

[0071] a. In 100 parts by volume of absolute ethanol, add 100 parts of deionized water and 12 parts of 28% concentrated ammonia water, stir evenly at 25°C, and then add 20 parts of tetraethyl silicate dropwise (TEOS), heated and stirred for 18 hours;

[0072] b. Centrifuged, washed and dried at room temperature to obtain monodisperse spherical SiO 2 particles;

[0073] c. SiO obtained by b. 2 Dispersed in deionized water by ultrasonic method, SiO 2 The mass ratio with water is 2:100, and every 1 part of SiO 2 The aqueous solution was mixed with 2 parts of silver ammonia solutions with a concentration of 0.3mol / L, and stirred at room temperature for 3 hours;

[0074] d. After centrifuging and washing the mixture obtained in c three times, disperse it in 7 parts of deionized water;

[0075] e. Add 3 parts of a reducing agent solution with a concentration of 0.3 mol / L to the dispersion obtained in d, stir at 80° C. for 1 hour, and centrifuge and wash to obtain silver-loaded ...

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Abstract

The invention provides a method for preparing a nano-silver-based dual-curing dental antibacterial adhesive. The method comprises the following specific steps: (1) preparing monodisperse spherical nano SiO2 particles by using a Stober method; (2) generating nano silver particles with small particle sizes on the surfaces of the nano SiO2 particles by utilizing a reduction reaction of an ammonia silver nitrate solution, namely preparing a nanoscale silver-loaded inorganic antibacterial agent; (3) performing proper surface modification on the previous silver-loaded inorganic antibacterial agent; and (4) preparing the optical and thermal dual-curing dental adhesive, and adding the inorganic antibacterial agent. The dental adhesive prepared by the invention has the multiple advantages of simple and feasible preparation process, product system stability, high operability, excellent antibacterial performance, durability and the like and has high clinical application potential.

Description

technical field [0001] The invention relates to the application field of nanomaterials, in particular to a method for preparing a dual-curing dental antibacterial adhesive based on nanometer silver-loaded inorganic antibacterial agents. Background technique [0002] With the increasing demand for modern dental restoration and cosmetics, the application of dental bonding technology is becoming more and more extensive. Dental bonding technology includes enamel bonding and dentin bonding. Since the invention of acid etching technology in the 1950s, enamel bonding technology has been very mature. There are many difficulties, but they have been greatly improved and improved. By the early 1990s, the invention of the self-etching bonding system made the dental bonding technology more convenient, fast and effective, and opened a new chapter for the progress of the dental bonding technology. Today, dental bonding technology has paid more attention to endowing the bonding system wit...

Claims

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Application Information

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IPC IPC(8): A61K6/06A61K33/38A61P31/04
Inventor 何丹农张彬周涓朱君杨迪诚金彩虹
Owner SHANGHAI JIAO TONG UNIV
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