Abstract

The present invention relates to a dental curable composition containing a (meth)acrylic based monomer (A) containing two or more (meth)acryloyloxy groups and one or more urethane bond in one molecule, a (meth)acrylate ester compound (B) containing two or more (meth)acryloyloxy groups and one or more hydroxy group in one molecule, a polymerization initiator (C), and an ion releasing compound (D); a dental filling and restorative material containing the dental curable composition; a dental cement containing the dental curable composition; and a dental abutment building material containing the dental curable composition.

IPC Classes  ?

• A61K 6/891 - Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/71 - Fillers

Abstract

The present invention relates to a dental curable composition containing a (meth)acrylic based compound (A) having two or more (meth)acryloyl groups in one molecule, a particular mono(meth)acrylate ester compound (B), a chemical polymerization initiator (C), a polymerization accelerator (D), and a filler (E), being separately packaged in a first material containing the chemical polymerization initiator (C) and a second material containing the polymerization accelerator (D); a dental filling and restorative material containing the dental curable composition; a dental cement containing the dental curable composition; and a dental abutment building material containing the dental curable composition.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/61 - Cationic, anionic or redox initiators
• A61K 6/77 - Glass

Abstract

The present invention provides a zirconia sintered body and a method of production thereof that exhibit excellent flexural strength, fracture toughness, and translucency according to the yttria content. The present invention relates to a zirconia sintered body comprising zirconia particles, and satisfying A15/A50<0.60 (wherein A15 represents the particle diameter of when the cumulative area of zirconia particles reaches 15% of the total area, and A50 represents the particle diameter of when the cumulative area of zirconia particles reaches 50% of the total area in a SEM photograph of the zirconia sintered body when the area of each zirconia particle is calculated and the calculated areas are accumulated in sequence from particles with smaller areas, where the total area represents the sum of the areas of the zirconia particles in the SEM photograph).

IPC Classes  ?

• C04B 35/486 - Fine ceramics
• C04B 35/64 - Burning or sintering processes

Abstract

The present invention provides a zirconia composition that exhibits excellent translucency in its sintered body and that enables the mitigation of opalescent properties in the sintered body. The invention also provides a zirconia pre-sintered body and zirconia sintered body therefrom, along with methods that enable easy production of these. The present invention relates to a zirconia composition comprising a zirconia particle, and a stabilizer particle capable of preventing a phase transformation of zirconia, wherein: the zirconia has an average particle diameter (r1) of 1 to 60 nm, the stabilizer has an average particle diameter (r2) of 1 to 60 nm, and the half width of a peak derived from the stabilizer in a powder X-ray diffraction pattern by CuKα radiation is 0.05° to 1.0°. Using the zirconia composition allows the zirconia sintered body to exhibit reduced regularity in its structure, mitigating wavelength-selective reflection and/or transmission, resulting in reduced opalescent properties. This leads to the production of a zirconia sintered body that exhibits excellent translucency and low opalescent properties.

IPC Classes  ?

• C04B 35/488 - Composites
• C04B 35/64 - Burning or sintering processes

Abstract

The present invention provides a curable composition for dental use, which has ion release properties and aesthetic properties and is excellent in terms of mechanical strength and dentine strengthening ability. The present invention pertains to a curable composition for dental use, which contains a glass (A), a polymerizable monomer (B), and a polymerization initiator (C), wherein the glass (A) contains strontium, zinc, boron, and fluorine, the content of strontium is 8-33 mass%, the content of zinc is 2.0-25 mass%, the content of boron is 1.0-11 mass%, the content of fluorine is 9-35 mass%, and the content of sodium is 0-0.5 mass% when the contents are expressed in mass% in terms of the contents of the respective constituent elements with respect to the whole mass of the glass (A).

IPC Classes  ?

• A61K 6/836 - Glass
• A61K 6/62 - Photochemical radical initiators
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides an oxide ceramic pre-sintered body for dental use and a method of production thereof having excellent machinability with a low probability of chipping while exhibiting high translucency after sintering. The present invention relates to an oxide ceramic pre-sintered body for dental use comprising oxide ceramic particles with an average primary particle diameter of 50 to 300 nm, and pores, and having a D10 of 20 nm or more and a D90 of 90 nm or less in a cumulative distribution of pores within the pre-sintered body. The oxide ceramic pre-sintered body for dental use has a relative density of preferably 43 to 63%. The oxide ceramic pre-sintered body for dental use has a BET specific surface area of preferably 5 to 25 m2/g as measured in compliance with JIS Z 8830:2013.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61K 6/17 - Particle size
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide

Abstract

The purpose of the present invention is to make it possible to further reduce the risk of fracture of a part to be processed, while maintaining appropriate adhesive force between the part to be processed and a holding part.　A mill blank assembly (10) has a part to be processed (20), a holding part (30) for holding the part to be processed (20), and an adhesive layer (40). The adhesive layer (40) is disposed between a first adhesive surface (21) and a second adhesive surface (33), which are adhesive surfaces of the part to be processed (20) and the holding part (30), and bonds the part to be processed (20) and the holding part (30). The second adhesive surface (33) of the holding part (30) has an uneven structure (36) including a convex part (34) and a concave part (35), and the convex part (35) and the concave part (36) are not fitted to each other.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• A61C 13/083 - Porcelain or ceramic teeth

Abstract

Provided is a mill blank assembly which relaxes vibration generated during processing in a CAD/CAM processing machine and is excellent in processing accuracy. The present invention pertains to the mill blank assembly that includes a part to be processed, a holding part, and an adhesive composition, satisfying the following conditions [1] and/or [2]: [1] The loss coefficient tanδ at 20°C in a very micro-indentation test (nanoindenter) of a cured product of the adhesive composition is 0.70 or less; and [2] The ratio (X1/Y1) of the peel adhesive strength (X1) and the fracture strain (Y1) in the compression-shear adhesion test between the part to be processed and the holding part at 20°C is 1,200 N/mm or less.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• A61C 13/083 - Porcelain or ceramic teeth

Abstract

The present invention provides a dental curable composition that exhibits excellent mechanical strength in its cured product, and possesses high paste flowability and sufficient formability, previously deemed conflicting paste properties. The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), and a polymerization initiator (C), wherein: the polymerizable monomer (A) comprises 0 parts or more by mass and less than 15 parts by mass of a hydrophilic polymerizable monomer (A-1a) having no acidic group, and 55 parts or more by mass of a hydrophobic polymerizable monomer (A-1b) having no acidic group in total 100 parts by mass of the polymerizable monomer (A), and the hydrophilic polymerizable monomer (A-1a) having no acidic group has a solubility of 4.5 g/L or more in water at 25° C., the filler (B) comprises 1 to 60 parts by mass of a spherical filler (B-1) having an average particle diameter of 0.01 to 1 μm, 40 to 99 parts by mass of an irregularly shaped filler (B-2) having an average particle diameter of 0.5 to 6.0 μm, and 0 to 10 parts by mass of an irregularly shaped fine particulate filler (B-3) having an average particle diameter of less than 0.5 μm in total 100 parts by mass of the filler (B), and the spherical filler (B-1) is hydrophobized with a hydrophobizing agent (x-1), and the polymerization initiator (C) comprises a photopolymerization initiator (C-1).

IPC Classes  ?

• A61K 6/17 - Particle size
• A61K 6/62 - Photochemical radical initiators
• A61K 6/896 - Polyorganosilicon compounds

Abstract

The present invention provides a dental composition that exhibits excellent storage stability even under severe conditions, and shows sufficient mechanical strength in its cured product. The invention also provides a method of production of such dental compositions, and surface-treated fillers for dental use. The present invention relates to a dental composition comprising a polymerizable monomer (A), a polymerization initiator (B), and a filler (C), wherein the filler (C) comprises a surface-treated filler for dental use (C-1) surface-treated with a silane coupling agent (a) having a polymerizable group, and an end capping agent (b), and the surface-treated filler for dental use (C-1) shows a dissolution rate of less than 100 ppm for metallic components in an acid resistance test.

IPC Classes  ?

• A61K 6/896 - Polyorganosilicon compounds
• A61K 6/78 - Pigments

Abstract

Provided is a dental composition kit having a high mineral density recovery ability. The dental composition kit comprises an A liquid and a B liquid. The A liquid contains calcium ions (a1) and water (b1). The B liquid contains a compound (c) represented by formula (I) and having an acidic group: formula (I): R1kk, wherein in formula (I), R1 represents an organic group that has 40 or less carbon atoms and may or may not have at least one (meth) acryloyloxy group; X represents an acidic group; k represents an integer of 1 or 2; and when k is 2, the two acidic groups X are the same or different from each other; zinc ions (d1) and water (b2), and substantially does not contain a crosslinkable polymerizable monomer.

IPC Classes  ?

• A61K 6/20 - Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
• A61K 8/19 - Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
• A61K 8/27 - ZincCompounds thereof
• A61K 8/55 - Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing phosphorus
• A61Q 11/00 - Preparations for care of the teeth, of the oral cavity or of dentures, e.g. dentifrices or toothpastesMouth rinses

Abstract

In order to provide a static mixer and a paste injector with which it is possible to adjust, with a simple structure, the pushing force of a plunger while preventing air bubbles from being mixed into a dental material being discharged, a static mixer (7) includes: a plurality of paste passages (29, 29') that are disposed side by side on a circumference centered on a central axis (CA) of a syringe (3), and that extend in a longitudinal direction (X); an intermediate passage (31); and a mixing passage (33) that extends centered on the central axis (CA). The inner circumferential surface of each of the plurality of paste passages (29, 29') has a tapered portion formed in a tapered shape approaching the central axis (CA) toward outflow holes (29B, 29B') from inflow holes (29A, 29A') in distal surfaces (29C, 29C'), and the opening area of the inflow holes (29A, 29A') is greater than the opening area of the outflow holes (29B, 29B').

IPC Classes  ?

• B01F 25/432 - Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flowsCross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
• A61C 5/64 - Applicators, e.g. syringes or guns for multi-component compositions
• B01F 23/50 - Mixing liquids with solids
• B01F 23/60 - Mixing solids with solids
• B01F 35/53 - Mixing receptacles characterised by the configuration of the interior, e.g. baffles for facilitating the mixing of components
• B01F 35/71 - Feed mechanisms
• B01F 101/19 - Mixing dentistry compositions

Abstract

The present invention provides a dental polymerizable composition which is excellent in terms of toughness and water resistance of a cured product, and a cured product of which has little eluate. The present invention relates to a dental polymerizable composition which contains a polyfunctional (meth)acrylic polymerizable compound (A) and a photopolymerization initiator (B) that does not contain a phosphine oxide skeleton. It is preferable that the photopolymerization initiator (B) that does not contain a phosphine oxide skeleton contains a Norrish type II photopolymerization initiator. It is preferable that the polyfunctional (meth)acrylic polymerizable compound (A) contains a polyfunctional (meth)acrylic polymerizable compound (A)-I that has a molecular weight of less than 1000 and/or a polyfunctional (meth)acrylic polymerizable compound (A)-II that has a molecular weight of 1,000 or more.

IPC Classes  ?

• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/62 - Photochemical radical initiators
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08F 290/06 - Polymers provided for in subclass

Abstract

The present invention provides a paste injector that makes it possible to specify a relative position between a syringe and a mounted member to a prescribed position. To this end, provided is a paste injector comprising a mounted member (M) that is removably mounted on a syringe (3) which has discharge ports (51, 51') formed therein, wherein: the mounted member (M) includes a cylindrical outer body (OM) into which the syringe (3) is inserted and which is rotatable around a center axis (CA) and an interior member (IM) which is disposed inside the outer body (OM); the syringe (3) is inserted into the outer body (OM) along the center axis (CA), and the outer body (OM) is fixed to the syringe (3) via an engagement structure in which engagement is achieved through rotation around the center axis (CA); the engagement structure has three or more engagement sets of an engaging part (45) which is formed in the syringe (3) and an engagement-receiving part (107) which is formed in the outer body (OM) and which can be engaged with the engaging part (45); and the three or more engagement sets are arranged along the rotation direction of the outer body (OM) and are non-symmetrical about the center axis (CA) when view along the center axis (CA).

IPC Classes  ?

• A61C 5/64 - Applicators, e.g. syringes or guns for multi-component compositions

Abstract

The present invention provides a curable dental composition which exhibits sufficient fluidity with which to suppress floating of a prosthesis at the time of cementing and which exhibits excellent excess cement removal properties at the time of preliminary irradiation. The present invention relates to a curable dental composition which contains a polymerizable monomer (A), a filler (B), a polymerization initiator (C), a polymerization accelerator (D) and a rheology modifier (E). The polymerization initiator (C) includes a photopolymerization initiator (C-1). The viscosity V1 at an initial shearing rate D1 (0.01 s-1), which is determined by measuring the viscosity with a rotating rheometer over time for a total of 3 minutes, namely 1 minute at the shearing rate D1 (0.01 s-1), 1 minute at a shearing rate D2 (10 s-1) and another 1 minute at the shearing rate D1, is not less than 10,000 Pa·s and less than 20,000 Pa·s. The viscosity V2 at the shearing rate D2 (10 s-1) is 100 Pa·s or less. The time T required for the viscosity V3 to reach 10,000 Pa·s after the shearing rate is switched from D2 to D1 again is less than 40 seconds after the shearing rate is switched from D2 to D1.

IPC Classes  ?

• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/62 - Photochemical radical initiators
• A61K 6/76 - Fillers comprising silicon-containing compounds
• A61K 6/77 - Glass

Abstract

The present invention provides a stereolithographic article adhesive composition having excellent adhesiveness with respect to a shaped article produced by stereolithography. The present invention relates to a stereolithographic article adhesive composition comprising a multifunctional (meth)acrylic-based polymerizable monomer (A) and a photopolymerization initiator (B). The multifunctional (meth)acrylic-based polymerizable monomer (A) preferably contains at least one of a urethanated (meth)acrylic acid ester compound (a-1), an aromatic compound-based (meth)acrylic acid ester compound (a-2) containing no urethane bond, and a (meth)acrylamide group-containing polymerizable monomer (a-3).

IPC Classes  ?

• C09J 4/00 - Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond
• A61K 6/35 - Preparations for stabilising dentures in the mouth
• A61K 6/79 - Initiators
• C08L 33/24 - Homopolymers or copolymers of amides or imides

Abstract

The present invention provides a stereolithographic resin composition from which a shaped article having excellent strength, toughness, water resistance, and impact resistance is obtained. The present invention pertains to a stereolithographic resin composition containing: a polyfunctional (meth)acrylic polymerizable compound (A) having a molecular weight of less than 1,000; a polyfunctional (meth)acrylic polymerizable compound (B) having a molecular weight of at least 1,000; a monofunctional (meth)acrylic polymerizable compound (C) that does not contain a hydroxyl group and contains a cyclic ether structure; and a photopolymerization initiator (D).

IPC Classes  ?

• C08F 290/06 - Polymers provided for in subclass
• A61C 13/15 - Curing devices for plastics prostheses for curing by the action of light
• B29C 64/135 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
• B29C 64/314 - Preparation
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing

Abstract

The present invention provides a method of producing an intraoral appliance equipped with a coated film including an intraoral appliance that is a stereolithographic article of a stereolithographic curable composition having formed on a prescribed surface thereof a coated film capable of imparting excellent adhesion durability and toughness, and relates to a method of producing an intraoral appliance equipped with a coated film, including coating on a prescribed surface of an intraoral appliance that is a stereolithographic article of a stereolithographic curable composition (A) containing a (meth)acrylic based polymerizable monomer (a) and a photopolymerization initiator (b), a curable composition (B) containing the same (meth)acrylic based polymerizable monomer (a) as contained in the stereolithographic curable composition (A), so as to form a coated film of a resin (B1) containing a polymer having a structure derived from the same (meth)acrylic based polymerizable monomer (a) as contained in the stereolithographic curable composition (A), on the prescribed surface of the intraoral appliance.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/01 - Bases
• A61K 6/62 - Photochemical radical initiators
• A61K 6/889 - Polycarboxylate cementsGlass ionomer cements
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
• B33Y 80/00 - Products made by additive manufacturing

Abstract

The present invention relates to a method of producing a denture, including adhering a denture base that is a stereolithographic article of a curable composition (I) containing a (meth)acrylic based polymerizable monomer component (A) containing a (meth)acrylic based polymerizable monomer (m) as a major monomer, and a photopolymerization initiator, and a prosthetic tooth containing an acrylic based resin (II), with an adhesive composition containing a composition (III) containing a (meth)acrylic based polymerizable monomer component (C) containing the same (meth)acrylic based polymerizable monomer (m) as contained in the curable composition (I).

IPC Classes  ?

• A61C 13/01 - Bases
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides a dental adhesive kit whereby a separate-pack type dental adhesive composition exhibits excellent bond durability with respect to the surface of a one-pack type self-adhesive dental composite resin coating a prepared tooth surface. The present invention relates to a dental adhesive kit comprising: a one-pack type self-adhesive dental composite resin (X) that comprises a monomer (a-1) having a divalent phosphoric acid group with a backbone C8 to C16 alkyl or alkylene group within the molecule, a monomer (b) having no acidic group, a photopolymerization initiator (c), and a filler (d); and a separate-pack type dental adhesive composition (Y) that comprises a first agent and a second agent that are separately packed from each other, with the first agent comprising a monomer (a) having an acidic group, and a chemical polymerization initiator (e), and the second agent comprising a monomer (b) having no acidic group, wherein a cured product of the self-adhesive dental composite resin (X) after light curing has a flexural modulus ranging from 1.5 to 6 GPa, and a cured product of the separate-pack type dental adhesive composition (Y) after chemical curing has a flexural modulus ranging from 1.5 to 6 GPa.

IPC Classes  ?

• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61C 5/00 - Filling or capping teeth
• A61K 6/62 - Photochemical radical initiators

Abstract

The present invention provides a paste-form two-pack type dental curable composition having an adequate working time range and superior bond strength to dentin, in addition to showing small variation in working time, small decline in bond strength to dentin, and low risk of paste solidification over extended storage. The present invention relates to a paste-form two-pack type dental curable composition comprising: a first agent that comprises an acidic group-containing polymerizable monomer (A), an acidic group-free polymerizable monomer (B), an organic peroxide (C), a nitrogen atom-containing ligand (D), and a filler (E); and a second agent that comprises an acidic group-free polymerizable monomer (B), a thiourea compound (F), and a filler (E).

IPC Classes  ?

• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/76 - Fillers comprising silicon-containing compounds
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides a dental curable composition and a dental prosthesis therewith with which shade changes in the base material can be reduced, and that exhibit excellent gloss retention in the cured product while demonstrating excellence in operability. The present invention relates to a dental curable composition comprising a polymerizable compound (A), a polyfunctional thiol (B) having two or more mercapto groups per molecule, a polysiloxane (C), and a polymerization initiator (D).

IPC Classes  ?

• A61K 6/896 - Polyorganosilicon compounds
• A61C 13/087 - Artificial resin teeth
• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon

Abstract

The present invention pertains to a dental composition that contains a compound (a) having an acidic group, represented by the following formula (I): Formula (I): R1kk [where R1 represents an organic group having 40 carbon atoms or less, with or without at least one (meth)acryloyloxy group, X represents an acidic group, k represents an integer that is 1 or 2, and when k is 2, the two acidic groups X may be identical or different], calcium ions (b1), water (c), and a hydrophilic solvent (d), and that does not essentially contain a crosslinkable polymeric monomer that is an organic compound other than the compound (a) having an acidic group and that is an organic compound other than the hydrophilic solvent (d).

IPC Classes  ?

• A61K 6/54 - FillingSealing
• A61K 8/19 - Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
• A61K 8/24 - PhosphorusCompounds thereof
• A61K 8/37 - Esters of carboxylic acids
• A61Q 11/00 - Preparations for care of the teeth, of the oral cavity or of dentures, e.g. dentifrices or toothpastesMouth rinses

Abstract

The present invention provides a dental filling kit that exhibits good cavity sealing properties even when the cured product is subjected to repeated loads after cavities deeper than 2 mm, which normally require layered filling, are filled in bulk. The present invention relates to a dental filling kit comprising: a self-adhesive dental composite resin (X) that comprises a monomer (a) having an acidic group, a monomer (b) having no acidic group, a polymerization initiator (c), and a filler (d); and a dental composite resin (Y) that comprises a monomer (b) having no acidic group, a polymerization initiator (c), and a filler (d), but does not comprise a monomer (a) having an acidic group, wherein the polymerization initiator (c) contained in the dental composite resin (Y) comprises a photopolymerization initiator (c-1), and the dental composite resin (Y) is a bulk-fill composite resin, and has depth of cure of 4 mm or more.

IPC Classes  ?

• A61K 6/62 - Photochemical radical initiators
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides a dental composition that has high mechanical strength, excellent ease of polishing, and not only good paste properties but also high adhesive strength to tooth substance. The present invention relates to a dental composition that contains a monomer having an acidic group (a), a monomer free of acidic groups (b), a polymerization initiator (c), and a filler (d), the filler (d) containing an aggregated filler (d-1) in which primary particles are aggregated, the primary particles being a metal oxide, and the specific surface area of the aggregated filler (d-1) measured by the BET method being from 5 m2/g to 60 m2/g.

IPC Classes  ?

• A61K 6/80 - Preparations for artificial teeth, for filling teeth or for capping teeth
• A61K 6/15 - Compositions characterised by their physical properties
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/836 - Glass

Abstract

222222 is 10.0-50.0 mass% per 100 mass% of the dental porcelain; and a method for manufacturing a dental prosthetic appliance, the method comprising a step for applying the dental porcelain onto a zirconia substrate, and a step for firing the dental porcelain at 880-980°C.

IPC Classes  ?

• A61K 6/833 - Glass-ceramic composites
• A61C 13/003 - Prostheses without bases, e.g. dental bridgesMaking same
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/822 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising rare earth metal oxides
• A61L 27/10 - Ceramics or glasses
• C03C 3/062 - Glass compositions containing silica with less than 40% silica by weight
• C03C 3/078 - Glass compositions containing silica with 40% to 90% silica by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
• C04B 35/18 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on silicates other than clay rich in aluminium oxide

Abstract

A cutting machining device for a dental prosthesis cuts a block shaped workpiece with a machining tool by changing a relative positional relationship between the machining tool and the workpiece in three dimensions. The workpiece includes a plane (A1 plane) to which a base for attachment to the cutting machining device is fixed, and the cutting machining device includes a holding device as a positioning portion that positions the workpiece with respect to the machining tool so that the workpiece is cut from a vertical direction with respect to a facing plane (A2 plane) that faces the A1 plane.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same

Abstract

The present invention provides: a dental ceramic oxide calcined body that has excellent machinability, a low probability that chipping will occur, and high light transmittance after sintering; and a method for producing the same. The present invention relates to a dental ceramic oxide calcined body that includes ceramic oxide particles having an average primary particle diameter of 50–300 nm and fine pores, wherein D10 and D90 in a cumulative distribution of the fine pores in the calcined body are at least 20 nm and at least 90 nm, respectively. The dental ceramic oxide calcined body preferably has a relative density of 43%–63%. The BET specific surface area of the dental ceramic oxide calcined body as measured in accordance with JIS Z 8830:2013 is preferably 5–25 m2/g.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide

Abstract

The present invention provides: a partially sintered body comprising an oxide ceramic which has excellent polishing properties and has a favorable aesthetic appearance, since the polished surface of the partially sintered body and the surface of the sintered body thereof following sintering are very smooth; and a method for producing the same.　The present invention pertains to an oxide ceramic partially sintered body for dental use which contains oxide ceramic particles having an average roundness of the primary particles thereof of 0.81 or higher, and has a relative density of 43-63%.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 5/77 - Methods or devices for making crowns
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• C04B 35/111 - Fine ceramics
• C04B 35/486 - Fine ceramics

Abstract

The present invention provides an alumina pre-sintered body in which post-sintering yellowing is suppressed, a sintered body of which is highly translucent and has high linear light transmittance even when sintered under atmospheric pressure, and which becomes an alumina sintered body having high aesthetic qualities suitable for dental use. The present invention relates to a dental-use alumina pre-sintered body comprising alumina particles having an average primary particle diameter of 30-300 nm, a sintering aid, and a blue coloring agent, wherein the sintering aid content is 10-5,000 ppm.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/17 - Particle size
• A61K 6/804 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising manganese oxide
• C04B 35/117 - Composites

Abstract

The present invention provides a zirconia sintered body that excels in both mechanical strength and translucency, and a zirconia molded body and zirconia pre-sintered body capable of providing such a zirconia sintered body, and containing a binder in an amount that assumes a thickness of 10 mm or more. The invention also provides methods of production of these. The present invention relates to a zirconia molded body comprising: a zirconia particle containing 2.0 to 9.0 mol % of yttria relative to the total number of moles of zirconium oxide and yttria, and having an average primary particle diameter of 60 nm or less; a polyol; and a binder, the polyol and the binder satisfying the 10 relational formula X1

IPC Classes  ?

• C04B 35/488 - Composites
• A61C 13/00 - Dental prosthesesMaking same
• C04B 35/626 - Preparing or treating the powders individually or as batches
• C04B 35/634 - Polymers
• C04B 35/64 - Burning or sintering processes

Abstract

The present invention provides an oxide-ceramic molded body manufacturing method which uses an oxide-ceramic powder having a nano-order average primary particle size (in particular, 120 nm or less), and which is able to manufacture a molded body with a high production yield in a simple manner. The present invention relates to a method for manufacturing an oxide-ceramic molded body, which involves press-molding a powder that contains oxide-ceramic particles having an average primary particle size of 1-120 nm under a reduced pressure. The press molding is preferably carried out under a reduced pressure of 0.1-100 kPa.

IPC Classes  ?

• B28B 3/02 - Producing shaped articles from the material by using pressesPresses specially adapted therefor wherein a ram exerts pressure on the material in a moulding spaceRam heads of special form
• B82Y 99/00 - Subject matter not provided for in other groups of this subclass
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/486 - Fine ceramics

Abstract

The present invention provides an alumina workable body for dental use which, upon sintering, produces a sintered body which has excellent translucency, strength and linear light transmittance. The present invention pertains to an alumina workable body for dental use, wherein D1 and D2 differ from one another, if D1 is the average crystal grain diameter after sintering at a first point within an interval extending from one end P of the alumina workable body for dental use to 25% of the entire length along a straight line which extends in a first direction from said one end P toward the other end Q, and D2 is the average crystal grain diameter after sintering at a second point within an interval extending from the other end Q to 25% of the entire length along said straight line.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/111 - Fine ceramics

Abstract

The present invention provides a dental composition that shows improved adhesive properties to dental restoration materials such as porcelain, as well as tooth structure, and that is suited for reducing property changes during storage. The present invention relates to a dental composition comprising an organosilicon compound (A) represented by the following general formula (1), The present invention provides a dental composition that shows improved adhesive properties to dental restoration materials such as porcelain, as well as tooth structure, and that is suited for reducing property changes during storage. The present invention relates to a dental composition comprising an organosilicon compound (A) represented by the following general formula (1), Z—Xm—Y—SiR1nR2(3-n)  (1) The present invention provides a dental composition that shows improved adhesive properties to dental restoration materials such as porcelain, as well as tooth structure, and that is suited for reducing property changes during storage. The present invention relates to a dental composition comprising an organosilicon compound (A) represented by the following general formula (1), Z—Xm—Y—SiR1nR2(3-n)  (1) wherein Z represents a (meth)acryloyloxy group, a (meth)acrylamide group, a mercapto group, or an epoxy group, X represents a divalent organic group with a ratio C/O of 1 to 3, where C is the total number of carbon atoms, and O is the total number of oxygen atoms, Y represents a divalent hydrocarbon group having 1 to 30 carbon atoms, R1 represents a group selected from the group consisting of an alkyl group, an aryl group, and an aralkyl group, R2 represents a hydroxyl group or a hydrolyzable group, m represents an integer of 1 to 8, and n represents 0, 1, or 2, and wherein R1, R2, and X each may be the same or different when R1, R2, or X is plural.

IPC Classes  ?

• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives

Abstract

12211*(W-B)≥0.85

IPC Classes  ?

• C04B 35/486 - Fine ceramics
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/824 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising transition metal oxides
• A61L 27/10 - Ceramics or glasses
• C01G 25/00 - Compounds of zirconium
• C01G 25/02 - Oxides

Abstract

A dental adhesive composition containing: a polymerizable monomer (A) that has an acidic group; and a photoredox catalyst (B) that has a singlet excited state reduction potential ES1redred of 1.5 V vs. SCE or greater.

IPC Classes  ?

• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/23 - Fastening prostheses in the mouth using adhesive foils or adhesive compositions
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides a dental filling kit that comprises a dental cleaning material and a self-adhesive dental composite resin, and that exhibits good adhesive properties to tooth structure, and good sealing properties for cavities. The present invention relates to a dental filling kit comprising: a self-adhesive dental composite resin (X) comprising a monomer (a) having an acidic group, a monomer (b) having no acidic group, a polymerization initiator (c), and a filler (d); and a dental cleaning material (Y) having a pH of 2.0 or more and less than 9.0.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives

Abstract

A composition comprises a zirconia powder, in which 55% or more thereof is monoclinic, and a stabilizer capable of suppressing phase transition of zirconia. An average particle diameter of zirconia particles and particles of the stabilizer is 0.06 μm to 0.17 μm. At least a portion of the stabilizer does not form a solid solution with zirconia.

IPC Classes  ?

• C04B 35/48 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zirconium or hafnium oxides or zirconates or hafnates
• A61C 5/73 - Composite crowns

Abstract

An object of the present invention is to provide a dental composition that exhibits small polymerization shrinkage stress, and provides excellent mechanical strength. The present invention relates to a dental composition comprising a compound (A), a monomer (B) having a solubility of 50 g/L or more in acetone at 25° C., and a polymerization initiator (C), An object of the present invention is to provide a dental composition that exhibits small polymerization shrinkage stress, and provides excellent mechanical strength. The present invention relates to a dental composition comprising a compound (A), a monomer (B) having a solubility of 50 g/L or more in acetone at 25° C., and a polymerization initiator (C), wherein the compound (A) has a weight-average molecular weight of 1,000 to 80,000, and includes a Tg of less than 40° C., in addition to having a solubility of less than 50 g/L in acetone at 25° C. Preferably, the compound (A) comprises a compound having a polymerizable group.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61C 5/20 - Repairing attrition damage, e.g. facets
• C08F 222/10 - Esters
• C08L 35/02 - Homopolymers or copolymers of esters

Abstract

The present invention provides a dental cement that excels in ease of handling without its powder-to-liquid ratio greatly affecting ease of handling such as kneadability or ease of filling as compared to traditional dental portland cements, and that can provide a hardened material having excellent compressive strength. The present invention relates to a dental cement comprising a powder component and a liquid component, wherein: the powder component comprises a portland cement powder (A), the liquid component comprises water (C), and at least one of the powder component and the liquid component comprises a cationic surfactant (B). Preferably, the liquid component comprises the cationic surfactant (B).

IPC Classes  ?

• A61K 6/851 - Portland cements
• A61K 6/61 - Cationic, anionic or redox initiators

Abstract

Provided is a carious tooth structure recovery agent which can treat many teeth at one time and is therefore convenient, and can apply a prophylactic treatment and an early caries treatment for a cementum caries aesthetically without causing the discoloration of a treated site. The carious tooth structure recovery agent contains a compound (a) having an acidic group and represented by formula (I): R1-X [wherein R1 represents an organic group which has at least one (meth)acryloyloxy group or which has no (meth)acryloyloxy group and has 40 or less carbon atoms; and X represents an acidic group], a zinc ion (b1), water (c), and a hydrophilic solvent (d), and does not substantially contain a crosslinkable polymerizable monomer.

IPC Classes  ?

• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/70 - Preparations for dentistry comprising inorganic additives

Abstract

The present invention provides a dental restorative curable composition that has high mechanical strength and toughness and has excellent water resistance and smoothness/gloss durability in the form of a cured product, a dental composite resin comprising the dental restorative curable composition, and a dental mill blank comprising a cured product of the dental restorative curable composition. The present invention relates to a dental restorative curable composition comprising: a (meth)acrylic acid ester compound (A) which has at least one polymer structure selected from the group consisting of a polycarbonate, a polyarylate, and an aromatic polysulfone and in which terminal hydroxy residues derived from repeating units constituting the polymer structure are directly (meth)acryloylated; a (meth)acrylic acid ester compound (B) having two or more (meth)acryloyloxy groups (excluding the (meth)acrylic acid ester compound (A)); an inorganic filler (C) having an average primary particle diameter of 0.01 to 5 μm; and a polymerization initiator (D).

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61C 13/00 - Dental prosthesesMaking same
• A61K 6/871 - QuartzSiO2

Abstract

An object of the present invention is to provide a dental composition that exhibits small polymerization shrinkage stress, and provides excellent mechanical strength. The present invention relates to a dental composition comprising a compound (A) having a weight-average molecular weight of 2,000 or more, a monomer (B), and a polymerization initiator (C), wherein the compound (A) having a weight-average molecular weight of 2,000 or more has a glass transition region including a temperature range of 20 to 40° C., and the monomer (B) excludes the compound (A) having a weight-average molecular weight of 2,000 or more. The compound (A) having a weight-average molecular weight of 2,000 or more has a weight-average molecular weight of preferably less than 50,000.

IPC Classes  ?

• A61K 6/893 - Polyurethanes
• A61K 6/15 - Compositions characterised by their physical properties
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/62 - Photochemical radical initiators
• A61K 6/71 - Fillers
• A61K 6/829 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising cermet composites
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention relates to: a dental porcelain paste that contains a glass powder (A), an organic solvent (B), and a colorant (C), the color of which disappears during firing, and that satisfies at least one condition selected from condition (1) and condition (2); a dental porcelain kit; and a method for producing a dental porcelain prothesis. Condition (1): the color difference ΔE*calculated from a color tone obtained by measuring, in the L*a*b*color space, the color of the dental porcelain paste at a thickness of 0.5 mm before firing and a color tone obtained by measuring, in the L*a*b*color space, the color of a fired body having a thickness of 0.5 mm, the fired body being obtained by vacuum firing the dental porcelain paste at 740°C, is 8.5 or higher. Condition (2): the lightness difference ΔL*calculated from a lightness obtained by measuring, in the L*a*b*color space, the color of the dental porcelain paste at a thickness of 0.5 mm before firing and a lightness obtained by measuring, in the L*a*b* color space, the color of the fired body having a thickness of 0.5 mm that is obtained by vacuum firing the dental porcelain paste at 740°C is 6.5 or higher.

IPC Classes  ?

• A61K 6/15 - Compositions characterised by their physical properties
• A61K 6/20 - Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/77 - Glass
• A61K 6/836 - Glass

Abstract

The present invention provides curable calcium phosphate dental cement that has excellent sealability for dentinal tubule, is expected to form fluoroapatite, and has a curing time that is advantageous for clinical use. The present invention is directed to curable calcium phosphate dental cement including: a first material as powder or nonaqueous paste; and a second material as liquid or aqueous paste, and, in the curable calcium phosphate dental cement, the first material comprises tetracalcium phosphate (A), alkali metal salt of phosphoric acid (B), and acidic calcium phosphate (C), the second material comprises water (D), and at least one of the first material and the second material comprises a fluorine compound (E) and an organic acid (F) having a molecular weight of 10000 or less.

IPC Classes  ?

• A61K 6/864 - Phosphate cements
• A61Q 11/00 - Preparations for care of the teeth, of the oral cavity or of dentures, e.g. dentifrices or toothpastesMouth rinses

Abstract

A composition comprises a zirconia powder, in which 55% or more thereof is monoclinic, and a stabilizer capable of suppressing phase transition of zirconia. An average particle diameter of zirconia particles and particles of the stabilizer is 0.06 μm to 0.17 μm. At least a portion of the stabilizer does not form a solid solution with zirconia.

IPC Classes  ?

• C04B 35/48 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zirconium or hafnium oxides or zirconates or hafnates
• A61C 5/73 - Composite crowns

Abstract

The present invention provides a dental adhesive composition that can achieve both processability into a thin film of a cured product and high mechanical strength over a long period of time. This dental adhesive composition contains an acidic group-containing monomer (A), acidic group-free monomers (B), a polymerization initiator (C), water (D), a volatile organic solvent (E) and a filler (F), wherein: the acidic group-free monomers (B) include a monomer having 3 or more polymerizable groups per molecule (B-1), a hydrophobic monomer having 1 or 2 polymerizable groups per molecule (B-2), and a hydrophilic monomer having 1 or 2 polymerizable groups per molecule (B-3); the viscosity is less than 40 cps when measured at 30°C using a type B viscometer; and a cured product thereof has a water absorption rate of 4.0% or less.

IPC Classes  ?

• A61K 6/20 - Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/62 - Photochemical radical initiators

Abstract

The present invention provides a pre-sintered body for obtaining a zirconia sintered body that can satisfy both high strength and high translucency, and a method of production of such a pre-sintered body. The present invention relates to a zirconia pre-sintered body comprising a secondary aggregate having an average particle diameter of 275 nm or less, the secondary aggregate comprising zirconia, and a stabilizer capable of preventing a phase transformation of zirconia, the secondary aggregate comprising a larger particle having an average primary particle diameter of 100 nm or more and 200 nm or less, and a smaller particle having an average primary particle diameter of 10 nm or more and less than 60 nm.

IPC Classes  ?

• C04B 35/486 - Fine ceramics
• C04B 35/626 - Preparing or treating the powders individually or as batches
• C04B 35/64 - Burning or sintering processes

Abstract

The present invention provides a granule and green compact suited for obtaining a high-translucency and high-strength zirconia sintered body, and a high-density and uniform pre-sintered body. The invention also provides methods of production of such a granule and green compact. The present invention relates to a granule comprising zirconia, a stabilizing agent capable of preventing a phase transformation of zirconia, and a binder, the granule having a compression ratio R of 0.46 to 0.53 as calculated by the formula (1) below when tapped and filled into a columnar die in compliance with JIS R 1628:1997, and compressed by uniaxial pressing at a rate of 1 mm/s to 33 MPa, The present invention provides a granule and green compact suited for obtaining a high-translucency and high-strength zirconia sintered body, and a high-density and uniform pre-sintered body. The invention also provides methods of production of such a granule and green compact. The present invention relates to a granule comprising zirconia, a stabilizing agent capable of preventing a phase transformation of zirconia, and a binder, the granule having a compression ratio R of 0.46 to 0.53 as calculated by the formula (1) below when tapped and filled into a columnar die in compliance with JIS R 1628:1997, and compressed by uniaxial pressing at a rate of 1 mm/s to 33 MPa, R=(H−D)/H  (1) The present invention provides a granule and green compact suited for obtaining a high-translucency and high-strength zirconia sintered body, and a high-density and uniform pre-sintered body. The invention also provides methods of production of such a granule and green compact. The present invention relates to a granule comprising zirconia, a stabilizing agent capable of preventing a phase transformation of zirconia, and a binder, the granule having a compression ratio R of 0.46 to 0.53 as calculated by the formula (1) below when tapped and filled into a columnar die in compliance with JIS R 1628:1997, and compressed by uniaxial pressing at a rate of 1 mm/s to 33 MPa, R=(H−D)/H  (1) wherein H represents a height of the granule tapped and filled into the columnar die before applying pressure, and D represents an amount of strain up to 33 MPa.

IPC Classes  ?

• C01G 25/02 - Oxides
• C01G 1/02 - Oxides

Abstract

The present invention provides a dental ceramic coloring solution with which the pink shade needed for dental use can be imparted while reducing a decrease in the strength of a dental ceramic. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component and a solvent, wherein the coloring component comprises an Er component and a Co component.

IPC Classes  ?

• C04B 41/50 - Coating or impregnating with inorganic materials
• C04B 35/48 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zirconium or hafnium oxides or zirconates or hafnates
• C04B 41/46 - Coating or impregnating with organic materials
• C04B 41/85 - Coating or impregnating with inorganic materials
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/78 - Pigments

Abstract

A composition may include granules in which zirconia particles are aggregated. The granules may have an average circularity of 0.81 or greater based on a projected image. The zirconia crystal system of the zirconia particles may be 20% or more monoclinic. An angle of repose of the composition, measured in accordance with JIS R9301-2-2, may be in a range of from 20 degrees to 35 degrees.

IPC Classes  ?

• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/486 - Fine ceramics
• C01G 25/02 - Oxides

Abstract

The present invention provides a dental glass composition that has excellent fixability to dental prostheses, and that does not need firing and fixing to layer color or enable a build-up of porcelain thereon. The present invention relates to a dental glass composition comprising a glass powder (A) and a wax component (B). The glass powder (A) has an average particle diameter of preferably 0.05 μm to 50 μm. The wax component (B) has a boiling point of preferably 400° C. or less.

IPC Classes  ?

• C03C 8/16 - Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill additions with vehicle or suspending agents, e.g. slip
• C03C 4/00 - Compositions for glass with special properties
• C04B 41/00 - After-treatment of mortars, concrete, artificial stone or ceramicsTreatment of natural stone
• C04B 41/50 - Coating or impregnating with inorganic materials
• C04B 41/45 - Coating or impregnating
• C04B 41/86 - GlazesCold glazes

Abstract

The present invention provides a paste-like dental glass composition having good ease of handling due to a reduction in paste runniness while enabling accurate shade adjustments with no discoloration to hues such as black or grey after firing. The present invention relates to a paste-like dental glass composition comprising a glass powder (A), and an organic solvent (B) having two or less hydroxyl groups within the molecule and a viscosity at 20° C. of 2,500 mPa·s or less, and being essentially free of an organic compound having three or more hydroxyl groups within the molecule.

IPC Classes  ?

• A61K 6/836 - Glass
• A61K 6/15 - Compositions characterised by their physical properties

Abstract

The present invention provides a zirconia sintered body that has high strength and is machinable. The present invention relates to a zirconia sintered body comprising zirconia, a stabilizing agent capable of preventing a phase transformation of zirconia, a sintering aid, and a needle-shaped metal oxide. Preferably, the sintering aid comprises niobium pentoxide, and the content of the niobium pentoxide is 5 to 15 parts by mass with respect to total 100 parts by mass of the zirconia and the stabilizing agent. Preferably, the stabilizing agent comprises yttria, and the content of the yttria is 2.5 to 10 mol % with respect to the total number of moles of the zirconia and the yttria.

IPC Classes  ?

• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/824 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising transition metal oxides
• A61K 6/17 - Particle size

Abstract

The present invention provides a zirconia pre-sintered body that exhibits suitable shade, translucency, and strength with short firing. The present invention relates to a zirconia pre-sintered body comprising a multilayer structure including at least three layers containing zirconia and a stabilizer capable of reducing a phase transformation of zirconia, the zirconia comprising predominantly monoclinic crystal system, the multilayer structure including at least two layers that differ from one another in the content of the stabilizer relative to the total mole of the zirconia and the stabilizer, the multilayer structure including at least two layers having substantially the same stabilizer content relative to the total mole of the zirconia and the stabilizer, the zirconia pre-sintered body containing a color component in all of the layers having substantially the same stabilizer content, and the layers having substantially the same stabilizer content differing from one another in the composition of the color component.

IPC Classes  ?

• C04B 35/488 - Composites
• C04B 35/64 - Burning or sintering processes
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 13/08 - Artificial teethMaking same

Abstract

The present invention pertains to a porcelain paste for dentistry containing a positive-ion surfactant (A), a glass powder (B), and alcohol (C).

IPC Classes  ?

• A61K 6/836 - Glass
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics

Abstract

The present invention provides a zirconia pre-sintered body having excellent machinability and having a low probability of pillar fracture or chipping during milling. A method of production of such a zirconia pre-sintered body is also provided. The present invention relates to a zirconia pre-sintered body comprising zirconia, and a stabilizer capable of reducing a phase transformation of zirconia, the content of the stabilizer being 3 to 8 mol % relative to the total mole of the zirconia and the stabilizer, at least a part of the stabilizer being not dissolved in zirconia as a solid solution, and the zirconia pre-sintered body having a Vickers hardness of 65 to 135 HV 5/30 as measured in compliance with JIS Z 2244:2009.

IPC Classes  ?

• C04B 35/486 - Fine ceramics
• C04B 35/64 - Burning or sintering processes

Abstract

The present invention provides a dental ceramic coloring liquid with which a decrease in the mechanical strength of a dental ceramic after sintering can be reduced, and that can impart masking properties while having good preservation stability. The present invention relates to a dental ceramic coloring liquid comprising an organosilicon compound. The organosilicon compound is preferably hydrophilic. The organosilicon compound is preferably a silicone compound. The organosilicon compound is preferably an alkylsilane compound.

IPC Classes  ?

• A61K 6/896 - Polyorganosilicon compounds
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/65 - Dyes

Abstract

An object of the present invention is to provide a dental composition that shows desirable adhesive properties to tooth structure, and that has desirable mechanical strength in the form of a cured product while having low polymerization shrinkage stress. The present invention relates to a dental composition comprising: a (meth)acrylic compound (A); a monomer (B) having an acidic group and a molecular weight of less than 5,000; a monomer (C) having no acidic group and having a molecular weight of less than 5,000; and a polymerization initiator (D), the (meth)acrylic compound (A) having an average molecular weight of 5,000 to 50,000, and an average molecular weight of 1,250 or more and less than 20,000 per (meth)acryl group.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/62 - Photochemical radical initiators

Abstract

2225252225252225255 is 1-9 mol%, and an ion or an element derived from a capping agent is contained.

IPC Classes  ?

• C04B 35/488 - Composites
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/645 - Pressure sintering

Abstract

2225252225252225255, which is taken as 100 mol%, and further contains a Group-I element.

IPC Classes  ?

• C04B 35/488 - Composites
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/645 - Pressure sintering

Abstract

22252522252522252522.

IPC Classes  ?

• C04B 35/488 - Composites
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/645 - Pressure sintering

Abstract

The present invention provides a dental workpiece that has suitable strength for dental use and has exceptional machinability in a sintered state. The present invention relates to a dental workpiece for which the erosion rate is 8.0 μm/g or higher or the value of (erosion rate (μm/g))×(average crystal grain size (μm)) is 15 μm2/g or greater when a spherical alumina slurry having an average particle size of 3.0 μm is projected in a micro slurry-jet erosion test, and for which the biaxial bending strength measured in conformance with ISO 6872:2015 is 300 MPa or greater.

IPC Classes  ?

• C04B 35/486 - Fine ceramics
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide

Abstract

2225252225252225255, which is taken as 100 mol%, and further contains an element or ions derived from a capping agent.

IPC Classes  ?

• C04B 35/488 - Composites
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/645 - Pressure sintering

Abstract

The present invention provides a dental ceramic coloring solution with which the desired shade can be imparted to a dental ceramic while improving the strength of the dental ceramic. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component, a solvent, and a Zr component.

IPC Classes  ?

• A61C 13/08 - Artificial teethMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/78 - Pigments

Abstract

The present invention provides a dental curable composition that enables a highly aesthetic restoration that blends in so well with the surroundings that it is almost indistinguishable from natural teeth, and that, despite being a single dental curable composition, shows good color compatibility with natural teeth over a wide range of shades, particularly in cases involving cavity floors in different classes of cavities, such as Class I, Class II, and Class V The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), a polymerization initiator (C), and a colorant (D), wherein the ratios R650/600, R700/600, and R750/600 of spectral reflectances at 650 nm, 700 nm, and 750 nm wavelengths to a spectral reflectance at 600 nm wavelength all fall within a range of 97% to 103% when measured for a 1.0 mm-thick cured product of the dental curable composition against a white background with a spectral colorimeter.

IPC Classes  ?

• A61K 6/16 - Refractive index
• A61K 6/17 - Particle size
• A61K 6/76 - Fillers comprising silicon-containing compounds
• A61K 6/77 - Glass
• A61K 6/78 - Pigments
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides a method of production of a zirconia sintered body by which a zirconia molded body or zirconia pre-sintered body having a plurality of layers containing different amounts of stabilizer is sintered in a short time period to produce a zirconia sintered body having hardly noticeable stripes between layers differing in yttria content. The present invention relates to a method for producing a zirconia sintered body, comprising a firing step of firing a zirconia molded body or a zirconia pre-sintered body, the zirconia molded body or the zirconia pre-sintered body comprising a plurality of layers containing a stabilizer, the plurality of layers including layers having different stabilizer contents, the firing step comprising at least three stages of temperature-increasing process including a first temperature-increasing step (H1), a second temperature-increasing step (H2), and a third temperature-increasing step (H3), the method satisfying HR2=more than 0° C./min and less than 50° C./min, HR3=5 to 150° C./min, and HR3/HR2>1, where HR2 is a rate of temperature increase in H2, and HR3 is a rate of temperature increase in H3, the temperature-increasing process having start temperatures that are 1,000° C. or less in H1, more than 1,250° C. and 1,450° C. or less in H2, and 1,450° C. or more and 1,550° C. or less in H3, the temperature-increasing process having end temperatures that are more than 1,250° C. and 1,450° C. or less in H1, 1,450° C. or more and 1,550° C. or less in H2, and 1,500° C. or more and 1,750° C. or less in H3.

IPC Classes  ?

• C04B 35/48 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zirconium or hafnium oxides or zirconates or hafnates
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide

Abstract

The present invention provides a to-be-processed body for dentistry for preparing a dental prosthesis that faithfully reproduces a natural tooth as though dentin is present underneath enamel and influencing appearance when seen from a close distance, without requiring a complex structure or a complicated manufacturing process. The present invention relates to a to-be-processed body for dentistry for preparing a dental prosthesis, the to-be-processed body for dentistry satisfying L3>L1 and L3>L2 on a straight line extending along a first direction from one end P to the other end Q of the to-be-processed body for dentistry, where: The present invention provides a to-be-processed body for dentistry for preparing a dental prosthesis that faithfully reproduces a natural tooth as though dentin is present underneath enamel and influencing appearance when seen from a close distance, without requiring a complex structure or a complicated manufacturing process. The present invention relates to a to-be-processed body for dentistry for preparing a dental prosthesis, the to-be-processed body for dentistry satisfying L3>L1 and L3>L2 on a straight line extending along a first direction from one end P to the other end Q of the to-be-processed body for dentistry, where: L1 is the final L* according to L*a*b* color system over a black background at a first point lying in an interval from said one end P to 25% of the entire length, The present invention provides a to-be-processed body for dentistry for preparing a dental prosthesis that faithfully reproduces a natural tooth as though dentin is present underneath enamel and influencing appearance when seen from a close distance, without requiring a complex structure or a complicated manufacturing process. The present invention relates to a to-be-processed body for dentistry for preparing a dental prosthesis, the to-be-processed body for dentistry satisfying L3>L1 and L3>L2 on a straight line extending along a first direction from one end P to the other end Q of the to-be-processed body for dentistry, where: L1 is the final L* according to L*a*b* color system over a black background at a first point lying in an interval from said one end P to 25% of the entire length, L2 is the final L* according to L*a*b* color system over a black background at a second point lying in an interval from said other end Q to 25% of the entire length, and The present invention provides a to-be-processed body for dentistry for preparing a dental prosthesis that faithfully reproduces a natural tooth as though dentin is present underneath enamel and influencing appearance when seen from a close distance, without requiring a complex structure or a complicated manufacturing process. The present invention relates to a to-be-processed body for dentistry for preparing a dental prosthesis, the to-be-processed body for dentistry satisfying L3>L1 and L3>L2 on a straight line extending along a first direction from one end P to the other end Q of the to-be-processed body for dentistry, where: L1 is the final L* according to L*a*b* color system over a black background at a first point lying in an interval from said one end P to 25% of the entire length, L2 is the final L* according to L*a*b* color system over a black background at a second point lying in an interval from said other end Q to 25% of the entire length, and L3 is the final L* according to L*a*b* color system over a black background at a third point lying between the first point and the second point on a straight line connecting the first point to the second point.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• C04B 35/486 - Fine ceramics

Abstract

The present invention provides a dental ceramic coloring solution with which shades with the desired yellow tint can be imparted to a dental ceramic without causing fading, even when the dental ceramic colored with the coloring solution is baked after building up porcelain. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component and a solvent, wherein the coloring component comprises a V component.

IPC Classes  ?

• A61K 6/78 - Pigments
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/822 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising rare earth metal oxides

Abstract

The present invention provides a resin composition for stereolithography, the resin composition being excellent in terms of strength, toughness, water resistance and impact resistance of a shaped article thereof. The present invention relates to a resin composition for stereolithography, the resin composition containing a multifunctional (meth)acrylic monomer (A) that has a molecular weight of less than 500, a multifunctional (meth)acrylic monomer (B) that has a molecular weight of not less than 500 but less than 2,000, a multifunctional (meth)acrylic monomer (C) that has a molecular weight of not less than 2,000, and a photopolymerization initiator (D). With respect to a total of 100% by mass of polymerizable monomers in this resin composition for stereolithography: the content of the multifunctional (meth)acrylic monomer (A) that has a molecular weight of less than 500 is 25% by mass to 75% by mass; the content of the multifunctional (meth)acrylic monomer (B) that has a molecular weight of not less than 500 but less than 2,000 is 8% by mass to 32% by mass; and the content of the multifunctional (meth)acrylic monomer (C) that has a molecular weight of not less than 2,000 is not less than 0.1% by mass but less than 10% by mass.

IPC Classes  ?

• C08F 290/06 - Polymers provided for in subclass
• A61C 7/08 - Mouthpiece-type retainers
• A61C 13/01 - Bases
• B33Y 10/00 - Processes of additive manufacturing
• B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
• A61M 16/06 - Respiratory or anaesthetic masks
• B33Y 70/00 - Materials specially adapted for additive manufacturing

Abstract

207000) (wherein the meanings of the symbols are omitted).

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/16 - Refractive index
• A61K 6/17 - Particle size
• A61K 6/62 - Photochemical radical initiators
• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
• A61K 6/84 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
• A61K 6/842 - Rare earth metals
• A61K 6/893 - Polyurethanes

Abstract

100)2100)2100)2)1/2 (The meanings of symbols in the equation are omitted.)

IPC Classes  ?

• A61K 6/884 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
• A61K 6/15 - Compositions characterised by their physical properties
• A61K 6/16 - Refractive index
• A61K 6/17 - Particle size
• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
• A61K 6/84 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys

Abstract

The present invention provides an adhesive composition for a stereolithographic article and a non-stereolithographic article, the adhesive composition having excellent adhesiveness to both a molded article produced by stereolithography and a molded article produced by a method other than stereolithography. The present invention pertains to an adhesive composition for a stereolithographic article and a non-stereolithographic article, the adhesive composition containing a polyfunctional (meth)acrylic polymerizable monomer (A) and an organic solvent (B) having a normal pressure boiling point of 120°C or lower and a viscosity of 10 mPa·s or less at 25°C, wherein the polyfunctional (meth)acrylic polymerizable monomer (A) contains two or more polymerizable groups in one molecule and at least one selected from the group consisting of a urethane bond, an aromatic skeleton, and an amide bond, and the polymerizable group in the polyfunctional (meth)acrylic polymerizable monomer (A) is a (meth)acryloxy group or a (meth)acrylamide group.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/62 - Photochemical radical initiators

Abstract

The present invention provides a dental glass composition which exhibits excellent fixability to dental prostheses and does not require firing for fixation, and which is capable of suppressing the generation of excessive air bubbles and the occurrence of interfacial debonding at the interface between a base material and a dental ceramic material in cases where firing for fixation is not carried out, while making it possible to build up and fire a dental ceramic material thereon. The present invention relates to a dental glass composition which contains a glass powder (A) and a binder, wherein the binder contains a hydrophilic organic compound (B) that is in a solid state at 25°C, while substantially containing no water and no propylene glycol.

IPC Classes  ?

• A61K 6/836 - Glass

Abstract

The present invention provides a composition for dental attachments that exhibits excellent adhesive properties to uncut enamel without carrying out a pretreatment with, for example, a dental adhesive after etching with phosphoric acid or the like, and that has more than a certain level of mechanical characteristics, and enables a simplified bonding procedure for dental attachments. The present invention relates to a composition for dental attachments that comprises a polymerizable monomer (A), a photopolymerization initiator (B), and a filler (C), the polymerizable monomer (A) comprising a polymerizable monomer (A-1) having an acidic group, and a polymerizable monomer (A-2) having no acidic group, the content of the polymerizable monomer (A-1) having an acidic group being 1 to 40 parts by mass in total 100 parts by mass of the polymerizable monomer (A), the content of the filler (C) being 50 to 90 parts by mass in total 100 parts by mass of the composition.

IPC Classes  ?

• A61K 6/62 - Photochemical radical initiators
• A61K 6/35 - Preparations for stabilising dentures in the mouth
• A61C 7/14 - BracketsFixing brackets to teeth

Abstract

A zirconia molded body and a dental mill blank may decrease of the translucency of a zirconia sintered body upon firing even when the cooling solvent used for wet processing of the zirconia molded body or dental mill blank by a dental CAD/CAM system is contaminated. This can allow more convenient fabrication of a zirconia sintered body. A zirconia molded body may include zirconia; a stabilizer capable of inhibiting a phase transformation of zirconia; and a binder, and having an open porosity of 25% or less.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• C04B 35/486 - Fine ceramics
• C04B 35/634 - Polymers
• C04B 35/626 - Preparing or treating the powders individually or as batches
• C04B 35/64 - Burning or sintering processes
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/822 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising rare earth metal oxides
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides: a dental composition that has excellent storage stability even under extreme conditions and in which a cured product thereof has sufficient mechanical strength; a method for manufacturing said dental composition; and a dental surface-treated filler. The present invention pertains to a dental composition containing a polymerizable monomer (A), a polymerization initiator (B), and a filler (C). The filler (C) contains a dental surface-treated filler (C-1) surface-treated by an end capping agent (b) and a silane coupling agent (a) having a polymerizable group. The metal component elution amount in an acid resistance test of the dental surface-treated filler (C-1) is below 100 ppm.

IPC Classes  ?

• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/62 - Photochemical radical initiators
• A61K 6/71 - Fillers
• A61K 6/896 - Polyorganosilicon compounds

Abstract

The present invention provides an oxide-ceramic molded body manufacturing method using an oxide-ceramic powder having a nano-order average primary particle size (in particular, 120 nm or less), and being able to manufacture a molded body with a high production yield in a simple manner. The present invention relates to a method for manufacturing an oxide-ceramic molded body, in which method a powder containing oxide-ceramic particles having an average primary particle size of 1 to 120 nm is press-molded under a reduced pressure. The press molding is preferably carried out under a reduced pressure of 0.1 to 100 kPa or less.

IPC Classes  ?

• B28B 3/02 - Producing shaped articles from the material by using pressesPresses specially adapted therefor wherein a ram exerts pressure on the material in a moulding spaceRam heads of special form
• B28B 3/00 - Producing shaped articles from the material by using pressesPresses specially adapted therefor
• C04B 35/111 - Fine ceramics
• C04B 35/486 - Fine ceramics
• C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products

Abstract

The present invention provides an alumina pre-sintered body in which post-sintering yellowing is suppressed, a sintered body of which is highly translucent and has high linear light transmittance even when sintered under atmospheric pressure, and which becomes an alumina sintered body having high aesthetic qualities suitable for dental use. The present invention relates to a dental-use alumina pre-sintered body comprising alumina particles having an average primary particle diameter of 30-300 nm, a sintering aid, and a blue coloring agent, wherein the sintering aid content is 10-5,000 ppm.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/17 - Particle size
• A61K 6/804 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising manganese oxide
• C04B 35/117 - Composites

Abstract

The present invention provides: a zirconia sintered body that has both of high light permeability and high strength enough to be suitably used for a front tooth and a canine tooth (particularly a central incisor and a lateral incisor); and a method for producing the zirconia sintered body. The present invention relates to a zirconia sintered body comprising zirconia and a stabilizing agent capable of inhibiting the occurrence of phase transition of zirconia, in which crystal grains of the zirconia sintered body contain grains each having a grain diameter of 0.45 μm or more and less than 1 μm in a number-based grain diameter distribution at a proportion of 20 to 50%, and the grain diameter is a diameter that passes through the center of gravity of a grain.

IPC Classes  ?

• C01G 25/02 - Oxides
• C04B 35/486 - Fine ceramics
• C01F 17/218 - Yttrium oxides or hydroxides

Abstract

The present invention provides an energy ray-curable coating material for three-dimensional shaped articles that provides excellent toughness in the cured product, and an energy ray-curable material kit for three-dimensional shaping including the coating material. The present invention relates to an energy ray-curable coating material (A) for three-dimensional shaped articles, comprising a polymerizable compound and a polymerization initiator (c), the polymerizable compound comprising a monofunctional polymerizable compound (a), and/or a polyfunctional polymerizable compound (b) having two or more polymerizable groups per molecule, the polyfunctional polymerizable compound (b) having a Mw/n of 120 or more, where Mw is a molecular weight of the polyfunctional polymerizable compound (b), and n is the number of polymerizable groups per molecule.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• B29C 64/135 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
• B29C 64/188 - Processes of additive manufacturing involving additional operations performed on the added layers, e.g. smoothing, grinding or thickness control
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives

Abstract

The present invention provides: a dental ceramic oxide pre-sintered body that has excellent machinability, a low likelihood of chipping, and high post-sintering translucence; and a production method for the dental ceramic oxide pre-sintered body. The present invention relates to a dental ceramic oxide pre-sintered body that includes ceramic oxide particles and fine pores. The ceramic oxide particles have an average primary particle diameter of 50–300 nm, and the D10 and D90 of a cumulative distribution of the fine pores are at least 20 nm and no more than 90 nm, respectively. The dental ceramic oxide pre-sintered body preferably has a relative density of 43%–63%. The BET specific surface area of the dental ceramic oxide pre-sintered body as measured in accordance with JIS Z 8830:2013 is preferably 5–25 m2/g.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/00 - Dental prosthesesMaking same
• A61K 6/15 - Compositions characterised by their physical properties
• A61K 6/17 - Particle size
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• C04B 35/111 - Fine ceramics

Abstract

The present invention provides: a partially sintered body comprising an oxide ceramic which has excellent polishing properties and has a favorable aesthetic appearance, since the polished surface of the partially sintered body and the surface of the sintered body thereof following sintering are very smooth; and a method for producing the same.　The present invention pertains to an oxide ceramic partially sintered body for dental use which contains oxide ceramic particles having an average roundness of the primary particles thereof of 0.81 or higher, and has a relative density of 43-63%.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 5/77 - Methods or devices for making crowns
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• C04B 35/111 - Fine ceramics
• C04B 35/486 - Fine ceramics

Abstract

The present invention provides an alumina workable body for dental use which, upon sintering, produces a sintered body which has excellent translucency, strength and linear light transmittance. The present invention pertains to an alumina workable body for dental use, wherein D1 and D2 differ from one another, if D1 is the average crystal grain diameter after sintering at a first point within an interval extending from one end P of the alumina workable body for dental use to 25% of the entire length along a straight line which extends in a first direction from said one end P toward the other end Q, and D2 is the average crystal grain diameter after sintering at a second point within an interval extending from the other end Q to 25% of the entire length along said straight line.

IPC Classes  ?

• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 5/70 - Tooth crownsMaking thereof
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/111 - Fine ceramics

Abstract

The present invention provides: a zirconia sintered body that has superior bending strength, fracture toughness and light permeability in accordance with the content of yttria; and a method for producing the zirconia sintered body. The present invention relates to a zirconia sintered body which contains zirconia particles and satisfies the formula: A15/A50 < 0.60 (wherein A15 represents a particle diameter at which a cumulative area, which is determined by calculating the areas of the individual zirconia particles in a SEM image of the zirconia sintered body and then totaling areas of the zirconia particles in ascending order of area of the zirconia particles, reaches 15% of a total area; A50 represents a particle diameter at which a cumulative area determined in the same manner as mentioned above reaches 50% of the total area; and the total area is a total area of the zirconia particles found in the SEM image).

IPC Classes  ?

• C01G 25/02 - Oxides
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/486 - Fine ceramics

Abstract

The present invention provides: a dental curable composition which can impart fluorescence to a base material, has excellent operability, can suppress a change in the color tone of the base material, and from which a cured product having excellent wear resistance, lubrication durability, and fluorescence durability is obtained; and a dental prosthesis using the same. The present invention relates to a dental curable composition comprising a polymerizable compound (A), a polymerization accelerator (B), a fluorescent agent (C), and a polymerization initiator (D). The polymerization accelerator (B) contains a multifunctional thiol (B-1) having two or more mercapto groups in one molecule.

IPC Classes  ?

• A61K 6/20 - Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
• A61K 6/17 - Particle size
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/62 - Photochemical radical initiators
• A61K 6/65 - Dyes
• A61K 6/76 - Fillers comprising silicon-containing compounds
• A61K 6/78 - Pigments
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide

Abstract

Provided is an energy-ray-curable composition for three-dimensional shaping use, which makes it possible to produce a three-dimensional shaped article having excellent flexibility, excellent water resistance and an excellent hue, the composition comprising (A) a polymerizable monomer having an oxygen atom that is directly bound to an aromatic ring, (B) an indigoid dye and (C) a photopolymerization initiator, in which the content of the indigoid dye (B) is 0.0015 to 0.100 part by mass relative to 100 parts by mass of the polymerizable monomer (A).

IPC Classes  ?

• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08F 2/46 - Polymerisation initiated by wave energy or particle radiation
• B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
• B29C 64/314 - Preparation
• A61K 6/62 - Photochemical radical initiators
• A61K 6/65 - Dyes
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

Provided is a zirconia calcined body having suitable color tone, translucency, and strength. The present invention relates to a zirconia calcined body comprising a laminate structure having at least three layers, containing zirconia and a stabilizer capable of suppressing phase transition of the zirconia, the laminate structure comprising at least two layers having mutually different contents of the stabilizer with respect to the total number of moles of zirconia and the stabilizer, the laminate structure comprising at least two layers having substantially the same content of the stabilizer with respect to the total number of moles of zirconia and the stabilizer, and all of the layers that have substantially the same content of the stabilizer including a colorant component, the colorant components having mutually different compositions in said layers.

IPC Classes  ?

• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/488 - Composites

Abstract

The present invention pertains to: a dental curable composition which contains a (meth)acrylic compound (A) having two or more (meth)acryloyl groups per molecule, a specific mono(meth)acrylic ester compound (B), a chemical polymerization initiator (C), a polymerization accelerator (D) and a filler (E) and which is packaged in two separate parts, i.e., a first material containing the chemical polymerization initiator (C) and a second material containing the polymerization accelerator (D); a dental filling and restorative material comprising the dental curable composition; a dental cement comprising the dental curable composition; and a dental abutment building material comprising the dental curable composition.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/836 - Glass

Abstract

The present invention relates to: a curable dental composition comprising a (meth)acrylic monomer (A) that contains, per molecule, two or more (meth)acryloyloxy groups and one or more urethane bonds, a (meth)acrylic acid ester compound (B) that contains, per molecule, two or more (meth)acryloyloxy groups and one or more hydroxyl groups, a polymerization initiator (C), and an ion-releasing compound (D); a dental filling and restoration material comprising said curable dental composition; a dental cement comprising said curable dental composition; and a dental core buildup material comprising said curable dental composition.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/836 - Glass

Abstract

The present invention provides: a zirconia composition, a sintered body of which has excellent light transmitting properties, and which is capable of suppressing the opal properties of a sintered body thereof; a zirconia calcined body and a zirconia sintered body, each of which uses this zirconia composition; and a production method which is capable of easily producing this zirconia calcined body or this zirconia sintered body. The present invention relates to a zirconia composition which contains zirconia particles and stabilizer particles that are capable of suppressing a phase transition of zirconia, wherein: the average particle diameter (r1) of the zirconia particles is 1 nm to 60 nm; the average particle diameter (r2) of the stabilizer particles is 1 nm to 60 nm; and the half width of a peak ascribed to the stabilizer as determined by a powder X-ray diffraction pattern obtained using a CuKα ray is 0.05° to 1.0°. The present invention enables the achievement of a zirconia sintered body which has excellent light transmitting properties and low opal properties, since the regularity of the structure of a zirconia sintered body is decreased and wavelength selective reflection and/or transmission is suppressed by using the above-described zirconia composition, thereby suppressing the opal properties.

IPC Classes  ?

• C04B 35/486 - Fine ceramics

Abstract

The present invention provides a dental curable composition that exhibits excellent mechanical strength in its cured product, and possesses high paste flowability and sufficient formability, previously deemed conflicting paste properties. The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), and a polymerization initiator (C), wherein: the polymerizable monomer (A) comprises 0 parts or more by mass and less than 15 parts by mass of a hydrophilic polymerizable monomer (A-1a) having no acidic group, and 55 parts or more by mass of a hydrophobic polymerizable monomer (A-1b) having no acidic group in total 100 parts by mass of the polymerizable monomer (A), and the hydrophilic polymerizable monomer (A-1a) having no acidic group has a solubility of 4.5 g/L or more in water at 25°C , the filler (B) comprises 1 to 60 parts by mass of a spherical filler (B-1) having an average particle diameter of 0.01 to 1 ?m, 40 to 99 parts by mass of an irregularly shaped filler (B-2) having an average particle diameter of 0.5 to 6.0 ?m, and 0 to 10 parts by mass of an irregularly shaped fine particulate filler (B-3) having an average particle diameter of less than 0.5 ?m in total 100 parts by mass of the filler (B), and the spherical filler (B-1) is hydrophobized with a hydrophobizing agent (x-1), and the polymerization initiator (C) comprises a photopolymerization initiator (C-1).

IPC Classes  ?

• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/54 - FillingSealing
• A61K 6/62 - Photochemical radical initiators
• A61K 6/71 - Fillers
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides a dental curable composition, a cured product of which has excellent mechanical strength, and which has both high paste fluidity and sufficient shapeability, which have conventionally been considered to be contradictory paste properties. The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), and a polymerization initiator (C), wherein: the polymerizable monomer (A) contains, in a total of 100 parts by mass of the polymerizable monomer (A), 0 or more parts by mass but less than 15 parts by mass of a hydrophilic polymerizable monomer (A-1a) that has no acidic group, and not less than 55 parts by mass of a hydrophobic polymerizable monomer (A-1b) that has no acidic group; the amount of dissolution of the hydrophilic polymerizable monomer (A-1a) that has no acidic group with respect to water at 25°C is not less than 4.5 g/L; the filler (B) contains, in a total of 100 parts by mass of the filler (B), 1-60 parts by mass of a spherical filler (B-1) that has an average particle size of 0.01-1 μm, 40-99 parts by mass of an amorphous filler (B-2) that has an average particle size of 0.5-6.0 μm, and 0-10 parts by mass of an amorphous fine particle filler (B-3) that has an average particle size of less than 0.5 μm; the spherical filler (B-1) has been hydrophobized with a hydrophobizing agent (x-1); and the polymerization initiator (C) contains a photopolymerization initiator (C-1).

IPC Classes  ?

• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/54 - FillingSealing
• A61K 6/62 - Photochemical radical initiators
• A61K 6/71 - Fillers
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The present invention provides a paste-form two-part curable composition for dental use, the composition being such that an operation time therefor is within a suitable range, having exceptional adhesive strength with respect to dentine, and being such that, in addition to having little variation in operation time and little reduction in adhesive strength with respect to dentine during storage over an extended period, the risk that the paste will solidify is also low. The present invention relates to a paste-form two-part curable composition for dental use, the composition comprising: a first agent that contains an acidic-group-containing polymerizable monomer (A), an acidic-group-free polymerizable monomer (B), an organic peroxide (C), nitrogen-atom-containing ligands (D), and a filler (E); and a second agent that contains the acidic-group-free polymerizable monomer (B), a thiourea compound (F), and the filler (E).

IPC Classes  ?

• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/61 - Cationic, anionic or redox initiators
• A61K 6/70 - Preparations for dentistry comprising inorganic additives
• A61K 6/76 - Fillers comprising silicon-containing compounds
• A61K 6/77 - Glass
• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
• A61K 6/836 - Glass
• A61K 6/86 - Al-cements

Abstract

The present invention provides a divided dental curing composition which has favorable chemical polymerization curing properties, and exhibits excellent adhesion durability to a CAD/CAM resin. The present invention pertains to a divided dental curing composition which contains: a polymerizable monomer (A) which has an acidic group; a polymerizable monomer (B) which does not have an acidic group; an ascorbic acid compound (C); an organic peroxide compound (D); a transition metal compound (E); and a silane coupling agent (F) which is represented by general formula (f-1) (explanation of symbols in formula is omitted).

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
• A61K 6/836 - Glass
• A61K 6/84 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys

Abstract

The present invention provides a curable dental composition that has excellent working time and excellent properties such as bond strength to the dentin. The present invention pertains to a curable dental composition comprising: a polymerizable monomer (A) that has an acidic group; a polymerizable monomer (B) that has no acidic group; a chemical polymerization initiator (C); a polymerization accelerator (D); a transition metal compound (E); and a ligand compound (F), wherein the ligand compound (F) is at least one compound selected from the group consisting of phosphorus atom-containing ligands and nitrogen atom-containing ligands.

IPC Classes  ?

• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• A61K 6/30 - Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• A61K 6/64 - Thermal radical initiators
• A61K 6/79 - Initiators
• A61K 6/836 - Glass

Abstract

The present invention provides a resin composition for stereolithography that is easily shapable with good shape precision while reducing sedimentation of inorganic particles during storage, and a obtained three-dimensional shaped article thereby excels in mechanical characteristics such as flexural strength and flexural modulus, in addition to having a desirable shade and good shade stability. The present invention relates to a resin composition for stereolithography comprising a polymerizable monomer (a), a photopolymerization initiator (b), an inorganic particle (c) having an average particle diameter of 5 to 500 nm, and a hindered phenolic compound (d), wherein the content of the photopolymerization initiator (b) is 0.1 to 10 parts by mass relative to 100 parts by mass of the polymerizable monomer (a), the content of the inorganic particle (c) is 50 to 400 parts by mass relative to 100 parts by mass of the polymerizable monomer (a), and the content of the hindered phenolic compound (d) is 0.1 to 500 parts by mass relative to 100 parts by mass of the photopolymerization initiator (b).

IPC Classes  ?

• B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing

Abstract

The present invention provides a resin composition for stereolithography that excels in strength, toughness, and water resistance in the form of a shaped article. The present invention relates to a resin composition for stereolithography that comprises a urethanized (meth)acrylic compound (A), a (meth)acrylate compound (B) containing no urethane bond, and a photopolymerization initiator (C), the compound (A) being a urethanized (meth)acrylic compound (A-1) having a polymer structure, and/or a urethanized (meth)acrylic compound (A-2) having no polymer structure, the compound (A-1) having a weight-average molecular weight of less than 1,000, the compound (A-2) having a molecular weight of less than 1,000, the compound (B) comprising at least one selected from the group consisting of a (meth)acrylate compound (b-I) represented by general formula (I), and a (meth)acrylate compound (b-II) represented by general formula (II). The present invention provides a resin composition for stereolithography that excels in strength, toughness, and water resistance in the form of a shaped article. The present invention relates to a resin composition for stereolithography that comprises a urethanized (meth)acrylic compound (A), a (meth)acrylate compound (B) containing no urethane bond, and a photopolymerization initiator (C), the compound (A) being a urethanized (meth)acrylic compound (A-1) having a polymer structure, and/or a urethanized (meth)acrylic compound (A-2) having no polymer structure, the compound (A-1) having a weight-average molecular weight of less than 1,000, the compound (A-2) having a molecular weight of less than 1,000, the compound (B) comprising at least one selected from the group consisting of a (meth)acrylate compound (b-I) represented by general formula (I), and a (meth)acrylate compound (b-II) represented by general formula (II).

IPC Classes  ?

• C08F 290/06 - Polymers provided for in subclass
• A61L 31/04 - Macromolecular materials
• A61K 6/887 - Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• B33Y 70/00 - Materials specially adapted for additive manufacturing

Abstract

The present invention provides a method for manufacturing an intraoral apparatus equipped with a coating, the method making it possible to form, on a prescribed surface of an intraoral apparatus that is a stereolithographic article of a curable composition for stereolithography, a coating capable of imparting exceptional adhesion durability and toughness, and relates to a method for manufacturing an intraoral apparatus equipped with a coating, the method comprising: applying, to a prescribed surface of an intraoral apparatus that is a stereolithographic article of a curable composition (A) for stereolithography containing a (meth)acrylic polymerizable monomer (a) and a photopolymerization initiator (b), a curable composition (B) containing the same (meth)acrylic polymerizable monomer (a) as that contained in the curable composition (A) for stereolithography; and forming, on a prescribed surface of the intraoral apparatus, a coating of a resin (B1) containing a polymer having a structure derived from the same (meth)acrylic polymerizable monomer (a) as that contained in the curable composition (A) for stereolithography.

IPC Classes  ?

• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61C 7/08 - Mouthpiece-type retainers
• A61C 13/01 - Bases
• A61C 13/07 - Linings or cushions therefor
• A61C 13/15 - Curing devices for plastics prostheses for curing by the action of light