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Photo-curing composition for tooth

A technology of composition and silica, applied in the direction of dentistry, dental preparations, dental prostheses, etc., can solve the problem that the contribution of dental composite resin to strengthening and toughening does not fully take into account the pulling out toughening mechanism, and cannot be fully and comprehensively In order to achieve the effects of strong bonding force, increased wear resistance, and increased wear resistance

Inactive Publication Date: 2009-10-28
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 body of the dental composite resin after curing, the morphology of the amorphous particles is roughly approximate to a spherical shape, and the contribution to the strengthening and toughening of the dental composite resin is not fully taken into account. There are some deficiencies due to the toughening mechanism
[0005] In order to make full use of the pull-out toughening mechanism to strengthen dental composite resins, in recent years, glass fibers with high aspect ratios, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers have been considered as inorganic materials. Fillers have attracted the attention of some researchers. Undoubtedly, if this type of inorganic filler with a 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. This factor makes the application of inorganic materials such as glass fibers with high aspect ratio, silicon carbide whiskers, silicon nitride whiskers and aluminum borate whiskers in light-curing dental composite resins not fully realized. , comprehensive display, and this is especially evident in the field of light-curing dental composite resin materials for caries filling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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.

[0026] 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 compone...

Embodiment 2

[0029] 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.

[0030] 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

[0033] 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.

[0034] 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 photo-curing composition for tooth, with belongs to the field of preparation for dentistry. The object of the invention is to solve the problem that the abrasion resistance and obdurability of photo-curing dentistry compound resin material for filling tooth cavity is needed to be improved urgently. The composition provided by the invention comprises the following components, in mass percentages, nano inorganic powder treated by surface modification with silicone hydride coupling agent 20-85%; resin monomer such as bisphenol A glycidyl methacrylate 8%-70%; fluidifying agent such as triethylene glycol dimethacrylate 5%-25%; photoinitiator such as camphorquinon 0.25%-2%; coinitiator such as 2-(dimethylamino)ethyl methacrylate 0.5%-3%; the main point of the invention is the nano inorganic powder contains flaky alumina granules 10-80 wt.% based on its own weight. Flaky alumina granule component in the composition provided by the invention contributes to improve abrasion resistance and obdurability of photo-curing material.

Description

technical field [0001] The invention relates to a dental photocurable composition, which belongs to the field of A61K medical and dental preparations. Background technique [0002] In view of the fact that the incidence of dental caries is still high at present, there is still a large demand for medical application of materials for caries filling. The in-depth research and development of such materials has practical significance in promoting the progress of medical technology; in the cooperation of chemical material experts and dental medical experts With joint efforts, in recent years, the use of light-cured dental composite resin materials as caries filling materials has gradually been generally accepted. [0003] Light-curable dental composite resin material is also called visible light-curable composite resin (VLC), which uses visible light of specific wavelength and intensity to initiate polymerization. Most of the products in the past were ultraviolet (UV) curable mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/083A61K6/033A61K6/838
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
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