Abstract: The present invention provides a container used in a stereolithography apparatus and having excellent transparency, shape accuracy, and durability. The present invention relates to a container for holding a photocurable composition (3), the container being used in a stereolithography apparatus comprising a container (2), an active energy beam irradiation apparatus (5), and an actuator (8), wherein the container (2) comprises a bottom (2?) and a wall, the bottom (2?) comprises a first layer (X) comprising a hard resin, a second layer (Y) comprising a soft resin, and a third layer (Z) comprising a fluorine resin, the second layer (Y) is laminated on the first layer (X) and the third layer (Z) is laminated on the second layer (Y), the pencil hardness measured according to JIS K 5600-5-4:1999 for the first layer (X) is 3 B or harder, the hardness measured for the second layer (Y) using a type A durometer compliant with JIS K 6253-3:2012 is 10 to 90, and the third layer (Z) has a thickness of 0.1 to 5.0 mm.

Abstract: The present invention provides a method that enables production of a surface-treated colored inorganic particle with which the desired color tone can be consistently reproduced as intended with no variation occurring in the color tone of the compositions produced with the particle, within each production and over multiple production runs. The invention relates to a method for producing a surface-treated colored inorganic particle, comprising spray drying a mixture of a dispersion [I] and a solution [II], wherein the dispersion [I] is a dispersion of inorganic particles having an average particle diameter of 0.005 to 5 ?m dispersed in a solvent with a pigment, and the solution [II] is a solution of a surface treatment agent hydrolyzed in the presence of a hydrolysis aid.

Abstract: The present invention provides a non-solvent dental adhesive composition exhibiting high initial bond strength and high bond durability to a tooth structure (wet matter) and a high dentin cohesive failure rate on a tooth structure (wet matter) and being substantially free of water and an organic solvent. The present invention relates to a non-solvent dental adhesive composition comprising: an acid group-containing polymerizable monomer (A); a hydrophobic polymerizable monomer (B) having no acid group; and a water-soluble photopolymerization initiator (C) having a solubility of 10 g/L or more in water at 25° C.

Abstract: The present invention provides a method that is for producing a zirconia sintered body and by which a zirconia molded body or a zirconia pre-sintered body is sintered in a short period of time, the zirconia sintered body reproducing an aesthetic requirement and strength of an ideal dental prosthesis at the same levels as those of a zirconia sintered body obtained by general firing.

Abstract: A resin composition for stereolithography may emit a weak odor, enable easy fabrication of an object, and may be made into a cured product having desirable toughness and water resistance when used for stereolithographical fabrication. A resin composition for stereolithography may include: an ?,?-unsaturated double bond group-containing compound (A) having a homopolymer glass transition temperature (Tg) of 40° C. or more, having a plurality of independent aromatic rings, and having no urethane bond; an ?,?-unsaturated double bond group-containing compound (B) having a homopolymer glass transition temperature (Tg) of less than 40° C., having a ring structure, and having a normal boiling point of 250° C. or more; and a photopolymerization initiator (C).

Abstract: A method for manufacturing a mouthpiece, wherein the mouthpiece is to be placed within an oral cavity to cover teeth and manufactured by an additive manufacturing device, the method including performing additive manufacturing for manufacturing a manufactured product that comprises the mouthpiece, a peripheral portion connected to the mouthpiece, and a support configured to support the peripheral portion, acid removing the peripheral portion from the manufactured product.

Abstract: The present invention provides a mill blank having a multilayer structure and excellent aesthetics, and a method for producing the mill blank. The present invention relates to a mill blank for dental use comprising a mill blank portion having a multilayer structure with two or more layers, wherein the multilayer structure comprises a body layer (3) inside an enamel layer (1), and the body layer (3) is shaped to comprise a bottom face and a side face, the side face having a portion perpendicular to the bottom face.

Abstract: The present invention provides a resin composition for stereolithographic modeling emitting a weak odor, having desirable shape accuracy, and made into a cured product having desirable strength, toughness, and color tone when used for stereolithographic modeling. The present invention relates to a resin composition for stereolithographic modeling, comprising: a polymerizable monomer (A); a photopolymerization initiator (B), and an organic peroxide (C), wherein the polymerizable monomer (A) comprises a (meth)acrylic acid ester compound (A-1) having a viscosity of 1,000 mPa·s or less and a normal boiling point of 270° C. or more and/or a (meth)acrylamide compound (A-2) having a viscosity of 1,000 mPa·s or less and a normal boiling point of 200° C. or more, and the photopolymerization initiator (B) is at least one selected from a (bis)acylphosphine oxide, an ?-hydroxyketone compound, an ?-aminoketone compound, a benzoin alkyl ether compound, a thioxanthone, a ketal, an ?-diketone, and an anthraquinone.

Abstract: The present invention provides a zirconia sintered body containing a fluorescent agent and having excellent translucency and excellent strength. The present invention also provides a zirconia shaped body and a zirconia calcined body from which the zirconia sintered body can be obtained. The present invention relates to a zirconia sintered body comprising a fluorescent agent, wherein the zirconia sintered body comprises 4.5 to 9.0 mol % yttria, and has a crystal grain size of 180 nm or less, and a three-point flexural strength of 500 MPa or more. The present invention relates to a zirconia shaped body comprising a fluorescent agent, wherein the zirconia shaped body comprises 4.5 to 9.0 mol % yttria, and has a three-point flexural strength of 500 MPa or more after being sintered at 1,100° C. for 2 hours under ordinary pressure, and a crystal grain size of 180 nm or less after being sintered at 1,100° C. for 2 hours under ordinary pressure.

Abstract: The present invention provides a two-paste dental curable composition achieving clinically acceptable bond durability to dental adherends including dental glass ceramic restorations (particularly lithium disilicate-containing glass ceramic restorations) without using conventionally used primers. The present invention relates to a two-paste dental curable composition comprising: a first agent comprising a polymerizable monomer (a) having an acid group, a polymerizable monomer (b) having no acid group, a polymerization initiator (c), and a filler (d); and a second agent comprising a polymerizable monomer (b) having no acid group, at least one filler (e) selected from the group consisting of a basic glass filler and alumina, a polymerization accelerator (f), and a silane coupling agent (g) represented by the following general formula [I]: (The definitions of the symbols are omitted.

Abstract: A dental restorative curable compositions may have a high mechanical strength and excellent water resistance and polishability in the form of a cured product. A dental composite resin may include such compositions. A dental mill blank may include the cured product of such compositions. A dental restorative curable composition may include: a (meth)acrylic acid ester compound (A) having two or more (meth)acryloyloxy groups per molecule; a mono(meth)acrylic acid ester compound (B); an inorganic filler (C) having an average primary particle diameter of 0.01 to 5 ?m; and a polymerization initiator (D).

Abstract: The present invention provides a zirconia pre-sintered body that enables one visit treatment due to the short firing time and from which a zirconia sintered body having excellent translucency is obtained irrespective of the thickness, and a method for producing the zirconia pre-sintered body. The present invention is a method for producing a zirconia molded body, wherein the zirconia molded body comprises: zirconia; and a stabilizer capable of inhibiting a phase transformation of zirconia, at least a part of the stabilizer is undissolved in zirconia as a solid solution, and the method comprises press molding a mixed powder comprising zirconia and the stabilizer at a pressure of 175 MPa or more to obtain a zirconia molded body.

Abstract: The present invention provides a photocurable resin composition that has good fabricability, and that exhibits superior flexibility, fracture resistance, and water resistance in the form of a cured product.

Abstract: The present invention provides a solvent-free dental adhesive composition exhibiting high initial bond strength and high bond durability to a tooth structure and being substantially free of water and an organic solvent. The present invention relates to a solvent-free dental adhesive composition comprising: an acid group-containing polymerizable monomer (A); a hydrophobic polymerizable monomer (B) having no acid group; and a photopolymerization initiator (C), wherein the photopolymerization initiator (C) comprises at least one selected from the group consisting of a compound (C-1) having a particular structure and a compound (C-2) having a particular structure.

Abstract: A coloring device for coloring a dental prosthesis by an inkjet method, the dental prosthesis coloring device includes an inkjet head having a nozzle that ejects ink droplets; a holding unit that holds the prosthesis; a drive unit that moves the inkjet head or the holding unit in a predetermined direction in an XYZ orthogonal coordinate system; and a control unit that controls the inkjet head and the drive unit, wherein the control unit is configured to control the inkjet head and the drive unit based on predetermined coloring data and three-dimensional data of the prosthesis.

Abstract: A method for manufacturing a mouthpiece includes manufacturing the mouthpiece that is to be placed within an oral cavity to cover teeth by an additive manufacturing device and laminating hardened layers not to form an annular lamination trace in a buccal portion that covers a buccal surface of a front tooth.

Abstract: A zirconia sintered body may excel in translucency, strength, and linear light transmittance with no use of an HIP device, and a zirconia molded body and a zirconia pre-sintered body from which such a zirconia sintered body can be obtained. A zirconia molded body may include zirconia particles with 2.0 to 9.0 mol % yttria, an average primary particle diameter of 60 nm or less, and 0.5 mass % or less zirconia particles having a particle diameter >100 nm, wherein the zirconia molded body has ?L*(W?B) of 5+ through a thickness of 1.5 mm. A zirconia pre-sintered body may include 2.0 to 9.0 mol % yttria, and have a ?L*(W?B) of 5+ through a thickness of 1.5 mm. A zirconia sintered body may include: a fluorescent agent; 2.0 to 9.0 mol % yttria, and have a linear light transmittance of 1% or more through a thickness of 1.0 mm.

Abstract: The present invention provides a dental mill blank having an excellent mechanical strength and an excellent water resistance according to which a decrease in mechanical strength can be suppressed even in an environment where water is present, for example, inside an oral cavity. The present invention relates to a dental mill blank including: a polymer (A); and continuous inorganic fibers (B) that are oriented substantially in one direction, wherein the dental mill blank has a decreasing rate of 40% or less in three-point flexural strength after immersion in 70° C. water for seven days.

Abstract: A dental composition may be suitable for use as a dental composite resin or other dental material, have good ease of handling, and be highly stable in consistency and low in polymerization shrinkage stress while providing desirable mechanical strength and polishability for the cured product. A dental composition may include a polymerizable monomer (A), an inorganic filler (B), a prepolymer (C), and a polymerization initiator (D), the inorganic filler (B) having an average particle diameter of 1 to 20 ?m, and a specific surface area of 10 to 300 m2/g. The prepolymer (C) preferably has a structure derived from the polyfunctional monomer (a). The polyfunctional monomer (a) has a molecular weight of preferably 250 to 1,000.

Abstract: A zirconia sintered body may excel in translucency, strength, in linear light transmittance, and can be produced by short-time sintering without an HIP device, and be used in zirconia molded bodies and pre-sintered bodies from which such a zirconia sintered body can be obtained. A zirconia molded body with zirconia particles and 2.0 to 9.0 mol % yttria, having an average primary particle diameter less than 60 nm, and a monoclinic crystal system in a fraction of ?55%. The zirconia molded body may have ?1% undissolved yttria. A zirconia pre-sintered body may have such zirconia particles, wherein the zirconia pre-sintered body has ?L*(W?B) of ?5 through a thickness of 1.5 mm. A zirconia sintered body may have a fluorescent agent and 2.0 to 9.0 mol % yttria, and a crystal grain size of ?180 nm.