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A kind of ultra-low shrinkage composite resin and preparation method thereof

A composite resin and ultra-low shrinkage technology, which can be used in pharmaceutical formulations, dental preparations, compression molding cups, etc., can solve the problems of product pH increase, damage to material bioactivity and biocompatibility, etc., and achieve simple preparation process, The effect of low cost and simple operation

Active Publication Date: 2019-06-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The volume expansion accompanied by the hydration reaction is very attractive for improving the volume shrinkage of the polymerization. However, during the curing process of the hydration reaction, calcium silicate will generate hydrogel C–S–H and calcium hydroxide, and the generated hydrogen and oxygen The root makes the pH of the product significantly increased (12~13), which destroys the biological activity and biocompatibility of the material

Method used

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  • A kind of ultra-low shrinkage composite resin and preparation method thereof
  • A kind of ultra-low shrinkage composite resin and preparation method thereof
  • A kind of ultra-low shrinkage composite resin and preparation method thereof

Examples

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Embodiment 1

[0035] This embodiment provides an ultra-low shrinkage composite resin and a preparation method thereof, and the specific technical scheme is as follows:

[0036] 1. Synthesis and microstructure characterization of new ultra-low shrinkage composite resin

[0037] The ultra-low shrinkage composite resin is composed of 30wt% resin matrix and 70wt% inorganic filler, wherein: the resin matrix contains 49.5wt% Bis-GMA, 49.5wt% TEGDMA, 0.5wt% CQ, 0.5 wt% of DMAEMA; the inorganic filler is barium glass powder (average diameter 0.8 μm) silanized on the surface, and silicon calcium phosphate powder (mass ratio of calcium silicate to calcium superphosphate is 9:1) is respectively mixed with 0wt%, 10wt%, 20wt% partially replace the inorganic filler of the composite resin, add to the composite resin and mix evenly. The specific ratio of materials is shown in Table 1.

[0038] Table 1 Synthesized composite resin components and ratio

[0039]

[0040] The preparation steps of the abov...

Embodiment 2

[0063] The difference between this example and Example 1 is that the ultra-low shrinkage composite resin is composed of 50wt% resin matrix and 50wt% inorganic filler, wherein: the resin monomer is UTMA, the diluent is EGDMA, the mass of the two The ratio is 70 / 30; the photoinitiator is benzil, and the organic amine activator is EDB, and the content of the two in the resin matrix is ​​0.3wt%; the inorganic filler is the quartz powder of surface silanization, and the Calcium silicon phosphate powder is used to replace inorganic fillers at 0wt%, 10wt%, and 20wt%.

Embodiment 3

[0065] The difference between this embodiment and Example 1 is: the resin monomer is Bis-EMA and Bis-GMA, the mass ratio of the two is 1:1, and the diluent is cyclohexamethylene glycol dimethacrylate, The mass ratio of resin monomer and diluent is 60 / 40; Described photoinitiator is trimethylbenzoyl, and organic amine activator is DMT, and the content of both in resin matrix is ​​0.7wt%; Described The inorganic filler is porcelain powder with a silanized surface, and the silicon calcium phosphate powder is partially replaced by 0wt%, 10wt%, and 20wt% of the inorganic filler.

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Abstract

The invention discloses an ultralow-shrinkage composite resin and a preparation method thereof. The ultralow-shrinkage composite resin is formed by compounding a resin matrix and inorganic filler. The resin matrix comprises a monomer system and an igniter system which are polymerizable. The inorganic filler comprises inorganic filler obtained after surface silylanization and calcium silicon-phosphate powder. Artificial bone cement-calcium silicon-phosphate are applied to a dental composite resin material, the calcium silicon-phosphate powder suffers from volume expansion after being subjected to a hydration reaction, compensation for polymerization volume shrinkage of the composite resin can be effectively achieved, the volume stability of the composite resin can be improved, and meanwhile mechanical indexes of the composite resin can meet the requirements of clinical dental materials. In addition, the preparation process is simple, cost is low, and important popularization and application value is achieved. The calcium silicon-phosphate filler has wide application prospects in the field of mouth rehabilitation through the characteristics.

Description

technical field [0001] The invention belongs to the technical field of biomedical polymer materials, and relates to an ultra-low shrinkage dental composite resin and a preparation method thereof. Background technique [0002] The problem of polymerization shrinkage in dental composite resins has plagued people for many years. The composite resin undergoes a polymerization reaction under the irradiation of visible light of a specific wavelength, and the molecules are cross-linked by van der Waals force to form a covalent bond, which shortens the distance between atoms from the original 0.3~0.5nm to 0.154nm. In addition, the free volume of the composite resin is compressed during the polymerization reaction. The macroscopic manifestation of these phenomena is the volume shrinkage of the polymer. At present, the volume shrinkage of clinically applied dental composite resins is generally 3.0~3.5vol.%. [0003] The polymerization shrinkage of dental composite resins will cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/083A61K6/00C08F220/32C08F222/14C08F2/44
CPCA61K6/18A61K6/74A61K6/76A61K6/77A61K6/887C08F2/44C08F220/32C08F220/325C08F222/10C08F222/102C08L33/14
Inventor 吴晓蓉孙智一孙毅谢伟丽刘一志
Owner HARBIN INST OF TECH
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