Abstract: A blank (1) for producing a dental element, wherein the blank (1) has a cylindrical base body (5) with a cover surface (7), a bottom surface (8) and an outer surface (20), wherein there is inserted into the outer surface (20) at least one positioning groove (4), wherein there are provided a first receiving member and a spaced-apart second receiving member, wherein each receiving member has at least one groove (21), which is arranged laterally in the outer surface (20), wherein the groove (21) runs from the bottom surface (8) in the direction of the cover surface (7) and has a length (h3+h/2), which is smaller than the height (h) of the base body (5), wherein the groove (21) has a support surface (3) at the upper end, wherein there is provided a depression (2) in the support surface (3), which extends in the direction of the cover surface (7).

Abstract: 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.

Abstract: A retaining device for a dental workpiece includes a retaining ring for receiving the dental workpiece, and a clamping device for clamping the dental workpiece on the retaining ring. The clamping device has a bearing surface for the dental workpiece, and the bearing surface is mounted or formed on the retaining ring and protrudes radially in the direction of the central axis. At least one clamping element is mounted movably on the retaining ring, and in a clamping position, the dental workpiece can be clamped between the clamping element and the bearing surface. The retaining ring has an inner ring element, on which the bearing surface is mounted or formed and on which the clamping element is movably mounted, an outer ring element, and a fixing device for releasably fixing the inner ring element to the outer ring element.

Abstract: 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.

Abstract: A processing machine for the production of a dental workpiece from a blank, includes a housing in which a first chamber and a second chamber are arranged, in which the second chamber is separate from the first chamber. A first holding device for holding a blank is provided, and the first holding device is arranged in the first chamber and is movable relative to the housing. A second holding device for holding a blank is provided, and the second holding device is arranged in the second chamber and is movable relative to the housing. A processing device is movable relative to the housing, and a blank held in the first holding device and a blank held in the second holding device can be processed by the processing device.

Abstract: A blank, in particular a dental blank, for the production of a tooth prosthesis, includes a bed of a first material, and at least one core region which is embedded in the bed and which has a different color from the bed and includes a second material. The core region has a surface directed in the direction of the bed, and a boundary layer delimiting the bed relative to the surface of the core region is directed in the direction of the bed. The boundary layer simulates a dentine boundary between a dental enamel and a dentine, and the blank has at least two separate core regions with separate surfaces directed in the direction of the bed.

Abstract: A holding apparatus for an in particular dental workpiece includes a holding element and a fixing device. The workpiece can be fixed to the holding apparatus by a relative movement of the fixing device with respect to the holding element. The fixing device or the holding element has a split sleeve, and the inside surface of the split sleeve forms a clamping surface for the workpiece. Upon the relative movement of the fixing device with respect to the holding element, the workpiece can be braced against the holding device by the clamping surface.

Abstract: A processing machine for the production of a dental workpiece from a blank, comprising a housing in which a first chamber and a second chamber are arranged, the second chamber being separate from the first chamber, a first holding device for a blank, the first holding device being arranged in the first chamber and being movable relative to the housing, a second holding device for a blank, the second holding device being arranged in the second chamber and being movable relative to the housing, and a processing device being movable relative to the housing, wherein a blank held in the first holding device and a blank held in the second holding device can be processed by the processing device.

Abstract: An axially elongate dental machining portion includes a machining region machinable by a dental machining device, and a fixing region for fixing the axially elongate dental machining portion to a holder of the dental machining device. In the fixing region is a fixing projection oriented transversely relative to a longitudinal axis. In a condition of the machining portion being mounted in the holder, the fixing projection bears against a holding nose positioned in complementary relationship on the holder. The machining region has a machinable surface which has a maximum spacing relative to the longitudinal axis, measured normal to the longitudinal axis, and the fixing projection has a maximum spacing relative to the longitudinal axis, measured normal relative to the longitudinal axis, that is greater than the maximum spacing of the machinable surface relative to the longitudinal axis.

Abstract: Disclosed is a method for producing a molded blank from metal powder using a gel-casting process, wherein a starting mixture for the gel-based process is made by mixing the metal powder with a liquid and a binder, the starting mixture being thoroughly mixed in a vacuum.

Abstract: A blank for the production of a dental element includes a first side, a second side and at least one main holding surface for holding the blank at a holding device. The holding surface is spaced from the second side, and the blank has a standard holding thickness between the main holding surface and the second side. The blank includes at least one auxiliary holding surface for holding the blank at a holding device, and the auxiliary holding surface is spaced from the second side. The blank has a non-standard holding thickness between the at least one auxiliary holding surface and the second side, and the standard holding thickness is larger than the non-standard holding thickness.

Abstract: A blank, in particular a dental blank, for the production of a tooth prosthesis, comprising a bed of a first material, and at least one core region which is embedded in the bed and which is of a different color from the bed and comprises a second material, wherein the core region has a surface directed in the direction of the bed, and a boundary layer delimiting the bed relative to the surface of the core region, that is directed in the direction of the bed, wherein the boundary layer simulates a dentine boundary between a dental enamel and a dentine, wherein the blank has at least two separate core regions with separate surfaces directed in the direction of the bed.

Abstract: A holding apparatus for an in particular dental workpiece comprising a holding element and a fixing device, wherein the workpiece can be fixed to the holding apparatus by a relative movement of the fixing device with respect to the holding element, wherein the fixing device or the holding element has a split sleeve, wherein the inside surface of the split sleeve forms a clamping surface for the workpiece and wherein upon the relative movement of the fixing device with respect to the holding element the workpiece can be braced against the holding device by way of the clamping surface.

Abstract: A machining apparatus for grinding, milling, polishing or the like of a dental workpiece. The machining apparatus contains a machining tool, a housing to which the machining tool is mounted rotatably about an axis of rotation relative to the housing, and a holding device to which the housing is fixed. The housing is mounted yieldingly movably to the holding device in dependence on forces exerted on the machining tool.

Abstract: An axially elongate dental machining portion includes a machining region machinable by a dental machining device, and a fixing region for fixing the machining portion to a holder of the machining device. In the fixing region is a fixing projection oriented transversely relative to the longitudinal axis. In a condition of the machining portion mounted in the holder, the fixing projection bears against a holding nose provided in complementary relationship on the holder. The machining region has a machinable surface which has a maximum spacing relative to the longitudinal axis, measured normal to the longitudinal axis, and the fixing projection has a maximum spacing relative to the longitudinal axis, measured normal relative to the longitudinal axis, that is greater than the maximum spacing of the surface relative to the longitudinal axis.

Abstract: A machining apparatus for grinding, milling, polishing or the like of a dental workpiece. The machining apparatus contains a machining tool, a housing to which the machining tool is mounted rotatably about an axis of rotation relative to the housing, and a holding device to which the housing is fixed. The housing is mounted yieldingly movably to the holding device in dependence on forces exerted on the machining tool.

Abstract: A computer-controlled machining center, particularly a CAD/CAM cutting device for dental technology applications, includes a clamping device with a displaceably supported holding device on which a carrier plate for receiving a molded blank is supported. The carrier plate is formed with at least one passage opening to accommodate the molded blank pivotally about a pivot axis (a) that is substantially parallel to the main plane of the carrier plate. A clamping assembly allows the shaping blank to be mounted in the through opening rotatably about an axis of rotation (b) that extends parallel to the main plane of the carrier plate and encloses a given angle, preferably 90°, with the pivot axis (a) of the carrier plate.

Abstract: A computer-controlled machining center, particularly a CAD/CAM cutting device for dental technology applications, includes a clamping device with a displaceably supported holding device on which a carrier plate for receiving a molded blank is supported. The carrier plate is formed with at least one passage opening to accommodate the molded blank pivotally about a pivot axis (a) that is substantially parallel to the main plane of the carrier plate. A clamping assembly allows the shaping blank to be mounted in the through opening rotatably about an axis of rotation (b) that extends parallel to the main plane of the carrier plate and encloses a given angle, preferably 90°, with the pivot axis (a) of the carrier plate.

Abstract: A device producing a computer-processable, three-dimensional image of a dental model includes a scanner that generates scanned data and an electronic memory unit, wherein the scanned data of the dental model that are captured by the scanner in a scanning area are stored. The device has a positioning area in which a temporomandibular joint movement simulator, preferably an articulator, with dental model halves of the dental model arranged therein can be arranged such that at least sections of the TMJ movement simulator can be housed or are housed in the scanning area of the scanner.

Abstract: Disclosed is a support plate for a particularly manually actuated duplicating milling apparatus. The support plate contains at least one through-hole in which a blank and a solid model are or can be disposed by one respective substantially disk-shaped retaining element. The retaining elements for the blank and the solid model are or can be arranged in the at least one through-hole so as to be pivotable about at least one substantially horizontal axis of rotation.