Preparation of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration

A hyperbranched polymer-based dental technology, applied in the field of preparation of dental restorative materials, can solve the problems of increased polymerization shrinkage rate of total content and no further exploration, and achieves reduced polymerization shrinkage rate, excellent fluidity, and ease of clinical use. effect of operation

Active Publication Date: 2021-07-16
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such a method achieves the repair of defects, it will inevitably bring new problems: the increase in the total content of organic monomers will cause a large increase in the polymerization shrinkage after polymerization.
At present, this kind of research mainly focuses on the general-purpose composite resin system, or only introduces hyperbranched molecules as one of the components of the organic monomer into the flow resin system to explore its influence on the performance of the flow resin, and has not been further explored. Using hyperbranched molecules as the main organic monomer components to completely replace Bis-GMA to achieve ultra-low polymerization shrinkage and Bis-GMA-free dental restoration flow resin

Method used

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  • Preparation of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration
  • Preparation of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration
  • Preparation of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation method of low-shrinkage non-Bis-GMA-based dental restoration hyperbranched polyurethane-ester fluid resin, the specific process is as follows:

[0049] (1) Preparation of silanized inorganic filler:

[0050] The inorganic filler is prepared by surface modification treatment. The specific method of surface modification treatment is: add 50g inorganic filler to 600mL cyclohexane, stir and react in an oil bath at 40°C for 20min, then add 5.5mL n-propylamine and 3.3 mLγ-(methacryloyloxy)propyltrimethyloxysilane was stirred and reacted at 70°C for 20 minutes. During the reaction, the stirring speed was kept at 650r / min; Rinse with ethanol several times, filter, and then dry in a vacuum oven at 60°C for 24 hours to obtain silanized inorganic fillers;

[0051] Wherein, the inorganic filler is a mixture of micron silica (particle diameter is 1 μm) and nano silica (particle diameter is 20nm) with a weight ratio of 3:1;

[0052] (2) Preparation of modified hyper...

Embodiment 2

[0063] The preparation method of low-shrinkage non-Bis-GMA-based dental restoration hyperbranched polyurethane-ester fluid resin, the specific process is as follows:

[0064] (1) Preparation of silanized inorganic filler:

[0065] The inorganic filler is prepared by surface modification treatment. The specific method of surface modification treatment is: add 50g inorganic filler to 600mL cyclohexane, stir and react in an oil bath at 40°C for 20min, then add 5.5mL n-propylamine and 3.3 mLγ-(methacryloyloxy)propyltrimethyloxysilane was stirred and reacted at 70°C for 20 minutes. During the reaction, the stirring speed was kept at 650r / min; Rinse with ethanol several times, filter, and then dry in a vacuum oven at 60°C for 24 hours to obtain silanized inorganic fillers;

[0066] Wherein, the inorganic filler is a mixture of micron silica (particle diameter is 1 μm) and nano silica (particle diameter is 20nm) with a weight ratio of 3:1;

[0067] (2) Preparation of modified hyperbr...

Embodiment 3

[0083] The preparation method of low-shrinkage non-Bis-GMA-based dental restoration hyperbranched polyurethane-ester fluid resin, the specific process is as follows:

[0084] (1) Preparation of silanized inorganic filler:

[0085] The inorganic filler is prepared by surface modification treatment. The specific method of surface modification treatment is: add 50g inorganic filler to 600mL cyclohexane, stir and react in an oil bath at 30°C for 20min, then add 5.5mL n-propylamine and 3.3 mL of vinyltriethoxysilane was stirred and reacted at 60°C for 30min. During the reaction, the stirring speed was kept at 650r / min; Drying in a vacuum oven at 60°C for 24 hours to obtain a silanized inorganic filler;

[0086] Wherein, the inorganic filler is a mixture of micron silica (particle diameter is 2 μm) and nano silica (particle diameter is 60nm) with a weight ratio of 4:1;

[0087] (2) Preparation of modified hyperbranched polyamine-ester:

[0088] (1) Mix pentaerythritol, N,N-dihydr...

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Abstract

The invention relates to a preparation method of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration, which comprises the steps of mixing polyhydric alcohol, an AB2 type branched monomer and a catalyst, and preparing polyhydroxy hyperbranched polyamine-ester (HPAE) by taking the polyhydric alcohol as a core and adopting a quasi-one-step polycondensation method; preparing modified hyperbranched polyamine-ester molecules containing double bonds and polyurethane groups through polyurethane chemistry, and uniformly mixing the modified hyperbranched polyamine-ester molecules with a diluent, a silanized inorganic filler and a photoinitiator through a three-roller grinder to obtain the uncured flowable flowing resin for dental restoration, wherein the flowing resin has the characteristic of low polymerization shrinkage rate and does not contain Bis-GMA organic components. The prepared flowing resin has low viscosity and good fluidity before photocuring, the polymerization shrinkage rate of a composite resin material can be greatly reduced after photocuring, the problem of potential toxicity caused by release of bisphenol A does not exist, and the requirements of repairing and treating small defects which are difficult to fill, small-area dental caries on the maxillofacial surface in preventive repairing and dental caries in a narrower area can be effectively met.

Description

technical field [0001] The invention belongs to the technical field of preparation of materials for dental restoration, and relates to the preparation of a low-shrinkage non-Bis-GMA-based dental restoration hyperbranched polyamine-ester fluid resin. Background technique [0002] With the improvement of civilization, dental caries, as the most common oral disease, not only directly affects the facial appearance and chewing function of patients, but also causes serious systemic and non-infectious chronic diseases, so its treatment and restoration have changed. is extremely important. The main way to treat caries is direct filling and repairing. The core of restorative treatment is the restorative material used. With the rapid development of material technology, this kind of restorative material has developed from the early amalgam to the current mainstream general-purpose composite resin for dental restoration. Studies have fully confirmed that this kind of restorative materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F222/20C08K9/06C08K3/36A61K6/887
CPCC08F283/002C08K9/06C08K3/36A61K6/887C08K2201/014C08F222/102
Inventor 江晓泽朱美芳沈君任志伟陆梦娇李启明王瑞莉孙宾
Owner DONGHUA UNIV
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