Abstract: A dental treatment device with an energy source is provided which is arranged at least partially in or on a working chamber, comprising a stamp which is movable in relation to the dental treatment device as for the rest and which comprises a receiving plate for dental restoration parts. It is provided that the working chamber has a through-opening at the top, into which the receiving plate (16) is at least partially movable. Further, a drive is provided for the transfer of the stamp from a working position into a presentation position, and optionally vice versa. A cover (32) is mounted, in particular hinged, on the dental treatment device as for the rest, by which cover the through-opening (26) is closable.

Abstract: The invention relates to a material for use as construction material for energy-pulse-induced transfer printing, which contains (a) at least one polymerizable binder, (b) at least one volume expansion component, (c) at least one initiator for the polymerization and (d) preferably at least one energy transformation component. The invention furthermore relates to a process for producing three-dimensional objects using the material.

Abstract: A partial dental arch is provided with dentin material and with cutting material and a boundary area therebetween. It includes a primary-position tooth region and additional tooth regions which are arranged more distally. A wavy structure of the boundary area is provided whose amplitude—when viewed in the distal direction—decreases in at least one section of the mesial-distal and/or occlusal-gingival extension, in particular with regard to the occlusal-gingival direction.

Abstract: Radically polymerizable dental material which contains at least one compound of Formulae I to III: The material preferably additionally contains a radically polymerizable monomer, an initiator for the radical polymerization and filler. It is characterized in particular by a low polymerization contraction stress.

Abstract: The invention relates to a polymerization and post-tempering device (10) for tempering, in particular post-tempering, dental restoration parts (54) made of polymerizable plastics. At least one light source (38) which emits light in the visible and/or ultraviolet wavelength range and a light chamber with a door (14) to the light chamber are provided. The door (14) comprises a window (20) with a window pane (22) which consists of at least two layers (56, 58) whose layer facing the light chamber reflects at least 90%, in particular approximately 95%, of light, and whose layer facing away from the light chamber filters out UV light and/or blue light.

Abstract: The present invention relates to a method and device for layer-wise instruction of a shaped body by stereolithography in subsequent layers.

Abstract: The present invention relates to particles comprising a core, in particular a magnetic core, and a first coating of a first shell material, wherein a second coating of a second shell material is applied to the surface of the first coating facing away from the core, the second shell material is different from the first shell material and has a higher refractive index than the first shell material.

Abstract: The invention relates to a process for producing a dental restoration part using a machine tool (10), especially a dental processing machine intended for a dentist's office, wherein, in a first step, a rotating processing tool (16) rotationally mills or processes or grinds a workpiece (18) while, except from at least one entry and/or exit path, it is in continuous contact with the workpiece (18), i.e. with 0% air battle, by machining the outer profile (19) of the workpiece (18) substantially completely in helical-shape. The invention also relates to a dental processing machine.

Abstract: The invention relates to a process for the preparation of a glass-ceramic blank for dental purposes with lithium silicate as crystal phase, in which lithium silicate blanks that are no longer required and in particular residues thereof are used as starting material and which allows the production of a homogeneous starting glass within a short time.

Abstract: The present invention relates to a building platform (100) for building up a workpiece (200) in layers or continuously by stereolithography, comprising: a rear illumination device (101-1) for illuminating a layer (103-n) from a rear side; a photosensor (105) for detecting a light intensity of a light from a front illumination device (101-2) through the layer (103-n) and/or a material and/or a deflecting mirror; and a control device (107) for activating the rear illumination device (101-1) when the detected light intensity of the front illumination device (101-2) is above a predetermined threshold.

Abstract: A dental prosthesis is provided, manufactured from a monobloc or multibloc prosthesis blank (10), which is composed of a gum-colored material (14) and a tooth-colored material (12), which materials (12, 14) are bonded to each other by bonding, polymerization and/or one-piece manufacture. The boundary surface (16) between the materials is wave-shaped comprising alternating grooves (22) and ribs (24) in the course of the dental arch, and radial in an oral-vestibular direction in the region of the anterior teeth (33) to be created. The boundary surface (16), at least in the region of the molars (26)—again as viewed in the oral vestibular direction—has parallel grooves (22) and ribs (24) forming troughs and crests of the waveform, or grooves (22) and ribs (24) such that they extend in deviation from parallel by at most 10 degrees, in particular at most 5 degrees, at least in the region of the molars (26).

Abstract: The invention relates to a single- or multi-unit dental restoration, which consists of a support structure and a veneer, which support structure is in particular made from oxide ceramics by means of additive manufacturing, particularly preferably by means of rapid prototyping, wherein the veneer is produced by pressing a ceramic material, such as a glass ceramic or composite material, which is more translucent than the support structure, characterized in that the veneer fills and/or penetrates recesses of the support structure (12) configured as a net or frame structure or as a reinforcement, wherein it is particularly provided that the recesses penetrate through the support structure (12).

Abstract: The present invention relates to a computer implemented method for aligning a three-dimensional model (6) of a patient's dentition to an image of the face of the patient recorded by a camera (3), the image including the mouth opening, comprising: estimating the positioning of the camera (3) relative to the face of the patient during recording of the image to obtain an estimated positioning, retrieving the three-dimensional model (6) of the dentition of the patient, rendering a two-dimensional image (7) of the dentition of the patient using the virtual camera (8) processing the three-dimensional model (6) of the dentition at the estimated positioning, carrying out feature detection in a dentition area in the mouth opening of the image (1) of the patient recorded by the camera (3) and in the rendered image (7) by performing edge detection and/or a color-based tooth likelihood determination in the respective images and forming a detected feature image for the or each detected feature, calculating a measure of

Abstract: The invention relates to a light curing appliance, in particular a dental light curing appliance (10), with a light source and with a light emission element such as an optical waveguide (12), of which the light output end is intended in particular to be directed towards a material that is to be polymerized. It is provided with one or more control devices (16) for switching on the light source during a polymerization cycle, and with one or more sensors (20) or sensor combinations connected to the control devices (16). The sensor (20) is designed as a location sensor and/or as a motion sensor (20) which detects a movement of the light curing appliance (10), designed as a hand-held appliance, and sends signals reproducing the motion to the control devices (16).

Abstract: A dental multi-colored milling blank having at least two layers (16), a transition zone, where material from both layers is present. In the transition zone, a transition geometry exists that extends three-dimensionally. The transition geometry comprises round surfaces facing towards both directions of extension of the layers.

Abstract: The invention relates to a plausibility checking method for rapid prototyping devices, in particular for stereolithography devices. In this connection, input data (14) is checked which is present particularly in the form of graphics data and of which every file renders a layer. Every layer comprises a plurality of pixels. The component to be printed in the respective layer is produced based on output data by the rapid prototyping device. The input data of two consecutive layers is checked and the sum of all pixels to be exposed is determined for every layer. A signal (22) is output in particular as a warning signal (26) when the pixel sum of a following layer is larger than in the previous layer by a predetermined factor.

Abstract: The invention is directed to a light curing device, in particular for dental restoration materials, having a light source and a control device for the light curing device, which control device is capable of switching on the light source at different levels of power. The light curing device includes an actuation element which can be used to switch on the light curing device upon actuation by the user at a reduced dosage of light for pre-curing the dental restoration material. The control device in particular signalizes the reduced dosage.

Abstract: Modelling material which includes (a) at least one radically polymerizable monomer, (b) at least one initiator for the radical polymerization and (c) at least one inert component. The inert component (c) is soluble in the polymer formed by polymerization of the monomer (a), wherein the solubility of component (c) decreases as the temperature increases, with the result that a phase separation takes place above a particular temperature. The material is suitable in particular for the production of models of dental restorations for investment casting processes.

Abstract: The invention relates to a recording device (10) comprising a scan head carrier (18) for moving the scan head (20) across a scan area (42) of a cavity, the scan area (42) extending around the scan head (20). The scan head guide (18) passes through the cavity towards the scan head (20). In particular, a control device (44) determines the shape of the cavity (40). A second extraoral scanning head (43) scans extraoral areas.

Abstract: The present invention is directed to a method and a device for building a shaped body by stereolithographic solidification of building material by photopolymerization.