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Preparation method of a dual-cure dental antibacterial adhesive based on nano-silver

A dual curing and adhesive technology, which is applied in the direction of dental preparations, antibacterial drugs, medical preparations containing active ingredients, etc., can solve the problem that the resin is difficult to be fully dispersed, the adhesive structure is uneven, and the bonding strength Decrease and other problems, to achieve the effect of stable and durable antibacterial performance, stable binder system and good dispersibility

Inactive Publication Date: 2017-12-15
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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  • Preparation method of a dual-cure dental antibacterial adhesive based on nano-silver
  • Preparation method of a dual-cure dental antibacterial adhesive based on nano-silver
  • Preparation method of a dual-cure dental antibacterial adhesive based on nano-silver

Examples

Experimental program
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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), heated and stirred 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 three times, disperse it in 7 parts of deionized water;

[0065] 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 silicon ...

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 for 1 hour at a temperature of 50° C., and obtain silver-loaded silico...

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Abstract

The present invention provides a kind of preparation method of double solidification dental antibacterial adhesive based on nanometer silver, its concrete steps: (1) Stober method prepares monodisperse spherical nanometer SiO2 particle; (2) utilizes the reduction of ammoniacal silver nitrate solution reaction, on the surface of nano-SiO2 spheres to generate nano-silver particles with a smaller particle size, that is, to prepare nano-scale silver-loaded inorganic antibacterial agents; (3) properly modify the surface of the above-mentioned silver-loaded inorganic antibacterial agents; (4) prepare light and heat A dual-cure dental adhesive with the addition of the above-mentioned inorganic antimicrobial agent. The dental adhesive prepared by the invention has multiple advantages such as simple and easy preparation process, stable product system, strong operability, excellent and long-lasting antibacterial performance, and has the potential of clinical application.

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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Patent Type & Authority Patents(China)
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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