Abstract: The invention relates to a server for sending and receiving data, in particular for an order control of production orders, wherein the server is adapted to establish a data connection with a plurality of order computers arranged distanced from the server at an orderer location and to receive an order data package containing geometric anatomy information, in particular about a digital dental impression of a patient and address information about the order computer, from each one of these order computers.

Abstract: The invention relates to a stereolithography apparatus comprising: a container for a fluid material curable by radiation, a substrate plate, an actuator means for generating a relative movement between the container and the substrate plate, and an irradiation device for selectively irradiating the material arranged in the container. According to the invention, the actuator means and the irradiation device are mounted on a frame assembly, and the container and the substrate plate are combined to form an assembly and the assembly consisting of the container and the substrate plate is jointly inserted into the frame assembly, detachably secured therein by means of an attachment means and to be jointly removed from the frame assembly.

Abstract: A post-exposure apparatus is disclosed, comprising a reception apparatus for receiving a product produced by stereolithography, a radiation apparatus for irradiating a product received in the reception apparatus, and a movement apparatus, coupled between the reception apparatus and the radiation apparatus, for producing a relative movement between the product received in the reception apparatus and the radiation apparatus. The movement apparatus comprises a first guide apparatus for guiding the relative movement along a first guide path and a second guide apparatus for guiding the relative movement along a second guide path that differs from the first guide path.

Abstract: A method for producing a dental restoration (D) by CAD casting is described, said method comprising the steps of a) recording three-dimensional, digital data of the dentition or of a part of the dentition of a patient, b) creating a virtual dental restoration (VD) using the recorded three-dimensional, digital data, wherein the virtual dental restoration (VD) is expanded in relation to the dental restoration (D) to be produced, c) preparing a model (M) using the created virtual dental restoration, such that the model (M) is expanded in relation to the dental restoration (D) to be produced, d) embedding the model (M) in an embedding compound (EM), e) hardening the embedding compound (EM) and removing the model (M), such that a casting mold is obtained, f) filling the casting mold, preferably by pouring, with a casting material (GM) and cooling the casting material (GM), such that the dental restoration (D) is obtained, and optionally the further steps of g) working the dental restoration (D), and h) veneering t

Abstract: A set of elements is described for use in the production of a dental prosthesis (20), in particular of a crown, a bridge, an inlay or an onlay, comprising: a framework (3) and one or more model parts (5) for defining parts of the outer contour of a veneer (15) for the framework (3), wherein the model part or parts (5) can be mounted on the framework (3) in such a way that, at one and the same time, (i) a gap (7) remains between the model part or parts (5) and the framework (3) and (ii) the model part or parts (5) define parts [lacuna] the outer contour. Corresponding methods and systems are also described.

Abstract: A method for producing a dental restoration (D) by CAD casting is described, said method comprising the steps of a) recording three-dimensional, digital data of the dentition or of a part of the dentition of a patient, b) creating a virtual dental restoration (VD) using the recorded three-dimensional, digital data, wherein the virtual dental restoration (VD) is expanded in relation to the dental restoration (D) to be produced, c) preparing a model (M) using the created virtual dental restoration, such that the model (M) is expanded in relation to the dental restoration (D) to be produced, d) embedding the model (M) in an embedding compound (EM), e) hardening the embedding compound (EM) and removing the model (M), such that a casting mold is obtained, f) filling the casting mold, preferably by pouring, with a casting material (GM) and cooling the casting material (GM), such that the dental restoration (D) is obtained, and optionally the further steps of c) working the dental restoration (D), and h) veneering t

Abstract: In a method for forming a dental part, a laser beam is guided over a powder layer of biocompatible material. The laser is guided by a computer controlled laser scanning system based on data representing the shape of the cross-section through the shaped body. The powder is substantially melted by the laser beam to form a layer in the shaped body, to build the shaped body entirely from layers of laser-melted material.

Abstract: In a method for forming a dental part, a laser beam is guided over a powder layer of biocompatible material. The laser is guided by a computer controlled laser scanning system based on data representing the shape of the cross-section through the shaped body. The powder is substantially melted by the laser beam to form a layer in the shaped body, to build the shaped body entirely from layers of laser-melted material.

Abstract: A set of elements is described for use in the production of a dental prosthesis (20), in particular of a crown, a bridge, an inlay or an onlay, comprising: a framework (3) and one or more model parts (5) for defining parts of the outer contour of a veneer (15) for the framework (3), wherein the model part or parts (5) can be mounted on the framework (3) in such a way that, at one and the same time, (i) a gap (7) remains between the model part or parts (5) and the framework (3) and (ii) the model part or parts (5) define parts [lacuna] the outer contour. Corresponding methods and systems are also described.

Abstract: The invention relates, inter alia, to a method for the production of a ceramic shaped body (22), comprising the following steps: production or provision of a green body (10) having a structured surface region (12), irradiation of at least the structured surface region (12), so that the green body (10) is consolidated in the region of a volume zone (16) including the structured surface region (12), but is not consolidated or is consolidated to only a lesser degree in volume zones further from the surface, separation of the consolidated volume zone (16) including the structured surface region (12) from parts of the green body (10) which have not been consolidated or have been consolidated to only a lesser degree, and optionally scouring of the consolidated volume zone (16) obtained in this way.

Abstract: A burning-on alloy for the production of ceramically veneered dental restorations, containing: cobalt 55-65 percent by weight, chromium 20-30 percent by weight, tungsten and/or where the sum of the content by weight molybdenum of molybdenum and half the content by weight of tungsten is in the range of 4-12 percent by weight, gallium 2-4 percent by weight, silicon 0-2 percent by weight, manganese 0.05-1.9 percent by weight, nitrogen 0-0.4 percent by weight, carbon 0-0.02 percent by weight, vanadium, niobium, in total 0-5 percent by weight, tantalum, iron, titanium, zirconium, hafnium nickel 0-0.1 percent by weight, rhenium, gold, in total 0-0.09 percent by weight, silver, copper other metals, 0-1 percent by weight, semi-metals and impurities where the percent by weight data are in each case based on the total weight of the alloy, is described.

Abstract: The invention relates to a method (100, 200, 300) for producing a dental prosthesis (17) comprising a framework (3) and a veneer (15), in particular for creating a crown, a bridge, an inlay or an onlay. The invention also relates to a system (40, 50) for creating a dental prosthesis (17) comprising a framework (3) and a veneer (15) as well as a corresponding computer program.

Abstract: The invention relates to an apparatus for contactless temperature measurement of a melting charge located in a melting crucible 2 inside a melting furnace, in particular a furnace for precision casting, by means of a pyrometer 5 with an optical system 8 and at least one sensor 6 optically connected to said optical system 8, wherein said optical system 8 can be directed by means of a sight glass 18 onto at least one section of the melting crucible 2. In order to reduce soiling caused by smoke gas deposits on the sight glass, a tube is provided which is connected at its upper end to the sight glass 18, extends into a melting chamber 11 of the melting furnace and can be pointed in the direction of the melting crucible 2.

Abstract: The present invention relates to a method for the fabrication of a dental cast part having the following steps: Forming and hardening a first working model of a dentition, in such a way that the material used for fabrication of the working model expands during hardening; modelling a restoration from a modelling material on the first working model or a second working model that is essentially identical to the first working model in respect of its dimensions; embedding the restoration model in a settable dental investment that is at least essentially quartz-free; hardening the dental investment; removing the restoration model from the dental investment so that a casting form is created; introducing liquid metal into the casting form and allowing the metal to solidify in the casting form; removal of the metal that has solidified to form a dental cast part.

Abstract: The invention concerns an apparatus 1 for carrying out a melting and casting operation in the fine casting art comprising a melting crucible 2 for receiving melting charge, a heating device 3 for heating the melting charge in the melting crucible 2, and a pyrometer 8 for ascertaining the temperature of the melting charge. In order to improve the quality of the products manufactured with such an operation the invention provides that the apparatus 1 is provided with a control device 4 for controlling the melting and casting operation in dependence on the ascertained melting charge temperature, wherein the control device 4 has a database 16 with a plurality of selectable, respectively melting charge material-specific parameter sets PS1, PS2, PS3 each with one or more parameters for configuring the pyrometer 8.

Abstract: The present invention relates to a method for the fabrication of a dental cast part having the following steps:

Abstract: In a method for forming a dental part, a laser beam is guided over a powder layer of biocompatible material. The laser is guided by a computer controlled laser scanning system based on data representing the shape of cross-section through the shaped body. The powder is substantially melted by the laser beam to form a layer in the shaped body, to build the shaped body entirely from layers of laser-melted material.

Abstract: A bioactive ceramic material for dental fillings and crowns on the basis of calcium phosphate compounds contains crystallites of sparingly water-soluble calcium phosphate compounds in an amorphous, vitreous or polycrystalline matrix of readily water-soluble calcium phosphate compounds, the Ca/P-atomic ratio of the calcium phosphate compounds being altogether <1.65.

Abstract: An apparatus for drawing off dust-laden gases, especially in the art of dental technique, has a ring channel (15) which can be loaded with compressed air. The airstream which is provided by a compressed-air nozzle (26) performs an arcuate movement in the ring channel (15), whereby dust-laden gases are drawn in through an annular slit (22) and conveyed to an outlet channel (13). The apparatus is suitable for drawing off gases from containers. The apparatus serves for drawing off dust-laden air which is released when mixing solid substances, for example dental investment material, in a container (10).

Abstract: The invention is directed to the creation of a material which does not have the hazardous properties of prior art materials containing quartz. In the material according to the invention, quartz is replaced with a quartz-free magmatic rock, especially nepheline syenite. Surprisingly, the magmatic rock in powdered form attains nearly the same treatment results as conventional materials which contain quartz. The material according to the invention is particularly suitable for polishing and blasting dental parts, especially those parts which are made of plastic material.