Radically polymerizable dental material, which contains at least one ABA or AB block copolymer, preferably at least one monofunctional, radically polymerizable monomer (a) and preferably at least one radically polymerizable urethane di(meth)acrylate telechel (b).

What is described is a milling blank having a continuous shade gradient for production of an indirect dental restoration, composed of resin or a resin-based composite. What is also described is a method of producing such a milling blank by mixing two differently coloured pastes with continuous variation of the mixing ratio of the two pastes during the dispensing operation.

What is described is a milling blank having a continuous shade gradient for production of an indirect dental restoration, composed of resin or a resin-based composite. What is also described is a method of producing such a milling blank by mixing two differently coloured pastes with continuous variation of the mixing ratio of the two pastes during the dispensing operation.

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).

A dental restoration apparatus that eliminates time-consuming, labor-intensive steps conventionally needed to fabricate molds, and thereby facilitates dental restorations in a shorter time, while reducing the discomfort and embarrassment sometimes associated with provisional restorations, which includes an additive manufacturing apparatus (e.g., a 3-D printer) having a tool head (e.g., a print head) and a fixture for controlling the position of the tool head relative to the teeth of a patient, allowing fabrication of a planned dental structure directly on an existing dental structure.

A photocurable composition includes a photopolymerizable component and a photopolymerization initiator. In a case in which a rectangular sheet-like test piece is produced by photomodeling under conditions in which the photocurable composition is irradiated with visible light having a wavelength of 405 nm at an irradiation dose of 12 mJ/cm.sup.2 to form a cured layer with a thickness of 50 .Math.m, the cured layer is stacked in a thickness direction thereof to form a rectangular sheet-like modeling product with a length of 40 mm, a width of 10 mm, and a thickness of 1 mm, and the modeling product is irradiated with ultraviolet rays having a wavelength of 365 nm at an irradiation dose of 10 J/cm.sup.2 to produce the test piece, the test piece has an X-ray absorption coefficient of from 9.0 cm.sup.-1 to 34.0 cm.sup.-1.

A photocurable composition includes a photopolymerizable component and a photopolymerization initiator. In a case in which a rectangular sheet-like test piece is produced by photomodeling under conditions in which the photocurable composition is irradiated with visible light having a wavelength of 405 nm at an irradiation dose of 12 mJ/cm.sup.2 to form a cured layer with a thickness of 50 .Math.m, the cured layer is stacked in a thickness direction thereof to form a rectangular sheet-like modeling product with a length of 40 mm, a width of 10 mm, and a thickness of 1 mm, and the modeling product is irradiated with ultraviolet rays having a wavelength of 365 nm at an irradiation dose of 10 J/cm.sup.2 to produce the test piece, the test piece has an X-ray absorption coefficient of from 9.0 cm.sup.-1 to 34.0 cm.sup.-1.

A dental blank for the manufacture of a dental restoration. The dental blank comprises a dental block and an insert with an opening facing toward an outer surface of the dental blank. The insert comprises at least one positioning element for the positioning of an abutment.

A method of producing a dental prosthesis produced from a gum part, and prosthetic teeth arranged on the gum part and connected to the gum part. The surface of the dental prosthesis is surface-treated, the surface treatment of the dental prosthesis involving a solvent, and the solvent containing at least one chlorohydrocarbon and at least one methane nitroderivative.

A method of producing a dental prosthesis produced from a gum part, and prosthetic teeth arranged on the gum part and connected to the gum part. The surface of the dental prosthesis is surface-treated, the surface treatment of the dental prosthesis involving a solvent, and the solvent containing at least one chlorohydrocarbon and at least one methane nitroderivative.