A kind of machinable dental composite resin and its preparation method

A technology of composite resin and cutting teeth, which is applied in dental preparations, dentistry, dental prosthesis and other directions, can solve the problems of difficult to obtain composite resin with filler content, difficulty of composite resin, etc., and achieve excellent physical and mechanical properties, low cost of raw materials, and aesthetic properties. Good results

Active Publication Date: 2018-04-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the size of the filler is reduced to the nanometer level, the viscosity of the slurry increases greatly, and it becomes more and more difficult to prepare a composite resin by the traditional mixing method, and it is difficult to obtain a composite resin with a high filler content, especially when the filler is a porous filler. The large specific surface area of ​​the filler makes this problem even more prominent

Method used

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  • A kind of machinable dental composite resin and its preparation method
  • A kind of machinable dental composite resin and its preparation method
  • A kind of machinable dental composite resin and its preparation method

Examples

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preparation example Construction

[0025] A kind of preparation method of machinable dental composite resin of the present invention, it specifically comprises the following steps:

[0026] 1) Mix the modified mesoporous silica and fumed silica by ball milling at a mass ratio of 1:5 to 1:3, press the mixed powder into a block, and cold isostatic press at 0 to 200 MPa , to obtain a ceramic block;

[0027] 2) Mix the resin matrix and initiator uniformly according to the stated ratio, then put the ceramic block obtained above into the resin matrix, and then put the whole into a vacuum oven, keep the reading of the vacuum gauge below -0.06, and make the resin matrix impregnated into the ceramic block;

[0028] 3) The ceramic block impregnated with the resin matrix is ​​taken out, and thermally cured at 100° C. to 140° C. to obtain a machinable dental composite resin.

[0029] The percentage sign "%" involved in the following examples refers to mass percentage unless otherwise specified; the experimental methods u...

Embodiment 1

[0033] 1) Mix mesoporous silica, γ-methacryloxypropyltrimethoxysilane and absolute ethanol evenly, adjust the pH of the solution to 5-6, stir to completely evaporate the ethanol, and obtain the modified mesoporous Porous silica; mix fumed silica, γ-methacryloxypropyltrimethoxysilane and absolute ethanol evenly, adjust the pH of the solution to 5-6, heat and stir to completely evaporate the ethanol, and the improved Sexual fumed silica;

[0034] 2) The modified mesoporous silica and fumed silica were mixed by ball milling at a mass ratio of 1:5. After pressing the mixed powder into a block, a ceramic block is obtained;

[0035] 3) Mix the resin matrix according to the ratio of the formula in Table 1, then put the ceramic block obtained above into a beaker containing the matrix, put the beaker into a vacuum oven, and maintain a vacuum of -0.08, so that the matrix is ​​infiltrated into the ceramic block middle;

[0036] 4) Take out the ceramic block impregnated with the matrix...

Embodiment 2

[0038] 1) with embodiment 1 step 1);

[0039] 2) The modified mesoporous silica and fumed silica were mixed by ball milling at a mass ratio of 1:4. After pressing the mixed powder into a block, 200MPa cold isostatic pressing to obtain a ceramic block;

[0040] 3) Mix the resin matrix according to the ratio of the formula in Table 1, then put the ceramic block obtained above into a beaker containing the matrix, put the beaker into a vacuum oven, and keep the vacuum at -0.1, so that the matrix is ​​infiltrated into the ceramic block middle;

[0041] 4) Take out the ceramic block impregnated with the matrix, and heat-cure at 140°C to obtain a machinable dental material.

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Abstract

The invention relates to machinable dental composite resin and a preparation method thereof, and belongs to composite materials for machinable dental restoration. The composite resin is prepared from 32.4-49.8 percent of resin matrix, 0.2-1.0 percent of initiator and 50-67 percent of silane coupling agent modified inorganic filler. The preparation method comprises the following steps: performing surface modification on mesoporous silica and fumed silica by a silane coupling agent; then, mixing the modified mesoporous silica and fumed silica according to a proportion, compacting to form a ceramic block; and immersing the ceramic block in the resin matrix containing the initiator, and thermocuring after the immersed ceramic block is taken out so as to prepare the machinable dental composite resin. The composite resin has good light transmission, excellent physical and mechanical performance, easily available and cheap raw materials and simple preparation method, is suitable for industrial production, and can be used in composite materials for machinable dental restoration.

Description

technical field [0001] The invention belongs to the field of composite resin and its preparation, in particular to a machinable composite resin for dental restoration with mesoporous silicon dioxide and fumed silicon dioxide as fillers and a preparation method thereof. Background technique [0002] For more than two decades, computer-aided design / manufacturing (CAD / CAM) has been more and more widely used in the field of dental restoration, and its further development in the field of stomatology is inseparable from machinable dental materials that can be used in conjunction with it support. Ceramic materials, such as crystallized glass, zirconia ceramics, etc., have excellent mechanical properties and good aesthetics, but they are brittle, have poor machinability, and wear a lot on adjacent teeth, so they are not CAD / The best choice for CAM supporting materials. Composite resin materials have attracted much attention due to their good aesthetic properties and processabilit...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): A61K6/087A61K6/027C08F220/32C08F222/20C08K9/06C08K7/26C08K3/36A61K6/891
Inventor林元华杨青李明南策文
OwnerTSINGHUA UNIV