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DMC-MMA (methyl methacrylate)-halloysite copolymerized denture base material and preparation method thereof

A technology of polymethacryloyloxyethyltrimethylammonium chloride and methacryloyloxyethyltrimethylammonium chloride, applied in dental preparations, pharmaceutical formulations, dental prostheses, etc., can solve basic Bracket fracture, mechanical properties can not fully meet the oral restoration, the upper denture is easy to longitudinal fracture and other problems

Inactive Publication Date: 2014-03-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor strength of the PMMA resin itself and the existence of internal stress during the curing process, the toughness and strength of the resin material are low, which leads to the vertical fracture of the upper denture in clinical restoration, and the fracture of the base often occurs during occlusion. The mechanical properties of PMMA cannot fully meet the requirements of oral restoration. Even with the best clinical experience, selection of indications, arrangement of artificial teeth and the most reasonable operating procedures, PMMA base materials still have mechanical strength problems, especially The impact strength is poor, which often causes the breakage of the base, and causes bacterial flora imbalance leading to denture stomatitis

Method used

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  • DMC-MMA (methyl methacrylate)-halloysite copolymerized denture base material and preparation method thereof
  • DMC-MMA (methyl methacrylate)-halloysite copolymerized denture base material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Mix 1.8g of DMC and 58.2g of MMA monomer and add it to a three-necked flask (the total amount of monomer is 60mL), add 3g of HNTs, ultrasonically disperse the suspension, and add 1.5g of hydroxyethyl cellulose in 150mL of deionized water (HEC) and 0.075g sodium dodecylbenzene sulfonate (SDBS), pour it into a three-necked flask after preliminary stirring, and continue stirring at a low speed. Pass N 2 After 40 minutes of protection, the temperature was raised to 90° C., and the inert atmosphere was maintained continuously, and 0.4 g of initiator BPO was added to initiate polymerization. After reacting for 9 hours, the reaction system was cooled and filtered, the filtered product was repeatedly washed with deionized water, and vacuum-dried at 60°C to a constant weight to obtain a P(MMA-co-DMC) / HNTs nanocomposite;

[0025] (2) Mix the P(MMA-DMC) / HNTs copolymer product (powder) with the thermosetting tray water according to the mass ratio of 1:1, take it out after the ...

Embodiment 2

[0028](1) Mix 3gDMC and 57gMMA monomers and add them into a three-necked flask (the total amount of monomers is 60mL), add 0.6gHNTs, and ultrasonically disperse the suspension, and add 1.8g hydroxyethyl cellulose to 150mL deionized water ( HEC) and 0.067g sodium dodecylbenzene sulfonate (SDBS), it is poured into the there-necked flask after initial stirring, and continues stirring at a low speed. Pass N 2 After 40 minutes of protection, the temperature was raised to 90° C., and the inert atmosphere was maintained continuously, and 0.4 g of initiator BPO was added to initiate polymerization. After reacting for 9 hours, the reaction system was cooled and filtered, the filtered product was repeatedly washed with deionized water, and vacuum-dried to a constant weight at 60°C to obtain a P(MMA-co-DMC) / HNTs nanocomposite;

[0029] (2) Mix the P(MMA-DMC) / HNTs copolymerization product (powder) with the thermosetting tray water according to the mass ratio of 1:1, take it out after the...

Embodiment 3

[0032] (1) Mix 6gDMC and 54gMMA monomers and add them into a three-neck flask (the total amount of monomers is 60mL), add 0.9gHNTs, and ultrasonically disperse the suspension, and add 1.6g hydroxyethyl cellulose to 150mL deionized water ( HEC) and 0.075g sodium dodecylbenzene sulfonate (SDBS), it is poured into the there-necked flask after preliminary stirring, and continues stirring at a low speed. Pass N 2 After 40 minutes of protection, the temperature was raised to 90° C., and the inert atmosphere was maintained continuously, and 0.6 g of initiator BPO was added to initiate polymerization. After reacting for 9 hours, the reaction system was cooled and filtered, the filtered product was repeatedly washed with deionized water, and vacuum-dried to a constant weight at 60°C to obtain a P(MMA-co-DMC) / HNTs nanocomposite;

[0033] (2) Mix the P(MMA-DMC) / HNTs copolymerization product (powder) with the thermosetting tray water according to the mass ratio of 1:1, take it out after ...

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Abstract

The invention discloses a DMC-MMA (methyl methacrylate)-halloysite copolymerized denture base material and a preparation method thereof. According to the invention, the charge environment of the polymeric substrate of the first monomer MMA is regulated and controlled through the second monomer DMC, and the two monomers are copolymerized through the suspension polymerization method, HNTs is added and compounded with the copolymerized product, and after the copolymerized product is mixed with thermosetting type dental base acrylic resin liquid, the mixture is heated and cured. According to the invention, the MMA is used as a base material, and the nanocomposite is prepared by adopting the in situ suspension polymerization method to regulate and control the charge environment of the substrate, and the halloysite nano filler is added for polymerization, so that the relatively pure PMMA resin is obtained, and the bending strength and the tensile strength of the denture base material are greatly improved to a great extent, the dispersity of halloysite in the substrate is successfully improved, and the problem about the mechanical strength, particularly the bending strength of the PMMA denture base material, is solved.

Description

technical field [0001] The invention belongs to the field of oral biomaterials, and more specifically relates to a polymethyl methacrylate (PMMA) denture base material, in particular PMMA is used as a matrix to regulate the charge environment of the matrix, and halloysite nanotubes (HNTs) are filled. ), to prepare PMMA-based nanocomposites. Background technique [0002] With the progress of society and the improvement of living standards, people have increasingly strong requirements for aesthetic restoration and higher requirements for oral materials. At the same time, the persistence of teeth has changed the spectrum of oral diseases. According to relevant data, the incidence rate of dental caries in our country is 37%, with an average of 2.47 caries per person. Based on a population of 1.2 billion, there are nearly 500 million caries patients in the country, and the total number of caries is more than 1 billion. Among adults, about 80% suffer from periodontal disease, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/083A61K6/027C08F220/14C08F220/34C08F2/18C08F2/20
Inventor 郑俊萍王佩佩王翔
Owner TIANJIN UNIV
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