Abstract: Component carrier for an additive manufacturing device, wherein the component carrier comprises a construction surface, on which a component to be manufactured is disposed during the operation of the manufacturing device, wherein the component carrier comprises a sealing surface which radially surrounds the construction surface, and method for post-processing a component manufactured according to an additive manufacturing process using such a component carrier.

Abstract: Material unit for an additive manufacturing device (AM) having a resin vat, wherein the resin vat comprises a base which is transparent at least in sections, wherein the resin vat is connected to a holder for a reservoir, and wherein the holder is configured such that resin (R) emerging from an outlet of a reservoir held by said holder can flow into the resin vat.

Abstract: Device for a system for layer-by-layer construction of a body (K) from a substance (S) which can be hardened by radiation, comprising a vat having a vat base for receiving the substance (S) which can be hardened by radiation, comprising a building platform which is arranged above the vat base and which is height-adjustable in relation to the vat base and comprising a sensor cooperating with the vat base, wherein the vat base is configured to be at least partially flexible, wherein a chamber is provided wherein the chamber is delimited by an underside of the vat base, wherein the sensor is adapted to detect a volume change of the chamber and to provide a sensor signal from which a sign of the volume change can be determined.

Abstract: A stereolithography apparatus (1) for generating a three-dimensional object (2) from a photocurable substance (3), comprising: a vat (4) for storing the photocurable substance (3); and a platform (5) for supporting the three-dimensional object (2), wherein the platform (5) is movable relative to the vat (4); an optical unit (6) for sequentially projecting layered images towards the photocurable substance (3) for hardening the photocurable substance (3) deposited between the three-dimensional object (2) and the bottom of the vat (4); further comprising: an oscillation unit (7) adapted to horizontally oscillate the vat (4) concomitantly with the projection of the layered images with a substantially constant amplitude that is smaller than the pixel size of the layered images in the horizontal direction for preventing adhesion of the three-dimensional object (2) to the bottom of the vat (4).

Abstract: Component carrier for an additive manufacturing device, wherein the component carrier comprises a construction surface, on which a component to be manufactured is disposed during the operation of the manufacturing device, wherein the component carrier comprises a sealing surface which radially surrounds the construction surface, and method for post-processing a component manufactured according to an additive manufacturing process using such a component carrier.

Abstract: Material unit for an additive manufacturing device (AM) having a resin vat, wherein the resin vat comprises a base which is transparent at least in sections, wherein the resin vat is connected to a holder for a reservoir, and wherein the holder is configured such that resin (R) emerging from an outlet of a reservoir held by said holder can flow into the resin vat.

Abstract: The invention relates to a disk-shaped blank made of a final-strength dental ceramic, comprising a casing surrounding a perimeter of the final-strength dental ceramic, the casing made of a material that is softer than the final-strength ceramic, and in particular made of wood or plastic material.

Abstract: Device (1) for a system for layer-by-layer construction of a body (K) from a substance (S) which can be hardened by radiation, comprising a vat (3) having a vat base (2) for receiving the substance (S) which can be hardened by radiation, comprising a building platform (4) which is arranged above the vat base (2) and which is height-adjustable in relation to the vat base (2) and comprising a sensor (5) cooperating with the vat base (2), wherein the vat base (2) is configured to be at least partially flexible, wherein a chamber (6) is provided wherein the chamber (6) is delimited by an underside of the vat base (2), wherein the sensor (5) is adapted to detect a volume change of the chamber (6) and to provide a sensor signal from which a sign of the volume change can be determined.

Abstract: The invention relates to a method for producing ceramic dental prosthesis parts by way of a CAD/CAM machining station, comprising the following steps:—providing a disk-shaped ceramic blank, wherein the blank has the final strength;—attaching the blank in a mounting device of the CAD/CAM machining station;—controlling the CAD/CAM machining station for establishing an initial contact between the blank and the grinding tool in such a way that, due to the rotation of the grinding tool about the longitudinal axis (13) thereof, the entire contact surface (21) between the grinding tool and the blank has relative movement; and—machining the blank by way of the rotating grinding tool, proceeding from the initial contact, to produce the ceramic dental prosthesis parts.

Abstract: The present invention relates to dental machining apparatus (1) for blanks (3) comprising a tool spindle (2) having an axis of rotation (2.8) and mounted in a bearing housing (1.2) disposed on the machine housing side. A force sensor (5) is also provided, which is disposed between the tool spindle (2) and the bearing housing (1.2) for the purpose of detecting the machining force acting on the tool spindle (2), wherein the tool spindle (2) can be supported against the bearing housing (1.2) directly or indirectly via the force sensor (5).

Abstract: A dental machining device (1) having at least one shaft (2) which projects into a machining chamber (4) and is displaceable in both axial and radial directions includes a sealing element (7) having at least two axially spaced sealing lips (8, 9) bearing against the shaft (2) in its peripheral direction and enclosing an annular chamber (10) with the shaft (2). At least one fluid conduit (11) opens into the annular chamber (10) to supply a fluid (16) thereto. A pressure sensor (14) is provided for detecting a state variable of the fluid, which is detected and held ready for transmission to a control unit (14?).

Abstract: The invention relates to dental machining device (1) having at least one shaft (2) which projects into a machining chamber (4) and is displaceable in both axial and radial directions, and having a sealing element (7) for sealing the shaft (2), wherein the sealing element (7) exhibits at least two axially spaced sealing lips (8, 9) bearing against the shaft (2) in its peripheral direction and enclosing an annular chamber (10) with the shaft (2), at least one fluid conduit (11) opening into the annular chamber (10) to supply a fluid (16) thereto, and means (14) for detecting a state variable of the fluid. The invention further relates to a method for monitoring such sealing elements, by means of which a state variable of the fluid (16) is detected and held ready for transmission to a control unit (14?).

Abstract: The present invention relates to dental machining apparatus (1) for blanks (3) comprising a tool spindle (2) having an axis of rotation (2.8) and mounted in a bearing housing (1.2) disposed on the machine housing side. A force sensor (5) is also provided, which is disposed between the tool spindle (2) and the bearing housing (1.2) for the purpose of detecting the machining force acting on the tool spindle (2), wherein the tool spindle (2) can be supported against the bearing housing (1.2) directly or indirectly via the force sensor (5).

Abstract: An apparatus for recording medical objects, in particular for recording models of prepared teeth, comprising a position-sensitive sensor (2), which is movable in the projection direction, with a projection unit and a receiving unit (13-15; 18-21), and with a certain triangulation angle (&agr;) located between the projection path of the rays (10) of the projection unit (13-15) and the observation path of the rays (11) of the receiving unit (18-21), and with the projection path of the rays (10) aligned parallel to the direction of movement of the sensor (2), is realized for the accurate recording action of edges and steep surfaces of the type that occur in tooth cavities with a triangulation angle (&agr;) that is smaller than 10°, preferably smaller than 5°.

Abstract: Holding device for aligning and mounting a workpiece in an apparatus includes a receiving opening (6) provided for the holding device (20; 30), means (7) for positioning the holding device disposed in the receiving opening (6) for determination of the position of the holding device in relation to the receiving opening, wherein the holding device (20; 30) is connected with a workpiece carrier (21; 31), wherein the workpiece carrier (21; 31) is adjustable relative to the holding device, and wherein optical means (8; 11-17) are provided for viewing of the workpiece and thereby alignment of the workpiece on the holding device is performed.