Abstract: An object of the present invention is to provide a two-paste type dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability.

Abstract: An object of the present invention is to provide a two-paste type dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability.

Abstract: According to an aspect of the present invention, a dental alginate impression material includes an alginate, calcium sulfate, and an aminocarboxylic acid compound.

Abstract: According to an aspect of the present invention, a dental alginate impression material includes an alginate, calcium sulfate, and an aminocarboxylic acid compound.

Abstract: Provided is an impression tray with which three-dimensional data is easily obtained, including an upper jaw impression tray and lower jaw impression tray, wherein the upper jaw impression tray includes an upper jaw impression tray main body 11 including a surface where the impression material is to be placed; the lower jaw impression tray includes a lower jaw impression tray main body including a surface where the impression material is to be placed; a handle is attachably and detachably provided on at least either one of the upper jaw impression tray main body and lower jaw impression tray main body; and the handle, having a posture of attachment, projects from at least any one of a labial side, the upper jaw impression tray excepting the surface where the impression material is to be placed, and lower jaw impression tray excepting the surface where the impression material is to be placed.

Abstract: A robot system includes a supply section configured to supply an object, a first test section group including a plurality of first test sections configured to test the supplied object, a second test section group including a plurality of second test sections configured to test the supplied object, a collecting section configured to collect the tested object, and a robot including a robot arm and configured to hold, convey, and release the object. The robot is capable of collectively conveying a plurality of the objects. A total of conveyance times for the conveyance of the object by the robot from the supply to the collection of the object is shorter than a total of processing times for the holding and the release of the object by the robot.

Abstract: Provided is an artificial tooth that can be unfailingly attached to a denture base in arranging the artificial tooth on the denture base designed and formed with a CAD/CAM, including a convex portion to be inserted in an internal corner of a concave portion of the denture base, wherein the convex portion is configured to form a predetermined gap with the internal corner without having contact with the internal corner when inserted in the internal corner.

Abstract: An object is to provide an artificial tooth that can be attached to a denture base designed by CAD/CAM to be formed easily and accurately when the artificial tooth is arranged on the denture base. In an artificial tooth (21) that has a shape corresponding to a denture base that is designed on CAD based on three-dimensional data and is cut out, a regulator (21a to 21h) that regulates the rotation on the axis of the tooth as the center is provided for a portion to touch the denture base, and the regulator has a shape so as not to engage with the denture base in the direction of the axis of the tooth.

Abstract: Provided is an impression tray with which three-dimensional data is easily obtained, including an upper jaw impression tray and lower jaw impression tray, wherein the upper jaw impression tray includes an upper jaw impression tray main body 11 including a surface where the impression material is to be placed; the lower jaw impression tray includes a lower jaw impression tray main body including a surface where the impression material is to be placed; a handle is attachably and detachably provided on at least either one of the upper jaw impression tray main body and lower jaw impression tray main body; and the handle, having a posture of attachment, projects from at least any one of a labial side, the upper jaw impression tray excepting the surface where the impression material is to be placed, and lower jaw impression tray excepting the surface where the impression material is to be placed.

Abstract: To provide a most suitable block body for producing a denture base used when producing a denture base by cutting, the block body for producing a denture base is produced by polymerizing a (meth)acrylate monomer so as to have a color tone within a range that L* is 40 to 55, a* is 14 to 31, and b* is 5 to 20 when the color tone is measured with a sample thickness of 4 mm based on JIS Z8729, and to be preferably in a cylindrical shape having a diameter of 8 to 15 cm and a height of 1.5 to 5 cm, or in an elliptical-cylindrical shape having a major diameter and minor diameter of 8 to 15 cm and a height of 1.5 to 5 cm.

Abstract: To provide a dual curing type composite resin for core build-up having improved curing property by chemical polymerization with improved mechanical strength of a cured body under the condition of no light irradiation and with a shortened setting time, the composite resin is composed of a first component including a (meth)acrylate polymerizable resin and an organic peroxide, and a second component including (meth)acrylate polymerizable resin and a reducing agent, a photopolymerizaton initiator and a filler are included in the first component and/or the second component, and oxide powder of a Group II element in the periodic table having an average particle diameter of 1 ?m or less is blended in the first component and/or the second component.

Abstract: A spectacle lens marking method includes: ejecting a first ink drop of ultraviolet curable ink from a nozzle by ink jet system onto a surface of a water-repellent layer provided on the surface of the spectacle lens; and hardening the first ink drop by applying ultraviolet light to the first ink drop.

Abstract: To provide a dual curing type composite resin for core build-up having improved curing property by chemical polymerization with improved mechanical strength of a cured body under the condition of no light irradiation and with a shortened setting time, the composite resin is composed of a first component including a (meth)acrylate polymerizable resin and an organic peroxide, and a second component including (meth)acrylate polymerizable resin and a reducing agent, a photopolymerizaton initiator and a filler are included in the first component and/or the second component, and oxide powder of a Group II element in the periodic table having an average particle diameter of 1 ?m or less is blended in the first component and/or the second component.

Abstract: To provide a photopolymerizable dental coating composition that, when applied to the surface of a dental resin material such as crown restoratives, dental fillers, and denture or denture base resins, is thoroughly cured upon irradiation with a visible light and produces a smooth, colorless and transparent cured surface after curing so that a film having superior durability, abrasion resistance and resistance to discoloration can be formed, the photopolymerizable dental coating composition includes a volatile (meth)acrylate compound, a polyfunctional acrylate as a cross-linking agent, a fluoroalkyl group constituted of at least one fluorocarbon-containing (meth)acrylate compound for improving the durability, abrasion resistance and resistance to discoloration after curing, and an acyl phosphine oxide-based polymerization initiator having a high polymerization promoting effect for monomers, which does not make the polymerized composition remain yellowish.

Abstract: A paste-like polymerizable composition in which two or three pastes are intimately mixed with each other to polymerize, the pastes do not gel and their polymerization curing times being stable, even when the pastes before the polymerization are preserved for a long time, the paste-like polymerizable composition is constructed of a first paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler and (c) a pyrimidinetrione derivative; and a second paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler, (d) an organic halide and (e) an organometallic compound, or a third paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler and (d) an organic halide and a fourth paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler and (e) an organometallic compound.

Abstract: A light irradiation apparatus for a dental photo polymerization composite resin of multi-purpose type which can efficiently and completely polymerize and cure the dental photo polymerization composite resin using a combination of the camphor quinone and the tertiary amine as the photo polymerization catalyst, and can also polymerize and cure the dental photo polymerization composite resin using the acylphosphine oxide as the newly developed photo polymerization initiator. with a structure such that there are arranged a blue ray radiation LED 5 having luminous wavelengths peaked at a wavelength of 450 nm or more but not more than 490 nm, and a near ultraviolet rays and/or violet rays radiation LED 6 having luminous wavelengths peaked at a wavelength of 370 nm or more but less than 410 nm, and there is provided a circuit changing switch 7 at least for simultaneously turning on these two kinds of LEDs 5, 6 and for turning on only the near ultraviolet rays and/or violet rays radiation LED 6.

Abstract: In order to suppress adhesion of oral contamination substances such as protein and oral bacteria causing oral disorders such as ozostomia on a surface of a dental prosthesis, so as to prevent a biofilm such as dental plaque from being formed thereon, the coating material composition for a dental prosthesis comprises 1 to 150 g/l of a copolymer of 2-methacryloyloxyethylphosphorylcholine and a (meth)acrylate contained in at least one solvent selected from water, ethanol, propanol, butanol, pentanol and acetone, an amount of the 2-methacryloyloxyethylphosphorylcholine component in the copolymer being 3 to 90% by mole.

Abstract: To provide a paste-like polymerizable composition in which two or three pastes are intimately mixed with each other to polymerize, the pastes doing not gel and their polymerization curing times being stable, even when the pastes before the polymerization are preserved for a long time, the paste-like polymerizable composition is constructed of a first paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler and (c) a pyrimidinetrione derivative; and a second paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler, (d) an organic halide and (e) an organometallic compound, or a third paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler and (d) an organic halide and a fourth paste containing (a) a (meth)acrylate having at least one unsaturated double bond, (b) a filler and (e) an organometallic compound.

Abstract: There is provided a resin composition for soft relining material that can meet the performances required in a soft relining material for denture base, such as a proper softness and fitness between a denture base and an oral mucosa, without using a phthalate-based plasticizer widely used in the conventional art resin composition for soft relining material, which is pointed out to have a possibility for influencing living bodies as an endocrine disruptor. The soft resin composition for denture base is constructed of (a) a (meth)acrylate monomer having at least one unsaturated double bond; (b) an aliphatic acid ester-based plasticizer; (c) a (meth)acrylate polymer or copolymer; and (d) a polymerization initiator.

Abstract: A resin material for denture base that is less in possibility to incorporate air bubbles into a mixed material, exhibits a proper elasticity during the elimination from an oral cavity, not causing deformation, and can impress precisely the state in the oral cavity, is provided. The resin material for denture base is of a two-liquid type, constructed by (a) a methacrylate or acrylate monomer having at least one unsaturated double bond; (b) one or two or more polymers selected from the group consisting of a methacrylate polymer, an acrylate polymer, a methacrylate/acrylate copolymer, a methacrylate/styrene copolymer, and an acrylate/styrene copolymer; and (c) a polymerization initiator, wherein a liquid A comprises the polymer (b), the monomer (a) having a solubility to the polymer (b) of 20% by weight or more, and the polymerization initiator (c); and a liquid B comprises the polymer (b) and the monomer (a) having a solubility to the polymer (b) of less than 20% by weight.