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Teeth composition capable of increasing abrasion resistance and obdurability based on composite modification theory

A technology of wear resistance and compound modification, which is applied in the direction of dentistry, dental preparations, dental prosthesis, etc., can solve the problem that the contribution of 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 strong bonding force, increased wear resistance, and increased wear resistance

Inactive Publication Date: 2009-08-19
李榕卿
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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 silica nanorods, 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 grams The nano-inorganic powder containing multiple components is ready for use; wherein the radial width of the silicon dioxide nanorods involved is less than 200 nanometers, and its aspect ratio is distributed between 3 and 20, as long as the radial width limit and Silica nanorod materials with a defined aspect ratio 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 in ultrasonic waves, and then reacted at 50°C for 24 hours, moved to an oven, and dried at 80°C for 10 hours, then, use the water alcohol The solution was w...

Embodiment 2

[0030] Weigh 80.00 grams of silica nanorods, 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 gram of nano-inorganic powder containing multiple components, for use; wherein the radial width of the silicon dioxide nanorods involved is less than 200 nanometers, and its aspect ratio is distributed between 3 and 20, as long as the radial width limit is met And silica nanorod materials with limited aspect ratio 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 reacted at 100°C for 2 hours, moved to an oven, and dried at 80°C for 2 hours, then, use the water alcohol The solution is washed, then dried a...

Embodiment 3

[0034] Weigh 45.00 grams of silica nanorods, 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 silicon dioxide nano The radial width of the rod is less than 200 nanometers, and its aspect ratio is distributed between 3 and 20. Any silicon dioxide nanorod material that meets the above-mentioned radial width limitation and aspect ratio limitation can be used.

[0035] 10.00 grams of medical grade silane coupling agent KH-570 was hydrolyzed under the action of acetic acid, and 200 milliliters of hydroalcoholic solution was added. The premixed nano-inorganic p...

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Abstract

The invention relates to a composition for teeth for promoting the wear resistance and the toughness by means of a composite modification principle, which belongs to the field of preparations for dentistry. The wear resistance and the toughness of the prior dental composite resin material used for tooth cavity filling need to be improved, and the proposal devotes to solving the problem. The composition comprises the following components in percentage by weight: 20 to 85 percent of nano-inorganic powder of which the surface is modified by a silane coupling agent, 8 to 70 percent of resin monomer (such as bisphenol A-glycidyl methacrylate), 5 to 25 percent of diluting agent (such as triethylene-glycol dimethacrylate), 0.25 to 2 percent of photo initiator (such as camphorquinone), and 0.5 to 3 percent of coinitiator (such as 2-(dimethylamino)ethyl methacrylate). The proposal emphasizes that the nano-inorganic powder contains silicon dioxide nano-rods which account for 10 to 80 percent of the weight of the nano-inorganic powder. The silicon dioxide nano-rods in the composition help to improve the wear resistance and the toughness of materials.

Description

technical field [0001] The invention relates to a dental composition which improves wear resistance and toughness based on the principle of composite modification, and belongs to the field of A61K medical and dental preparations. Background technique [0002] 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 and effective restoration material...

Claims

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Application Information

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IPC IPC(8): A61K6/083C08F20/26C08F20/34C08F2/44C08K9/06C08K3/36
Inventor 李榕卿
Owner 李榕卿
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