High-strength dental composite resin and preparation method thereof

A composite resin and dental technology, used in dental preparations, dentistry, dental prostheses, etc., can solve the problems of low content of mesoporous fillers, time-consuming and laborious, and unfavorable industrial production, and achieve the effect of increasing the total content and improving mechanical properties.

Active Publication Date: 2019-05-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above studies show that: (1) the content of mesoporous fillers in co-fillers is low, which is not conducive to showing the advantages of mesoporous fillers to the greatest extent; (2) the secondary

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  • High-strength dental composite resin and preparation method thereof
  • High-strength dental composite resin and preparation method thereof
  • High-strength dental composite resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Composition of inorganic fillers

[0026] According to the close-packing model of equal-sized spheres, the formulas for calculating the maximum diameters of spherical particles that can fill the octahedral voids and tetrahedral voids of equal-sized spheres (primary particles) are d 8 = 0.828R and d 4 =0.45R (R is the radius of the equal sphere). Spherical mesoporous silica with a particle diameter of 550nm was selected as the primary particle, and spherical silica with a particle diameter of 227nm and 123nm were respectively selected as the secondary particle according to the calculation results.

[0027] (2) Preparation of composite resin

[0028] According to the formula shown in Table 1, the spherical mesoporous silica with a particle size of 550nm, the organic monomer and the photoinitiator are mixed first by manual premixing. When the filler is fully wetted by the resin matrix, put it into three rollers. Grinder (EXAKT80E, Germany) for secondary mixing. Sec...

Embodiment 2

[0034] (1) Composition of inorganic fillers

[0035] Spherical mesoporous zinc oxide with a particle size of 900nm was selected as the primary particle, and spherical titanium dioxide with a particle size of 372nm and 202nm was selected as the secondary particle according to the formula shown in Example 1.

[0036] (2) Preparation of composite resin

[0037] According to the formula shown in Table 2, firstly, the spherical mesoporous zinc oxide with a particle size of 900nm, organic monomer and photoinitiator were mixed by manual premixing. When the filler was fully wetted by the resin matrix, it was put into three-roll grinding Machine (EXAKT 80E, Germany) secondary mixing. Secondly, after adding spherical titanium dioxide with a particle diameter of 372nm to the maximum addition amount, then adding spherical titanium dioxide with a particle diameter of 202nm to the maximum addition amount. After vacuum negative pressure treatment, an uncured composite resin paste is obtain...

Embodiment 3

[0043] (1) Composition of inorganic fillers

[0044] Spherical mesoporous silica with a particle size of 1.2 μm was selected as the primary particle, and spherical hydroxyapatite with a particle size of 496 nm and 270 nm were respectively selected as the secondary particle according to the formula shown in Example 1.

[0045] (2) Preparation of composite resin

[0046] According to the formula shown in Table 3, the spherical mesoporous silica with a particle size of 1.2 μm, the organic monomer and the photoinitiator were mixed first by manual premixing. When the filler was fully wetted by the resin matrix, three Roll mill (EXAKT80E, Germany) secondary mixing. Secondly, after adding spherical hydroxyapatite with a particle diameter of 496nm to the maximum addition amount, then adding spherical hydroxyapatite with a particle diameter of 270nm to the maximum addition amount. After vacuum negative pressure treatment, an uncured composite resin paste is obtained. Subsequent curi...

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Abstract

The invention relates to a high-strength dental composite resin and a preparation method thereof. Raw materials of the composite resin comprises inorganic filler, organic monomers and a photoinitiator, and the inorganic filler is co-filler composed of spherical mesoporous filler and spherical filler. The preparation method comprises the steps that the spherical mesoporous filler, the organic monomers and the photoinitiator are pre-mixed and put into a three-roller grinder to be further mixed, the spherical filler is added, and a composite resin plaster which is not cured is obtained after vacuum negative pressure treatment is conducted; the dental composite resin is finally obtained after visible light curing. The dental composite resin has the advantages that the preparation method is simple and convenient, the mechanical performance is excellent, and the resin has better application prospects.

Description

technical field [0001] The invention belongs to the field of dental restoration materials, in particular to a high-strength dental composite resin and a preparation method thereof. Background technique [0002] Since R.L.Bowen synthesized the famous bisphenol A-glycidyl methacrylate (Bis-GMA) in 1962, the resin-based dental composite resin has become one of the most carious diseases due to its beautiful color, convenient operation, excellent physical, chemical and biological properties. It is an important material for the treatment of tooth defects. This type of resin is mainly composed of organic monomers, silanized inorganic fillers and photoinitiators. The organic monomers distributed in the continuous phase can wrap the inorganic fillers to form a polymer network structure in the free radical polymerization reaction. Although researchers have made a lot of progress in optimizing the structure of organic monomers and the composition of inorganic fillers, repairing fractu...

Claims

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Application Information

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IPC IPC(8): A61K6/00A61K6/083C08F220/32C08F222/20C08F220/26C08F2/44
Inventor 王瑞莉朱美芳陈红艳刘红梅苗晓莉
Owner DONGHUA UNIV
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