SHOFU INC.

A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes a mixed polymerizable monomer preparing step, a silanation step, a silanated filler preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.

A dental capsule container that can mix a first component and a second component in appropriate proportions. An annular fitting portion extending in a radial direction and a circumferential direction is formed at an end close to the operating portion of the piston portion of the piston member. An annular fitted portion fitted by the annular fitting portion is formed in a state in which the pressing rod portion opens the second discharge port by which the piston member is inserted in the second cylindrical portion of the chamber member in an inner circumferential portion adjacent to the third opening portion of the second cylindrical portion of the chamber member. The shape and dimensions of the annular fitting portion and the annular fitted portion are determined so that the fitting is not released due to an increase in inner pressure of the mixing portion.

A dental curable composition, comprising an (A) polymerizable monomer, a (B) polymerization initiator, and a (C) filler, wherein the (C) component comprises a (C1) inorganic filler having X-ray radiopacity and a (C2) hydrophobized silica fine particle having a primary particle size of less than 0.1 μm, wherein the (C1) component is surface-treated with a hydrophobic silane coupling agent of formula 1, and a mass ratio of the (C1) component and formula 1 ((C1) component:compound of formula 1) is 100:0.01 to 1, wherein flowability, which is a distance moved by the dental curable composition with an elapsed time of one minute after 0.05 g of the dental curable composition is placed in a lump on a horizontally placed slide glass plane, and the slide glass is fixed vertically to the horizontal plane, is 10 mm or more. wherein R 1 is an alkyl group having 1 to 11 carbon atoms, which may have one or more selected from a halogen, an aromatic ring, an aliphatic ring, a polymerizable group, —O—, —S—, —NH—, —C(O)—O—, —O—C(O)—, —C(O)—NH—, —O—C(O)—NH—, or —NH—C(O)—O—, and R 2 , R 3 , and R 4 represent an alkoxy group or an alkyl group having 1 to 4 carbon atoms, or a halogen, and may be the same or different. There is provided a dental curable composition having high flowability while having X-ray radiopacity, as well as favorable operability when placed in a bottle container, and excellent long-term stability.

To provide a composite resin tooth that has excellent fracture resistance capable of withstanding the occlusal pressure in the oral cavity and exhibits good adhesive property to a denture base. To provide a composite resin tooth having a single layer structure or a layer structure of two or more layers, comprising a composite resin layer consisting of a polymerized and cured product of a curable composition including polymerizable monomer (A), organic-inorganic composite filler (B), inorganic fine particle (C) and non-crosslinked polymer particle (D), wherein the content of the non-crosslinked polymer particle (D) in the curable composition is within a range of 1% by mass or more and 5% by mass or less, and an average particle diameter of all of the inorganic particles (C) contained in the curable composition is 1 μm or less.

To provide a dental glass ionomer cement composition that exhibits little stringiness of mixed material, becomes soon after completion of mixing in a state that it is possible to perform shaping operation, is excellent in cavity filling property and is excellent in application property to a dental prosthesis device, and also exhibits excellent mixability and mechanical characteristic. To provide a dental glass ionomer cement composition comprising (a) acid-reactive glass powder, (b) polyalkenoic acid, (c) water, and (d) porous inorganic filler: 0.075% by mass or more and 15% by mass or less, wherein the center portion of the (d) porous inorganic filler is an inorganic particle consisting of only silicon dioxide or consisting of silicon dioxide and an oxide containing one or more metal elements.

A zirconia mill blank for dental cutting and machining which may impart reproducibility of color tone similar to a natural tooth and high strength to a zirconia perfect sintered body without a special sintering method such as HIP treatment. The zirconia mill blank for dental cutting and machining comprises at least two intermediate layers LA and LB which satisfy the Formula (1) and Formula (2) defined herein, and change directions of yttria concentration, alumina concentration and contrast ratio in a stacking direction are not changed by the at least two intermediate layers.

[Problem] A technique for improving translucency in order to prepare a zirconia sintered body having high translucency without using special equipment, has been required. [Solution] To provide A sintering method for a dental zirconia calcined body containing 5.5 mol % to 7.0 mol % of a stabilizer, wherein the method satisfies the following (a) to (c). (a) an average rate of temperature increase in the section from room temperature to 1300° C. is 9° C./min or more. (b) an average rate of temperature increase in the section from 1300° C. to 1400° C. is 0.6° C./min or more and 3° C./min or less. (c) an average rate of temperature increase in the section from 1400° C. to the maximum temperature of the sintering process is 0.5° C./min or more and 2.5° C./min or less.

It is an object of the present invention to provide a photocurable artificial nail composition that suppresses heat pain during curing, suppresses yellowing (including yellowing before curing), and has color tone stability. The photocurable artificial nail composition of the present invention includes a photopolymerization initiator and a polymerizable compound, in which the photopolymerization initiator contains a compound represented by General Formula (1), provided that the photopolymerization initiator does not contain an α-hydroxyalkylphenone photopolymerization initiator, and the composition does not contain a peroxide thermal polymerization initiator, wherein R represents a hydrocarbon group having 1 to 5 carbon atoms.

To provide a dental resin-reinforced glass ionomer cement composition that exhibits little stringiness of kneaded material, becomes soon after completion of kneading in a state that it is possible to perform shaping operation, is excellent in cavity filling property and is excellent in application property to a dental prosthesis device, and also exhibits excellent kneadability and mechanical characteristic. To provide a dental resin-reinforced glass ionomer cement composition comprising, (a) acid-reactive glass powder, (b) polyalkenoic acid, (c) water, (d) polymerizable monomer, (e1) organic-inorganic composite filler and/or (e2) porous organic filler: 1% by mass or more and 30% by mass or less, and (f) polymerization initiator.

To provide a dental resin-reinforced glass ionomer cement composition for luting that can maintain a semi-set state, at which time excess cement can be removed, for a longer period of time, is less likely to tear even when the excess cement is thin, and also has excellent adhesive property to tooth substance, which is an important as basic property of the dental cement To provide a dental resin-reinforced glass ionomer cement composition for luting consisting of a first agent including (a) aryl borate compound and (b) acid-reactive glass powder and a second agent including (c) polyalkenoic acid and (d) water, wherein at least one of the first agent and the second agent contains (e) polymerizable monomer, the content of the (c) polyalkenoic acid contained in the second agent based on the whole of the second agent is more than 20% by mass and less than 70% by mass, and the content of the (c) polyalkenoic acid contained in the second agent in the total of 100 parts by mass of the (c) polyalkenoic acid contained in the second agent and the (d) water contained in the second agent is more than 45 parts by mass and less than 75 parts by mass.