Abstract: The present invention provides a dental mill blank having reduced cracks and that excels in mechanical strength and aesthetic quality. The present invention relates to a dental mill blank comprising an inorganic filler and a polymer, and having a porosity of 25 to 35 volume % after 2-hour ashing at 600° C. In the dental mill blank, the inorganic filler preferably comprises an inorganic filler (A) and an inorganic filler (B), and the dental mill blank preferably satisfies the following formulae (I) and (II), 0.12?a?0.70??(I) 3?b/a??(II), where a is an average primary particle diameter of the inorganic filler (A) in micrometers, and b is an average primary particle diameter of the inorganic filler (B) in micrometers. Preferably, the inorganic filler (A) and the inorganic filler (B) have a volume-to-volume content ratio (A)/(B) of 5/95 to 50/50.

Abstract: The present invention relates to providing a dental curable composition that, when cured, has high metal ion release ability and highly durable physical properties. The dental curable composition of the present invention includes: a sugar compound having an —XM group, where —X is an acid anion group and M is a metal cation; and a curable component.

Abstract: A method for producing a dental mill blank, characterized in that the method includes contacting an inorganic filler molded article produced by subjecting an inorganic filler to press molding and a polymerizable monomer-containing composition, and allowing the polymerizable monomer to polymerize and cure. When the method of the present invention is used, a dental mill blank having a high inorganic powder content and excellent mechanical strength is obtained. In addition, the dental mill blank obtained is suitably used in the fabrication of a dental prosthesis having high mechanical strength and excellent gloss retention, by machining a mill blank using a CAD/CAM system.

Abstract: The present invention provides a dental curable composition suitable as a flowable composite resin. The dental curable composition, when in the form of a cured product, has excellent mechanical strength, polishability, and gloss retention, and, when in the form of a paste, has consistency appropriate for discharge through a needle attached to the tip of a syringe and exhibits good formability and handling properties after discharge through the needle. The present invention is a dental curable composition including: a polymerizable monomer (A); irregularly-shaped inorganic particles (B) having an average particle diameter of 0.1 to 0.3 ?m and surface-treated with a silane coupling agent having a particular structure; and inorganic ultrafine particles (C) having an average particle diameter of 5 to 50 nm and surface-treated with a silane coupling agent having a particular structure, the dental curable composition containing 92.5 to 98 weight % of the irregularly-shaped inorganic particles (B) and 2 to 7.

Abstract: The present invention relates to providing a dental curable composition that, when cured, has high metal ion release ability and highly durable physical properties. The dental curable composition of the present invention includes: a sugar compound having an —XM group, where —X is an acid anion group and M is a metal cation; and a curable component.

Abstract: The present invention provides a dental curable composition suitable as a flowable composite resin. The dental curable composition, when in the form of a cured product, has excellent mechanical strength, polishability, and gloss retention, and, when in the form of a paste, has consistency appropriate for discharge through a needle attached to the tip of a syringe and exhibits good formability and handling properties after discharge through the needle. The present invention is a dental curable composition including: a polymerizable monomer (A); irregularly-shaped inorganic particles (B) having an average particle diameter of 0.1 to 0.3 ?m and surface-treated with a silane coupling agent having a particular structure; and inorganic ultrafine particles (C) having an average particle diameter of 5 to 50 nm and surface-treated with a silane coupling agent having a particular structure, the dental curable composition containing 92.5 to 98 weight % of the irregularly-shaped inorganic particles (B) and 2 to 7.

Abstract: A method for producing a dental mill blank, characterized in that the method includes contacting an inorganic filler molded article produced by subjecting an inorganic filler to press molding and a polymerizable monomer-containing composition, and allowing the polymerizable monomer to polymerize and cure. When the method of the present invention is used, a dental mill blank having a high inorganic powder content and excellent mechanical strength is obtained. In addition, the dental mill blank obtained is suitably used in the fabrication of a dental prosthesis having high mechanical strength and excellent gloss retention, by machining a mill blank using a CAD/CAM system.

Abstract: A dental composition for oral use, containing a phosphorylated saccharide (a), a polyphosphoric acid and/or a salt thereof (b), and a cationic bactericidal agent (c), wherein a ratio of a total amount of the phosphorylated saccharide (a) and the polyphosphoric acid and/or a salt thereof (b) contained to an amount of the cationic bactericidal agent (c) contained, i.e. {(a)+(b)}/(c), is from 0.05 to 20 in a weight ratio.

Abstract: A dental composition for oral use, containing a phosphorylated saccharide (a), a cationic bactericidal agent (b) and a solvent (c). By using the dental composition for oral use of the present invention, the adhesion of the bacteria in the oral cavity to the surfaces of the teeth can be suppressed for a long period of time; therefore, the dental composition for oral use can be suitably used for, for example, a mouse-wash agent, a dentifrice agent, a gargling agent, a mouse spray, a coating agent or a bonding agent to tooth surface or a dental prosthetic, a hypersensitive inhibitor, a therapeutic agent for periodontal diseases, that is applied to a periodontal pocket, or the like.

Abstract: The present invention provides a composition suitable for a dental composition. The present invention is a composition containing: a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups; and a polymerizable monomer (B) having one polymerizable group and at least one hydroxyl group. When a suitable component is added to this composition, the resultant composition can be used suitably for dental materials such as a primer, bonding material, composite resin, and cement.

Abstract: The present invention provides a polymerizable composition that exhibits high photocurability not only in the case of using a halogen lamp-curing unit but also in the case of using an LED light-curing unit, hardly has discoloration even when stored for a long time, and when applied to a dental material, a cured product of which has high bond strength to a tooth structure. The present invention is a polymerizable composition including: a photopolymerization initiator composition containing a photopolymerization initiator component consisting of only a bisacylphosphine oxide (A) and ?-diketone (B), and tertiary amine (C); and a polymerizable monomer (D). A weight ratio (A):(B) between the bisacylphosphine oxide (A) and the ?-diketone (B) is 1:9 to 9:1, and a weight ratio (D):(C) between the polymerizable monomer (D) and the tertiary amine (C) is 100:0.5 to 100:10.

Abstract: A dental composition for oral use, containing a phosphorylated saccharide (a), a polyphosphoric acid and/or a salt thereof (b), and a cationic bactericidal agent (c), wherein a ratio of a total amount of the phosphorylated saccharide (a) and the polyphosphoric acid and/or a salt thereof (b) contained to an amount of the cationic bactericidal agent (c) contained, i.e. {(a)+(b)}/(c), is from 0.05 to 20 in a weight ratio.

Abstract: A dental composition for oral use, containing a phosphorylated saccharide (a), a cationic bactericidal agent (b) and a solvent (c). By using the dental composition for oral use of the present invention, the adhesion of the bacteria in the oral cavity to the surfaces of the teeth can be suppressed for a long period of time; therefore, the dental composition for oral use can be suitably used for, for example, a mouse-wash agent, a dentifrice agent, a gargling agent, a mouse spray, a coating agent or a bonding agent to tooth surface or a dental prosthetic, a hypersensitive inhibitor, a therapeutic agent for periodontal diseases, that is applied to a periodontal pocket, or the like.

Abstract: The present invention provides a polymerizable composition that exhibits excellent adhesive properties to a tooth structure (particularly dentin) when applied as a dental material, and a polymerizable monomer that is used as a component of the polymerizable composition. The present invention is a polymerizable monomer (A) that is a compound having at least two polymerizable groups. The polymerizable monomer (A) has a retention time of 7 minutes to 30 minutes in a high-performance liquid chromatography (HPLC) measurement conducted under a condition in which a column with an inner diameter of 3.9 mm and a length of 300 mm, packed with a C18 packing material having been crushed to have an average particle size of 10 ?m and a pore size of 125 angstroms, is used, an eluent is a mixed solvent of methanol and water contained at a ratio of 3:7, a flow rate is 1.0 mL/minute, a measurement temperature is 50° C.

Abstract: The present invention provides a composition suitable for a dental composition. The present invention is a composition containing: a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups; and a water (B). The composition contains 6 to 2000 parts by weight of the water (B) with respect to 100 parts by weight of the whole amount of polymerizable monomer components. When suitable components are added to this composition, the resultant composition can be used suitably for dental materials such as a primer, bonding material, composite resin, and cement.

Abstract: The present invention provides a composition that exhibits excellent adhesive properties to tooth structure (particularly dentin) when applied as a dental material. The present invention is a composition containing a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups, and a bisacylphosphine oxide (B) represented by the following formula (1): where the respective symbols are as defined in the specification.

Abstract: The present invention provides a composition suitable for a dental composition. The present invention is a composition containing: a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups; and a polymerizable monomer (B) having one polymerizable group and at least one hydroxyl group. When a suitable component is added to this composition, the resultant composition can be used suitably for dental materials such as a primer, bonding material, composite resin, and cement.

Abstract: According to the present invention, a method of producing ethers, which includes subjecting a conjugated diene compound and an alcohol to a telomerization reaction in the presence of a composition containing a palladium compound, an isocyanide represented by the formula (I) R1R2R3CNC ??(I) and a base represented by the formula (II) M(OR4)n ??(II) as a catalyst is provided. According to the method of the present invention, by telomerization reaction of a conjugated diene compound and an alcohol, ethers can be produced industrially advantageously. (In the above-mentioned formulas, each symbol is as defined in the specification.

Abstract: According to the present invention, a method of producing ethers, which includes subjecting a conjugated diene compound and an alcohol to a telomerization reaction in the presence of a composition containing a palladium compound, an isocyanide represented by the formula (I) R1R2R3CNC ??(I) and a base represented by the formula (II) M(OR4)n ??(II) as a catalyst is provided. According to the method of the present invention, by telomerization reaction of a conjugated diene compound and an alcohol, ethers can be produced industrially advantageously. (In the above-mentioned formulas, each symbol is as defined in the specification.