96 results about "Dental composite resin" patented technology

The invention relates to organic-inorganic nano composite resin and a preparation method thereof, belonging to the technical field of biomedical high-molecular materials. The organic-inorganic nano composite resin is characterized in that polyfunctional reactive nano monomer, i.e. polyhedral oligosilsesquioxane (POSS) is added on the basis of organic matrixes and inorganic fillers. The preparation method comprises the steps of adding the POSS into the resin matrixes, placing in a constant-temperature oven, fully dissolving the POSS in the resin matrixes and even agitating; adding an initiator system and evenly agitating; adding the inorganic fillers which are subject to surface silanization treatment, fully and evenly agitating in a vacuum agitator and removing air bubbles to obtain nano composite resin paste. By adding the POSS into dental composite resin, polymerization shrinkage can be obviously reduced, the mechanical property of the composite resin is comprehensively improved, the micro-leakage performance and the biocompatibility are good and the application prospect in the field of oral rehabilitation is wide. Besides, the preparation process is simple, the cost is lower and the popularization value and the application value are great.

A shade selection program is disclosed that predicts the shade choice with the smallest CIEDE2000 color difference for dental composite resin restorations when given a backing and target shade. By utilizing generated regression models, a database of spectral reflectance information, and principles of Kubelka-Munk layering, a highly accurate shade selection program was designed. Additionally, a blending model for quantification of color adjustment potential was developed. Systems and methods for correlating RGB data from the VITA Linearguide 3D Master and VITA Bleached Guide 3D Master shade guides with their spectroradiometric correlates through a regression model while indicating a methodology for validation of accuracy of digital imaging systems are disclosed.

A dental polymerizable composition comprising (a) a fluorine compound comprising a chain polymer having a main chain comprising a monomer unit having a hydrophilic group, and terminal groups comprising a fluoroalkyl group at each of both ends of the main chain; (b) a polymerizable monomer; and (c) a polymerization initiator. The dental polymerizable composition can be suitably used, for example, for dental composite resins, such as dental composite filler materials, crowning materials, and bonding materials; dental adhesive agents, such as teeth-straightening adhesive agents, cavity-coating adhesive agents, and tooth fissure sealing materials; denture base materials, denture base mucosal adjusting materials, fissure sealants, coating agents applied to tooth surface or dental prosthetic, surface glazes, and the like, and especially for various coating applications, for example, a fissure sealant, a coating agent to tooth surface or dental prosthetic, surface stains or a surface glaze, a hypersensitive inhibitor, a dental manicure, or the like.

The invention relates to a dental composite resin material with a low polymerization shrinkage rate, which belongs to the technical field of composite resin materials for repairing or remaking tooth. The dental composite resin material is formed in a mode that a composite resin monomer mixture is mixed with inorganic filler. The composite resin monomer mixture consists of a macro monomer, an acrylate monomer with a vinyl as an end group, an acrylate monomer containing two double bonds and an initiator. The macro monomer is an aromatic polyester low polymer with two or three double bonds. In the invention, the macro monomer is added into the composite resin material; and the macro monomer has the characteristics of low viscosity, high molecular weight and the like, so that the using amount of the inorganic filler can be increased and the polymerization shrinkage rate can be reduced, and thus, the edge micro leakage caused by volume shrinkage in the polymerization process of the materials is reduced and the occurrence probability of secondary caries is reduced.

The invention provides a dentin reactive monomer mixture and a preparing method, a polycarboxylic oligomer and a preparing method, and dental composite resin bonding systems, wherein the dentin reactive monomer mixture and the polycarboxylic oligomer are used for constructing the dental composite resin bonding systems. The invention further provides a single-component dental composite resin bonding systems and a double-component dental composite resin bonding system. The bonding systems overcome the defect that due to the fact that a large number of hydrophilic monomers are introduced into a traditional wet bonding technique, cured resin can be easily degraded by esterase in saliva as the water absorption rate is increased remarkably.

The invention discloses a dual-curing dental composite resin, and belongs to the technical field of dental prosthetic materials. The dental composite resin is packaged in two doses; the component 1 comprises an acrylics monomer, an inorganic filler and an oxidizing agent; the component 2 comprises an acrylics monomer, an inorganic filler and a reducing agent; a UV-curable initiator and a dye exist in the component 1 and/or the component 2. The traditional peroxide-tertiary amine system is replaced with a novel oxidation-reduction initiator system and a diacetyl acetone copper-thiourea system, so that anthochromia caused by the initiator after the resin is cured can be significantly weakened.

A photopolymerization initiator comprising (A) an α-diketone compound such as camphorquinone, (B1) an aliphatic amine compound such as triethanolamine or N-methyldiethanolamine, (B2) an aromatic amine compound such as ethyl p-dimethylaminobenzoate or N,N-dimethyl p-toluidine, and (C) a triazine compound substituted with a trihalomethyl group, such as 2,4,6-tris(trichloromethyl)-s-triazine or 2-phenyl-4,6-bis(trichloromethyl)-s-triazine. The photopolymerization initiator remains stable against the environmental light such as the indoor illumination light from a fluorescent lamp or the dental light illuminating the interior of the oral cavity, is excellently handled, is quickly cured by the irradiation with an intense light emitted from a light irradiator for polymerization, provides a cured body having excellent properties, can be stably preserved even at high temperatures, and is very useful as a dental composite resin.

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.

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 is adopted 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 in dark 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.

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.

The invention discloses a low shrinkage light-cured composite resin for dental restoration and a preparation method thereof. With multifunctional structural advantages, cage-like silsesquioxane can cooperate with an expansion monomer, resin matrix, silanized silica and other components to form a three-dimensional network structure during polymerization so as to reach the purposes of lowering polymerization shrinkage of the material and improving mechanical properties, etc. The preparation method consists of: stirring the components evenly to obtain uncured composite resin, then conducting ultrasonic dispersion, vacuum debubbling, pouring into a mold, visible light curing and other steps, thus obtaining the low shrinkage dental composite resin. The used cage-like silsesquioxane and spiro ortho expansion monomer are both liquid, and have good compatibility with composite resin, and a good dispersion effect can be achieved without introducing a solvent, the added cage-like silsesquioxane provides a network crosslinking point for the system, while the polymerization shrinkage of the composite resin is reduced, the mechanical properties of the material are improved, and the water absorption and solubility are reduced.

The invention relates to a rambutan-like SiO2-based dental composite resin and a preparation method thereof. The composite resin comprises inorganic filler, a resin matrix and an initiator system, wherein the inorganic filler is rambutan-like SiO2. The preparation method comprises the following steps: mixing the rambutan-like SiO2, the resin matrix and the initiator system to obtain an uncured composite resin paste, and then performing light curing to obtain the dental composite resin. The dental composite resin provided by the invention has simple preparation and excellent performances, and the surface of the rambutan-like SiO2 has a convex structure similar to sawtooth; by the mutual occlusion between the sawtooth, the frictional force between SiO2 particles is improved, and the materialfracture due to relative slippage of particles is reduced; in addition, by utilizing the rough structure of the surface of SiO2, the contact area between the resin matrix and SiO2 is increased, the bonding ability of the organic-inorganic phase interface is improved, and thus the mechanical properties of the composite resin are improved.

Disclosed are photopolymerizable compositions suitable for uses such as dental composite resins, and that comprise (A) a radical-polymerizable monomer, (B) a photopolymerization initiator that comprises (B1) an α-diketone compound, (B2) a photoacid generating agent, (B3) an aromatic amine compound, and (C) an organic filler containing a phthalate ester fluorescent agent.

The invention relates to mesoporous material-base antibacterial composite resin for the dental department and a preparation method thereof. Raw materials comprise inorganic filling, organic monomers and a light initiator, and the inorganic filling is an antibacterial agent@mesoporous material. The preparation method includes the steps that the antibacterial agent@mesoporous material, the organic monomers and the light initiator are pre-mixed and then put into a three-roll grinding machine to be further mixed, and non-solidified composite resin paste is obtained through vacuum negative-pressuretreatment; finally, through solidifying of visible light, the composite resin for the dental department is obtained. The preparation method of the composite resin for the dental department is easy and convenient to implement, and the prepared composite resin for the dental department has an excellent antibacterial property and an excellent mechanical property, and has good application prospects.

The invention relates to a method for preparing dental fortified resin based on the principle of material hybridization modification, belonging to the field of medical and dental preparation. The wear-resisting property and the obdurability of the existing composite dental resin used for filling tooth cavities are in urgent need to be improved, and the invention aims at promoting the technological progress of the resin. The method includes the steps: carrying out the operation of surface modification to inorganic nano-sized powder under the utilization of silane coupling agent; uniformly mixing the modified inorganic nano-sized powder with monomer, such as bisphenol A methyl glycidyl acrylate, diluting agent, such as triethylene-glycol dimethacrylate, light trigger, such as camphorquinone, coinitiator, such as dimethylaminoethyl methacrylate, and other materials under photophobic conditions; and eliminating air bubbles under vacuum condition. The invention is characterized in that the interior of the inorganic nano-sized powder contains aluminium oxide nano rods which are 10 to 80 percent of the weight of the inorganic nano-sized powder. The aluminium oxide nano rods added inside contribute to the improvement of the wear-resisting property and the obdurability of the materials.

The invention relates to a fluoridated dental composite resin material contributing to resisting secondary caries, and belongs to the field of dental preparations. The conventional simple villiaumite-blended composite resin caries-filling material has the problems of too quick fluorine release, poor interfacial compatibility and no rigid support for a caries-filling body, and the scheme aims to solve the problems. The fluoridated dental composite resin material 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 bisphenol A glycidyl methacrylate resin monomer, 5 to 25 percent of triethylene-glycol dimethacrylate diluent, 0.25 to 2 percent of camphorquinone photoinitiator, and 0.5 to 3 percent of dimethylamino ethyl methacrylate coinitiator; and importantly, the nano inorganic powder comprises 10 to 80 weight percent of fluorine-carrying mesoporous silica microspheres which can slowly release fluorine and strengthen the composite resin.

The invention relates to a dental composite resin material containing telechelic oligomer pertains to the technical field of dental materials for dental repair or reconstruction. The dental composite resin material is composed of telechelic oligomer, methacrylate monomer, initiator, dye and inorganic filler, the trade name of the telechelic oligomer is XMAPt-MM100C, XMAPt-MM110C, XMAPt - RC100C and XMAPt-RC200C. The inorganic filler contains CaO-SiO2-Al2O3-P2O5-F fluorine-based silicate biological ceramic powder. The dental composite resin material of the invention is the dental material which has biological activity and can be light-cured or self-cured; as the telechelic oligomer is added, the using amount of the inorganic filler is increased, the invention has very low volume shrinkage ratio, the volume shrinkage ratio is lower than the similar products by more than 40 percent; and the cost of the materials is also reduced.

An abrading dental floss is characterized by dental floss formed of a circular fiber or fibrous material having a dental abrasive on the exterior portion thereof suitable for polishing, sanding and/or finishing (abrading) dental restorative material particularly dental composite resin. The dental abrading material is impregnated into or provided onto the dental floss. In one form, the dental abrading floss has an abrading section situated between lengths of non-abrading dental floss. The abrading section may be formed of an alternating pattern of non-abrasive portions and abrasive portions along a length of the floss. The abrasive portions may be of a single grit or texture of the dental abrasive or may be of different grits of the dental abrasive. In another form, the dental abrading floss has a single grit of a dental abrasive along and about its entire length. The dental abrasive may be of a single grit or different grits of the dental abrasive along its length. For different grits of the dental abrasive, it is preferred, but not necessary, that they gradually change in grit size.

The invention discloses composite resin with low contraction stress containing dimethacrylate with a long oxyalkyl chain for the dental department and a preparation method of the composite resin. Thecomposite resin comprises 20-50 weight parts of a mixture containing methacrylate resin matrix and a light initiating system, and 50-80 weight parts of an inorganic filler. In the mixture containing the methacrylate resin matrix and the light initiating system, the weight of the methacrylate resin matrix accounts for 96%-99.4% of that of the mixture, and the weight of the light initiating system accounts for 0.6%-4% of that of the mixture. The composite resin with low contraction stress containing dimethacrylate with the long oxyalkyl chain for the dental department has relatively low system contraction rate and contraction stress, and the phenomenon of repair failure caused by marginal microleakage, repairing body falling and the like due to polymerization contraction and contraction stress when the composite resin is used for repairing the dental cavity can be reduced.

The invention relates to a high-strength dental composite resin and a preparation method thereof. Raw materials of the composite resin comprises inorganic filler, organic monomers and a photoinitiator, and the inorganic filler is co-filler composed of spherical mesoporous filler and spherical filler. The preparation method comprises the steps that the spherical mesoporous filler, the organic monomers and the photoinitiator are pre-mixed and put into a three-roller grinder to be further mixed, the spherical filler is added, and a composite resin plaster which is not cured is obtained after vacuum negative pressure treatment is conducted; the dental composite resin is finally obtained after visible light curing. The dental composite resin has the advantages that the preparation method is simple and convenient, the mechanical performance is excellent, and the resin has better application prospects.

The invention belongs to the biomedical high molecular material technical field, in particular to a preparation method and the application of dental composite resin which contains functional monomer PMDM and modified hydroxyapatite. The preparation method includes the steps: 5%-20% of functional monomer PMDM is added to the substrate resin and placed in a constant-temperature oven; under the temperature of 40 DEG C -80 DEG C, the PMDM is dissolved in the substrate resin and stirred evenly; then photosensitizer and organic amine activator are added to the substrate resin and stirred evenly; then modified inorganic filler is added and diluted in solvent; the amount of solvent is 5%-10% of the mass of the mixture; the mass fraction of inorganic filler is 20%-70% of the total mass; inorganic filler is stirred evenly; the mixture is placed in a vacuum oven and placed under 40 DEG C-80 DEG C for 2-4 hours; the composite resin paste is obtained after the solvent is volatilized completely and the air bubbles are eliminated. The oral cavity repair resin has the advantages of good bond performance, ultrastructure, higher mechanical intensity, higher biocompatibility, having wide application prospect in the oral cavity repair field, having reasonable preparation line, obtainable raw materials, lower price, simple preparation process, having important popularization and application values.

The invention relates to a dental composite-resin high-strength fiber periodontal bundle band, which is prepared by the following steps of adopting poly p-phenylene benzobisoxazole (PBO) reinforced fibers subjected to surface modification and micromorphology treatment as a reinforcement phase, adopting toughened resin subjected to nano-modification as a matrix, and mixing the PBO reinforced fibers and the toughened resin to form a composite material so as to prepare the periodontal bundle band. According to the dental composite-resin high-strength fiber periodontal bundle band provided by the invention, the problems that an existing periodontal fiber bundle band is insufficient in bending strength, modulus of elasticity in static bending, toughness and other mechanical properties are solved, and the high-performance PBO fiber and a three-dimensional braided structure are introduced into a periodontal bundle band material, so that the overall mechanical strength of the fiber bundle band is improved.

The invention relates to a preparation method of betulin-based antibacterial dental composite resin. The preparation method comprises the following steps that (1) monosubstituted and disubstituted methacrylate betulin derivatives are prepared; and (2) the prepared betulin derivative are added into a traditional resin matrix, uniform mixing is carried out through a double-core dispersion machine toobtain uncured resin paste, and finally curing is carried out through visible light to obtain the dental restoration resin. The preparation method of the betulin-based antibacterial dental compositeresin is simple and convenient, and the betulin-based antibacterial dental composite resin has polymerization capacity. Compared with a traditional resin matrix, the composite resin prepared from an antibacterial organic monomer has the advantages that the mechanical property is not influenced, and meanwhile, obvious biocompatibility and antibacterial activity are shown.