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Caries-filling composition depending on photo-initiated crosslinking polymerization curing reaction mechanism

A technology of cross-linking polymerization and curing reaction, which is applied in dental preparations, medical science, dentistry, etc., and can solve the problems that the contribution of strengthening and toughening does not fully take into account the pull-out toughening mechanism, the application cannot be displayed, and the anchoring force is weak. , to achieve the effects of strong bonding, increased strength and toughness, and increased wear resistance

Inactive Publication Date: 2009-11-18
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

[0003] Among the components of the dental composite resin of the single paste formula for caries filling, the inorganic fillers added to increase the strength and wear resistance are mostly amorphous particles, which can play a role similar to spherical particles in the caries filling composite resin. Particles, in the surface layer of dental composite resin for dental caries filling after polymerization reaction curing, the bonding surface between amorphous particles and resin matrix is ​​small, the anchoring force is therefore weak, and it is easy to peel off during the friction process. This factor makes The role of amorphous particles in improving the wear resistance of dental composite resin for caries filling is compromised. On the other hand, in the body of dental composite resin for caries filling after curing, the shape of amorphous particles is roughly approximately spherical. However, the contribution to the strengthening and toughening of dental composite resins for caries filling is also somewhat lacking due to the failure to fully take into account the pullout toughening mechanism.
[0004] In order to make full use of the pull-out toughening mechanism to strengthen dental composite resins for dental caries, in recent years, glass fibers with high aspect ratios, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers have been used as worthy candidates. The inorganic fillers considered have attracted the attention of some R&D personnel. Undoubtedly, if this type of inorganic fillers with high aspect ratio can be uniformly mixed into the resin for caries filling, it will provide an opportunity for the strengthening and toughening of dental composite resins for caries filling. Positive benefits, however, glass fibers with high aspect ratios, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers are difficult to mix evenly into the caries filling resin matrix due to their inherent physical morphology In other words, uniform mixing becomes an insurmountable obstacle. This factor makes inorganic materials such as glass fibers, silicon carbide whiskers, silicon nitride whiskers, and aluminum borate whiskers with high aspect ratios used in caries filling. Applications in dental composite resins failed to take off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 10.00 grams of flaky hydroxyapatite, 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 1 00.00 grams of nano-inorganic powders containing multiple components, ready for use; wherein the slab width of the flaky hydroxyapatite involved is between 0.3 microns and 36.0 microns, and the slab width of the flaky hydroxyapatite involved The ratio of the sheet width to the sheet thickness is between 3 and 40, and any sheet-shaped hydroxyapatite material that satisfies the restrictions on the sheet width and the ratio of the sheet width to the sheet thickness can be used.

[0025] 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 ultrason...

Embodiment 2

[0028]Weigh 80.00 grams of flaky hydroxyapatite and 20.00 grams of barium strontium boron glass powder, and mix the above three components uniformly by mechanical stirring to make a nano-inorganic nano-organic compound with a total weight of 100.00 grams containing multiple components. Powder, ready for use; wherein the plate width of the flaky hydroxyapatite is between 0.3 micron and 36.0 microns, and the ratio of the plate width to the plate thickness of the flaky hydroxyapatite is between Between 3 and 40, any flaky hydroxyapatite 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.

[0029] 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 hou...

Embodiment 3

[0032] Weigh 45.00 grams of flaky hydroxyapatite, and 25.00 grams of barium-strontium-boron glass powder, and 10.00 grams of strontium glass powder, and 10.00 grams of boron-aluminum glass powder, and 10.00 grams of commercially available barium-aluminum glass powder, The above multiple components are uniformly mixed by means of mechanical stirring to make a nano-inorganic powder with a total weight of 100.00 grams containing multiple components for future use; wherein the sheet width of the flaky hydroxyapatite involved is between 0.3 microns and 36.0 microns, and the ratio of plate width to plate thickness of the flaky hydroxyapatite is between 3 and 40, where said plate width limitation and said plate width and Any plate-shaped hydroxyapatite material having a defined ratio of plate thickness can be used.

[0033] 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...

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Abstract

The invention relates to a caries-filling composition depending on photo-initiated crosslinking polymerization curing reaction mechanism, belonging to the field of preparation for dentistry. At present, the performances of caries-filling composite resin material on wearability and toughness need to be improved urgently, and the invention aims at solving the problem. The composition comprises the following compositions by weight: 20-85% of nano-inorganic powder with the surface modified by a silane coupling agent, 8-70% of resin monomer such as bisphenol A-glycidyl methacrylate, 5-25% of thinner such as triethylene-glycol dimethacrylate, 0.25-2% of photo-initiator such as camphorquinone, and 0.5-3% of coinitiator such as dimethylaminoethyl methacrylate. The key point is as follows: the nano-inorganic powder contains the flaky hydroxyapatite which accounts for 10-80% of the weight of the nano-inorganic powder. The flaky hydroxyapatite in the composition can be beneficial to improving the wearability and the dbdurability of the material.

Description

technical field [0001] The invention relates to a composition for caries filling based on a light-induced cross-linking polymerization curing reaction mechanism, which belongs to the field of A61K medical and dental preparations. Background technique [0002] Dental composite resin materials with a single paste formulation for caries filling have been gradually promoted in clinical use. [0003] Among the components of the dental composite resin of the single paste formula for caries filling, the inorganic fillers added to increase the strength and wear resistance are mostly amorphous particles, which can play a role similar to spherical particles in the caries filling composite resin. Particles, in the surface layer of dental composite resin for dental caries filling after polymerization reaction curing, the bonding surface between amorphous particles and resin matrix is ​​small, the anchoring force is therefore weak, and it is easy to peel off during the friction process. ...

Claims

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Application Information

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IPC IPC(8): A61K6/083A61K6/033A61K6/02A61K6/04A61K6/838
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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