34 results about "Dental resins" patented technology

The invention discloses a cross-linked polyquaternary ammonium salt type antibiosis monomer, a preparation method of the cross-linked polyquaternary ammonium salt type antibiosis monomer and application of the cross-linked polyquaternary ammonium salt type antibiosis monomer in dentistry repairing materials. In the preparation method, monomer bonds are connected to a dentistry resin-based material, so as to endow antibiosis property to the resin-based material. The structure general formula of the cross-linked polyquaternary ammonium salt type antibiosis monomer is shown in the specification. The preparation method comprises the following steps: 1, adding a solvent in tertiary amine substance, and adding halohydrocarbon substance for reflux reaction so as to obtain a product A, adding acyl chloride for reflux reaction by using toluene, benzene, dichloromethane or tetrahydrofuran so as to obtain quaternary ammonium salt B, and purifying the quaternary ammonium salt B; and 2, adding the acyl chloride and tertiary amine substancem by using the toluene, benzene, dichloromethane or tetrahydrofuran as the solvent, adding triethylamine as auxiliary, reacting to obtain the tertiary amine containing C=C, the tertiary amine takes acetone, metjylene dichloride and acetonitrile as the solvents, adding the halohydrocarbon for reflux reaction, and then purifying the quaternary ammonium salt monomer. In the invention, reaction steps are simple, the purity of the monomer is high, and the monomer has better compatibility and higher safety as compared with the common dentistry repairing resin monomer.

Present embodiments include composite dental materials for use in fillings and crowns, and methods of making the same. The composite materials can include biocompatible dental resin matrices and filler materials. The filler materials can include various types of magnetic nanoparticles. Additional embodiments include method of forming composite dental materials using a magnetic field and methods for forming aluminum oxide (Al₂O₃) nanoparticles. Other embodiments according to present teachings include methods for filling dental cavities and forming dental crowns.

The invention relates to a hyperbranched monomer-modified oral repair material, and a modification method and application thereof, in particular to a hyperbranched monomer applied to an oral low-shrinkage repair material. A hyperbranched monomer-modified resin monomer is applied to a dental resin-based material so as to endow the dental resin-based material with low shrinkage. The structural formula of the hyperbranched monomer-modified oral repair material is as shown in the description. In the formula, any of a hyperbranched monomer adopts pentaerythritol as a central core and 2,2-dimethylol propionic acid as a branching unit to synthesize a second-generation Boltorn-type hyperbranched monomer, and then the terminal hydroxyl of the second-generation Boltorn-type hyperbranched monomer is subjected to varying degrees of substitution by maleic anhydride, acyl chloride or quaternary ammonium salt to obtain various hyperbranched monomers for modifying a conventional dental repair resin system.

The invention belongs to the technical field of modification of dental resin materials, and provides high-strength antibacterial composite resin for dental restoration and a preparation method thereoffor solving the problems of stress fracture and secondary caries during the service of composite resin. The composite resin consists of inorganic filler and a resin matrix by adding an initiator, andthe inorganic filler is zinc-doped mesoporous silica beads; the resin matrix consists of a main monomer bisphenol A-glycidyl methacrylate and a diluents triethylene glycol dimethacrylate; and the initiator consists of a main initiator camphorquinone and an auxiliary initiator ethyl 4-N,N-dimethylaminobenzoate. The antibacterial properties of dental resin can be given by utilizing a mesoporous material to antibacterial components; the mechanical strength of the dental resin can be enhanced through the mechanical interlocking at the interface part of the mesoporous channels of the inorganic filler and the dental resin; the inorganic filler is non-toxic in components and high in safety; and the used inorganic filler can be prepared through a one-step reaction method, so that the composite resin and preparation method thereof are simple and easy in operate and very easy to promote.

Various embodiments of the present invention generally relate to a light-cure and dual-cure resin that have low color and is color stable over conventional light, self and dual-cured resins. Additionally, the light-cure resin has enhanced degree of cure over conventional light-cure resins. Finally, due to the low color and enhanced color stability of the dual-cure resins, their inherent property of having lower shrinkage stress as compared to light-cure resins can now be utilized in various dental applications and other resin applications.

The invention discloses a dental resin monomer containing fluorine ions. The structural formula is shown as formula (I). The invention also discloses a preparation method for the dental resin monomer containing fluorine ions and application thereof in preparing dental resin in which fluorine ions can be repeatedly charged and discharged. The dental resin which is prepared from the dental resin monomer containing fluorine ions provided by the invention as a fluorine-containing monomer can realize the long-acting slow release and repeated filling and release of fluorine ions, the forming of decayed tooth can be effectively prevented and the antibacterial property is excellent. In the formula, R is selected from alkyl groups with carbon number from 1 to 18 and Q is selected from the formula as shown in the description.

The invention discloses a composite dental resin material containing macropore molecular sieves, and belongs to the technical field of dental repair materials. Dental resins are prepared from acrylic monomers, initiators, inorganic fillers and dyes; in the inorganic fillers, the macropore molecular sieves, of which the average apertures are not less than 7nm and the using amount accounts for 5-85 percent of the inorganic fillers, are introduced. According to the composite dental resin material containing macropore molecular sieves, the macropore molecular sieves are introduced and used as fillers, so that molecular monomers enter the molecular sieve holes in advance; and after polymerization, an inorganic-organic interpenetrating network is formed by the molecular sieves and a resin basal body, or the molecular sieves and the resin basal body are embedded into the molecular sieve holes, so that the molecular sieves are fixed in a resin network, thereby obviously improving the binding force between the resin basal body and the fillers and reducing the abrasion value of the materials.

The invention discloses a cleaning device and cleaning method for an oral probe. The cleaning device comprises a barrel internally provided with a cleaning cavity, a first pipe and a second pipe arranged on the barrel communicate with the cleaning cavity through a first flow channel and a second flow channel respectively, and a clamping mechanism is arranged at the open end of the cleaning cavity;and a control mechanism is arranged in a sliding groove formed in the barrel and used for mounting a dental probe and controlling the cleaning device to be switched to a working state or a cleaning state, the clamping mechanism seals the open end of the cleaning cavity in the cleaning state, external fluid enters the cleaning cavity to flush the working end of the dental probe, and the flushed fluid is drained out of the cleaning cavity. In the examination process, the dental probe can be cleaned in the oral cavity or near the oral cavity, so that the probe does not need to leave the oral cavity to move to a workbench in the examination process, the examination efficiency is remarkably improved, and the dental probe can help to keep the dental surface clean and dry when oral operations such as dental resin filling, root canal treatment and orthodontic bracket bonding are performed; and pollution by saliva and waste liquid is avoided and the operation difficulty of doctors is reduced.

An object of the present invention is to provide a dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes it difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability. The dental resin-reinforced glass ionomer cement composition consisting of a powder material and a liquid material, wherein the powder material contains (a) acid-reactive glass powder, the liquid material contains (b) water, (c) polymer of acidic group-containing polymerizable monomer, (d) hydroxyl group-containing (meth)acrylate-based polymerizable monomer and (e) tri or more functional (meth)acrylamide-based polymerizable monomer, and at least one of the powder material and the liquid material contains (f) polymerization initiator.

Antimicrobial azo compounds include azobenzene monomers having a phenyl ring comprising a hydroxyl substituent group. The azobenzene monomers can be reacted with a polymeric material to form an antimicrobial coating that prevents growth of persistent biofilms. In some implementations, the azobenzene monomers can be used to coat the surface of a dental resin-based composite to prevent the formation secondary caries. In some implementations, the azobenzene coating can be used to disperse microbial biofilms through a photofluidization process (rapid photoisomerization) in addition to biochemically preventing formation of the microbial biofilm.

The invention discloses a method for preventing formation of white spots on a tooth body. Before orthodontic correction and placement of an orthodontic brace or adhesion of an orthodontic bracket, a related tooth enamel structure on the surface of the tooth body is sealed and cured by a polymerizable dental resin material, a polymerization film is formed on the surface of tooth enamel, the tooth enamel structure covered by the polymerization film is completely separated and isolated from dental plaque and harmful factors thereof, which may be generated on the tooth enamel structure in the future, so as to avoid demineralization under the action of the dental plaque and harmful factors thereof, and accordingly, white spots of teeth are prevented and stopped. By the method, white spots or points on tooth surfaces can be prevented and stopped from the source during orthodontic correction. Compared with common passive treatment methods in which the white spots of teeth that form after orthodontic correction are treated after formation, the method has the advantages that the effects of time saving, improved efficiency and economy are really achieved, and the satisfaction degree of persons, who have orthodontic treatment, after orthodontic correction is improved.

The invention discloses low-surface-energy hydrophobic dental resin and a preparation method thereof. According to the preparation method, a fluorine-containing (meth)acrylate prepolymer is prepared from fluorine dihydric alcohol, diisocyanate and (meth)acrylic acid isocyanate ethyl ester through two-step reaction; and then photo-initiation polymerization is conducted on the fluorine-containing (meth)acrylate prepolymer, a low-viscosity (meth)acrylate reactive diluent, a photoinitiator and an accelerant to prepare the low-surface-energy hydrophobic dental resin. Compared with dental resin matrix which is commercially used at present, the dental resin matrix disclosed by the invention has lower surface energy and higher hydrophobicity, and can effectively reduce microleakage and adhesion of bacteria on the surface of the dental resin matrix, so the aim of reducing the incidence rate of secondary caries is fulfilled.

Polymerizable compositions comprising a redox initiator system is disclosed. The redox initiator system comprises a photolabile transition metal complex that photolyzes and initiates the redox cycle.Dental compositions comprising dental resins and the photolabile redox initiator system are also described.

The invention provides a bio-based antibacterial dental restoration material with high biocompatibility and a preparation method thereof. The bio-based antibacterial dental restoration material is prepared by using 5', 5-diallyl-2, 2'-biphenol and pentaerythritol tetramercaptoacetate as reactants, tetravinylsilane as a filler and 2-isopropyl thioxanthone as a catalyst through addition polymerization, wherein tetravinylsilane is used for replacing a traditional silicon dioxide filler, addition polymerization is carried out on tetravinylsilane and pentaerythritol tetramercaptoacetate, so that organic thermosetting resin and the filler are combined in a chemical bond mode, the hardness and abrasion resistance of the material can be improved, and the material is good in mechanical property and stable in quality. The dental restoration material prepared by using 5', 5-diallyl-2, 2'-biphenol as a raw material has a long-acting antibacterial effect, and the service life of the dental restoration material is prolonged; and moreover, the material has high biocompatibility, and the risk that other chemically synthesized light-cured dental resin materials remain in a human body for a long time to generate toxicity is solved.

An object of the present invention is to provide a two-paste type dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability. The two-paste type dental resin-reinforced glass ionomer cement composition of the present invention consists of two pastes, wherein at least one of the two pastes contains (a) acid-reactive glass powder, (b) polymer of acidic group-containing polymerizable monomer, (c) water, (d) hydroxyl group-containing (meth)acrylate-based polymerizable monomer, (e) tri or more functional (meth)acrylamide-based polymerizable monomer, and (f) polymerization initiator, wherein the paste containing the (c) water does not contain at least one of the (a) acid-reactive glass powder and the (b) polymer of acidic group-containing polymerizable monomer.

Polymerizable compositions comprising a redox initiator system is disclosed. The redox initiators comprise a photolabile reducing agent, that photolyzes and initiates the redox cycle. Dental compositions comprising dental resins and the photolabile redox initiator system are also described.