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Dental pit and fissure sealant and preparation method thereof

A pit and fissure sealing and dental technology, which is applied in the field of dental pit and fissure sealant and its preparation, can solve the problems of difficulty in uniform dispersion of ultrafine inorganic fillers, increased shrinkage rate of pit and fissure sealant, low bonding strength, etc. Accelerated polymerization and curing process, less heat release, high bonding strength

Active Publication Date: 2018-08-24
北京安泰生物医用材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its storage period is still shorter than that of Bis-GMA resin monomers, the polymerization conversion rate is low, and its bonding strength is not high
[0008] Although the basic formula of pit and fissure sealant is mastered by people, it is very difficult to uniformly disperse ultrafine inorganic fillers in high-viscosity monomers, resulting in increased shrinkage and reduced mechanical strength of pit and fissure sealant during curing.

Method used

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  • Dental pit and fissure sealant and preparation method thereof
  • Dental pit and fissure sealant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The specific preparation method of the dental pit and fissure sealant provided by embodiment 1 is as follows:

[0038] (1) Add the components of 100g base resin (the content of each component in the base resin is as described in Table 1) into a planetary mixer and keep the temperature at 25°C, and start the planetary mixer for 30 minutes To mix the resin phase; add 150g concentration of 20wt% nano-zirconia ethanol solution to it and continue mixing for 1 hour, wherein the particle size of zirconium oxide is 5-10nm; The ethanol solvent was removed by drying at -0.1MPa for 1 hour to obtain a mixture of nano zirconia and base resin with a nano zirconia content of 23%.

[0039] (2) Prepare test sample 1 (that is, the mass ratio of the filler to the mixture of nano-zirconia and base resin is 20:80) with 20wt% filler filled into the mixture of nano-zirconia and base resin, with 30wt% filler Filling nano zirconia composite resin to prepare test sample 2 (i.e. the mass ratio o...

Embodiment 2

[0046] The specific preparation method of the dental pit and fissure sealant provided by embodiment 2 is as follows:

[0047] (1) Add the components of 100g base resin (the composition of the base resin in Example 2 of the present invention is as described in Table 3) into a planetary mixer and keep the temperature at 25°C, and start the planetary mixer 30 minutes to mix the resin phase; add 150g of 20% nanometer zirconia ethanol solution to it and continue mixing for 1 hour, wherein the particle size of zirconia is 5-10nm, and the mixed solution is evaporated in a light-proof environment Drying at -0.1 MPa for 1 hour to remove the ethanol solvent to obtain a nano-zirconia composite resin with a nano-zirconia content of 23%.

[0048] (2) Prepare test sample 5 (that is, the mass ratio of the filler to the mixture of nano-zirconia and base resin is 25:75) filled with 25wt% filler into the mixture of nano-zirconia and base resin, with 35wt% filler Filling nano zirconia composite...

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Abstract

The invention relates to a pit and fissure sealant for dentistry and a preparation method thereof, belonging to the field of medical biomaterials. The pit and fissure sealant for dentistry includes the following two substances: a filler with a content of 5-50wt% and an average particle size of 0.010-0.120μm, wherein the content of fillers with a particle size greater than 0.120μm is less than 50wt%; base resin, The content is 50-95wt% and consists of PEGUDMA, DIAUDMA, diluent and photoinitiator. The present invention prepares the pit and fissure sealant by blending the nano-zirconia alcohol solution with the resin monomer and removing the solvent. This method can make the nano-filler disperse more uniformly in the resin monomer, and can be used without affecting the fluidity of the product. The content of nano filler is greatly increased, thereby enhancing the mechanical strength of the product (compressive strength is at least 200MPa), and reducing the polymerization shrinkage rate (less than 5%).

Description

technical field [0001] The invention relates to a pit and fissure sealant for dentistry and a preparation method thereof, belonging to the field of medical biomaterials. Background technique [0002] The principle of pit and fissure sealing to prevent pit and fissure caries is to use polymer materials to fill up the pits and fissures of the teeth to make the tooth surface smooth and easy to clean. On the one hand, after the pits and fissures are sealed, the original bacteria in the pits and fissures cut off the source of nutrition , and gradually die; on the other hand, the cariogenic bacteria outside can no longer enter, so as to achieve the purpose of preventing pit and fissure caries. The sealing material used for pit and fissure sealant is called pit and fissure sealant, which is tightly bonded to the groove wall after curing, and has a certain anti-chewing pressure, which is not harmful to eating, and the pit and fissure sealant is non-toxic after curing, and has no eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/00C08F283/00
CPCC08F283/008A61K6/19A61K6/60A61K6/62A61K6/71A61K6/76C08F222/225C08F220/34
Inventor 李德慧梁新杰高春磊张亚辉陈冬冬张玮琬
Owner 北京安泰生物医用材料有限公司
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