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Preparation method of light-cured materials for teeth

A curing material, water-alcoholic technology, applied in dental preparations, dentistry, dental prosthesis, etc., can solve the problem that the contribution of light-cured dental composite resin to strengthening and toughening does not fully take into account the pull-out toughening mechanism, and cannot be fully, Comprehensive display, weak anchoring force and other problems, to achieve the effect of not easy to mix obstacles, strong binding force, and improve toughness

Inactive Publication Date: 2011-09-07
中国人民解放军南京军区福州总医院四七六临床部
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the components of light-cured dental composite resins, the inorganic fillers added to increase strength and wear resistance mostly use amorphous particles, which can play a role similar to spherical particles in composite resins. In the surface layer of dental composite resin, the bonding surface between the amorphous particles and the resin matrix is ​​small, the anchoring force is weak, and it is easy to peel off during the friction process. This factor makes the amorphous particles play an important role in improving the wear resistance of dental composite resins. On the other hand, in the cured dental composite resin body, the shape of the amorphous particles is roughly approximate to a spherical shape, and the contribution to the strengthening and toughening of the light-cured dental composite resin is not fully considered. There are some deficiencies in pulling out the toughening mechanism
[0005] In order to make full use of the pull-out toughening mechanism to strengthen light-cured dental composite resins, in recent years, glass fibers with high aspect ratios, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers are worth considering. The inorganic fillers have attracted the attention of some R&D personnel. Undoubtedly, if this kind of inorganic fillers with high aspect ratio can be uniformly mixed into the resin, it will provide a positive benefit to the strengthening and toughening of light-cured dental composite resins. However, glass fibers with high aspect ratios, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers are difficult to mix evenly into the resin matrix due to their inherent physical appearance. In other words, uniform mixing becomes An insurmountable obstacle, this factor has prevented the application of inorganic materials such as glass fibers with high aspect ratios, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers in light-curing dental composite resins. Full and comprehensive application, which is especially evident in the field of light-curing dental composite resin materials for cavity filling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 10.00 grams of flaky silica particles, and 50.00 grams of barium strontium boron glass powder, and 40.00 grams of borosilicate glass powder, and mix the above three components uniformly by mechanical stirring to make a total weight of 100.00 gram of nano-inorganic powder containing multiple components, ready for use; wherein the sheet width of the sheet-like silica particles involved is between 0.3 microns and 36.0 microns, and the sheet of the sheet-like silica particles involved The ratio of the width to the thickness of the plate is between 3 and 40, and any flake-shaped silica particle material that satisfies the limitation of the width of the plate and the ratio of the width of the plate to the thickness of the plate can be used.

[0034] 2.50 grams of medical-grade silane coupling agent KH-570 were hydrolyzed under the action of acetic acid, and 40 milliliters of hydroalcoholic solution was added. The pre-mixed nano-inorganic powder containing multiple compo...

Embodiment 2

[0037] Weigh 80.00 grams of flaky silica particles, and 15.00 grams of barium strontium boron glass powder, and 5.00 grams of nano-hydroxyapatite, and mix the above three components uniformly by mechanical stirring to make a total weight of 100.00 grams of nano-inorganic powders containing multiple components, ready for use; wherein the sheet width of the sheet-like silica particles involved is between 0.3 microns and 36.0 microns, and the sheet of the sheet-like silica particles involved The ratio of the sheet width to the sheet thickness is between 3 and 40, and any sheet-shaped silica particle material that satisfies the above-mentioned sheet width limitation and the above-mentioned sheet width-to-sheet thickness ratio limitation can be used.

[0038] 2.00 grams of medical grade silane coupling agent KH-570 was hydrolyzed under the action of acetic acid, and 400 milliliters of hydroalcoholic solution was added. The premixed nano-inorganic powder containing multiple componen...

Embodiment 3

[0041] Weigh 45.00 grams of flaky silica particles, and, 25.00 grams of barium strontium boron glass powder, and, 10.00 grams of nano-hydroxyapatite, and, 5.00 grams of strontium glass powder, and, 5.00 grams of boron aluminum glass powder, and, 10.00 grams of commercially available barium-aluminum glass powder are uniformly mixed with the above multiple components by mechanical stirring to make a total weight of 100.00 grams of nano-inorganic powders containing multiple components for subsequent use; wherein the flaky two The silica particles have a plate width between 0.3 microns and 36.0 microns, and the plate-like silica particles have a plate width to plate thickness ratio between 3 and 40, provided that the plate Platelet silica particulate material of defined plate width and defined plate width to plate thickness ratio can be used.

[0042] 10.00 grams of medical grade silane coupling agent KH-570 was hydrolyzed under the action of acetic acid, and 200 milliliters of hy...

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PUM

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Abstract

The invention relates to a preparation method of light-cured materials for teeth, belonging to the field of preparation for medical and dental use. The technical proposal aims at solving the problem that current light-cured dental composite resin materials used for cavity filling are poor in wear-resisting properties and toughness. The method comprises the following steps: silane coupling agent isadopted to carry out surface modification on inorganic nano powder; the modified inorganic nano powder is evenly mixed with relevant monomers, thinners, light initiators, coinitiators and the like indark places; bubbles are eliminated under vacuum. The technical proposal has the key point that the inorganic nano powder contains flaky silica particles accounting for 10-80% of the inorganic nano powder by weight; the width of the flaky silica particles fluctuates between 0.3 micron and 36.0 microns and the ratio of the width to the thickness of the flaky silica particles is between 3 and 40. The flaky silica particles added in the light-cured materials conduce to improving the wear-resisting properties and toughness of the light-cured materials.

Description

technical field [0001] The invention relates to a method for preparing a light-cured material for teeth, and belongs to the field of A61K medical and dental preparations. Background technique [0002] Dental caries patients account for more than half of the country's population. According to estimates by relevant scholars, if each patient with dental caries has two caries on average, there are 1.3 billion carious teeth in my country to be filled and repaired, which requires a large amount of dental filling materials. Silver amalgam is an alloy synthesized by grinding mercury and silver alloy powder. It is the most widely used filling material in stomatology. Strictly, it must be flat and straight, and the point and line angles are clear, which increases the loss of tooth tissue and also aggravates the stimulation of the dental pulp; silver amalgam is a good conductor of heat and can conduct cold and heat stimulation: silver amalgam Slightly soluble in saliva, and can gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/083A61K6/02
Inventor 李榕卿
Owner 中国人民解放军南京军区福州总医院四七六临床部