Composition for tooth with abrasion resistance and obdurability

A composite and wear-resistant technology, applied in the direction of dentistry, dental preparations, dental prostheses, etc., can solve the problem that the strengthening and toughening contribution of dental composite resins does not fully take into account the pull-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

[0005] Among the components of dental composite resins, the inorganic fillers added to increase strength and wear resistance are mostly amorphous particles, which can play a role similar to spherical particles in composite resins. Dental composites after polymerization and curing The surface layer of the resin, the bonding surface between the amorphous particles and the resin matrix is ​​small, the anchoring force is thus 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 also due to insufficient consideration of the pull-out enhancement. There are some deficiencies in the toughness mechanism
[0006] 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 dental composite resins. However, the long-diameter Glass fibers with high ratio, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers are difficult to mix evenly into the resin matrix due to their inherent physical shape. In other words, uniform mixing becomes an insurmountable Obstacles, 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 dental composite resins not fully and comprehensively displayed. , this is especially evident in the field of dental composite resin materials for caries filling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 10.00 grams of flaky alumina particles, 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 grams The nano-inorganic powder containing multiple components is ready for use; wherein the plate width of the flaky alumina particles involved is between 0.3 microns and 36.0 microns, and the plate width of the flaky alumina particles involved is the same as that of the plate The ratio of sheet thickness is between 3 and 40, and any sheet-shaped alumina particle material that satisfies the restriction on the sheet width and the ratio of sheet width to sheet thickness can be used.

[0027] 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 components is dispersed ...

Embodiment 2

[0030] Weigh 80.00 grams of flaky alumina particles, 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 gram of nano-inorganic powder containing multiple components, ready for use; wherein the plate width of the involved flaky alumina particles is between 0.3 micron and 36.0 microns, and the plate width of the involved flaky alumina particles is the same as The thickness ratio of the plate is between 3 and 40, and any flaky alumina particle material that satisfies the limit of the plate width and the ratio limit of the plate width to the plate thickness can be used.

[0031] 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 components is dispersed in ultrasonic waves, then ...

Embodiment 3

[0034] Weigh 45.00 grams of flaky alumina 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 gram of commercially available barium-aluminum glass powder, the above multiple components are uniformly mixed by means of mechanical stirring, and a total weight of 100.00 grams of nano-inorganic powder containing multiple components is prepared for subsequent use; wherein the flaky alumina The particles have a plate width of between 0.3 microns and 36.0 microns, and the plate-like alumina particles have a plate width to plate thickness ratio of between 3 and 40, where said plate width limitation is met and plate-shaped alumina particle materials defined by the ratio of the plate width to the plate thickness can be used.

[0035] 10.00 grams of medical grade silane coupling agent KH-570 was hydrolyzed under the action of acetic...

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Abstract

The invention relates to a composition for tooth with abrasion resistance and obdurability, which belongs the field of preparation for medical application and dentistry. The object of the invention is to solve the problem that the abrasion resistance and obdurability of 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. Microsized flaky alumina granule component in the composition provided by the invention contributes to improve abrasion resistance and obdurability of material.

Description

technical field [0001] The invention relates to a dental composition which combines wear resistance and toughness, and belongs to the field of A61K medical and dental preparations. Background technique [0002] Caries treatment has a large market demand for related dental filling materials. Dental composite resin is widely used in the restoration and filling of caries because of its high mechanical strength, thermal expansion coefficient similar to that of teeth, good polishing performance, insoluble in saliva, and color similar to teeth. However, the wear resistance and strength and toughness of dental composite resins are not ideal yet. [0003] Dental composite resin, also known as dental composite resin, is a dental restoration material composed of an organic resin matrix, surface-treated inorganic fillers, and an initiating system. It is widely used in direct and indirect repairs of various tooth defects. repair. For a long time, people have been looking for a safe a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/093A61K6/02A61K6/083A61K6/033A61K6/04A61K6/838A61K6/896
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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