Abstract: A method for producing molded parts from a sinterable mixing compound using a cold casting mold having a cavity that corresponds geometrically to the molded part and at least one opening into the cavity, wherein the mold is additively constructed from a starting material, in particular a 3D printing method using a 3D printer, and wherein the cavity is created on the basis of a digital data set, in particular based on a three-dimensional model of the oral cavity of a patient. The cavity is filled via the opening with the sinterable mixing compound, curing and/or solidifying the mixing compound, wherein gases and/or liquids contained in the mixing compound are discharged from the cavity via the opening, thermally and/or thermochemically decomposing the mold at a temperature from 200° C. to 2500° C. and sintering the mixing compound to hardness at a temperature from 900° C. to 2500° C. until a molded part is obtained.

Abstract: A method for producing a cold casting mold (100) for producing dental molded parts (210) from a mixing compound (200), wherein the cold casting mold (100), having a cavity (110) that corresponds geometrically to the dental molded part (210), is additively constructed from a starting material (150) by means of a 3D printing method on the basis of a digital data set based on a three-dimensional model of the oral cavity of a patient and at least one first opening (111) that opens into the cavity (110) for filling with the mixing compound (200). The invention also relates to such an additively constructed cold casting mold (100) for a method for producing dental molded parts (210) from a sinterable or a light-curing mixing compound (200). The cold casting mold (100) is constructed having at least one second opening that opens into the cavity (110) for discharging gases and/or liquids.

Abstract: A method for producing an implant blank (100), in particular a dental implant blank from a starting body, said implant blank (100) comprising at least one first area, which is a surface area (102), and a second area, which is a core area (101), wherein the surface area (102) has at least one bioactive surface material (502) and extends from at least one first surface (103) in the direction of the core area (101), and the core area (101) has at least one carrier material that can be subjected to mechanical load. The starting body has a porosity for controlling a targeted distribution of the bioactive surface material (502) within the starting body and is loaded with a solution (500) of the bioactive surface material (502) in a first step, which is a loading step.

Abstract: A method for the production of a polychromatic and/or spatially polychromatic or a monochrome colored ceramic body, in particular a dentine ceramic blank, which is dyed in this way, wherein in order to control a targeted distribution of color pigments (101, 102) within a porous ceramic (100), in a first step, which is a loading step (3c), the ceramic (100) is loaded with a color pigment solution (104). In a second step, which is a distribution control step (4d), the distribution of the color pigments (101, 102) within the ceramic (100) is controlled by controlling one or more environmental parameters (106) in an environment (108) and/or the pressure and/or temperature.

Abstract: A method for producing an implant blank (100), in particular a dental implant blank from a starting body, said implant blank (100) comprising at least one first area, which is a surface area (102), and a second area, which is a core area (101), wherein the surface area (102) has at least one bioactive surface material (502) and extends from at least one first surface (103) in the direction of the core area (101), and the core area (101) has at least one carrier material that can be subjected to mechanical load. The starting body has a porosity for controlling a targeted distribution of the bioactive surface material (502) within the starting body and is loaded with a solution (500) of the bioactive surface material (502) in a first step, which is a loading step.

Abstract: A process for producing a ceramic body (100), in particular a dental ceramic blank, having selectively adjustable degrees of expression of one or more different physical properties, wherein the ceramic body (100) has a porosity to enable the control of a selective distribution of one or more chemical substances (101, 102) that are suitable for influencing the physical properties of the ceramic body (100), and in a first step, which is a loading step, the ceramic body is loaded with one or more solutions (104) of the one or more chemical substances (101, 102). In a second step, which is a distribution step, the distribution of the one or more chemical substances (101, 102) within the porous ceramic body (100) is controlled, wherein a progression and/or a spatial progression of the degree of expression of the one or more physical properties can be produced.

Abstract: A process for producing a ceramic body (100), in particular a dental ceramic blank, having selectively adjustable degrees of expression of one or more different physical properties, wherein the ceramic body (100) has a porosity to enable the control of a selective distribution of one or more chemical substances (101, 102) that are suitable for influencing the physical properties of the ceramic body (100), and in a first step, which is a loading step, the ceramic body is loaded with one or more solutions (104) of the one or more chemical substances (101, 102). In a second step, which is a distribution step, the distribution of the one or more chemical substances (101, 102) within the porous ceramic body (100) is controlled, wherein a progression and/or a spatial progression of the degree of expression of the one or more physical properties can be produced.

Abstract: A method for the production of a polychromatic and/or spatially polychromatic or a monochrome colored ceramic body, in particular a dentine ceramic blank, which is dyed in this way, wherein in order to control a targeted distribution of color pigments (101, 102) within a porous ceramic (100), in a first step, which is a loading step (3c), the ceramic (100) is loaded with a color pigment solution (104). In a second step, which is a distribution control step (4d), the distribution of the color pigments (101, 102) within the ceramic (100) is controlled by controlling one or more environmental parameters (106) in an environment (108) and/or the pressure and/or temperature.

Abstract: The invention makes it possible to produce very thin ceramic blanks as a precursor for ceramic discs, for example for use as faces in wrist watches. On the other hand, the production of metal blanks for use in CAD/CAM machines is possible with the invention. Both methods are based on depositing the material from a slurry or slip by electrophoresis. The essence of the invention is the isolation of the peripheral region of the precipitation electrodes that is produced by a non-conducting frame. This allows the precipitated mass to be easily lifted off from the precipitation electrode. The subsequent sintering with a possibly proceeding machining operation allows precision articles to be produced.

Abstract: The invention relates to a method for producing tooth parts from dental-grade metal powder, wherein existing CAD/CAM milling machines can be used. The essential process steps consist of: a) preparing a slurry from dental-grade metal powder, b) casting the slurry into a mold, c) drawing out (drying) suspension liquid (water) until a mechanically stable blank is obtained, d) milling the blank into the desired shape, e) oxygen-free sintering of the tooth parts milled from the blank. Because the blank is still present as a green body, milling does not place great demands on the milling machine in terms of mechanical stability and dust development. As a result, the operating speed and the service lives of customary milling machines are substantially increased.

Abstract: The invention relates to a method for producing tooth parts from dental-grade metal powder, wherein existing CAD/CAM milling machines can be used. The essential process steps consist of: a) preparing a slurry from dental-grade metal powder, b) casting the slurry into a mold, c) drawing out (drying) suspension liquid (water) until a mechanically stable blank is obtained, d) milling the blank into the desired shape, e) oxygen-free sintering of the tooth parts milled from the blank. Because the blank is still present as a green body, milling does not place great demands on the milling machine in terms of mechanical stability and dust development. As a result, the operating speed and the service lives of customary milling machines are substantially increased.

Abstract: A printing station for producing a layer of coloring for a contact lens, comprising a transport system to carry and transport a molding tool which comprises at least one contact lens forming mold, a pad unit comprising at least one pad, and a blade unit suitable to carry and ink a cliché with an ink. When in use the pad transfers an inked image from the cliché to the contact lens forming mold. The printing station further at least partially cures the inked image after it has been transferred to the mold and cleans the pad.

Abstract: The invention relates to an electrophoretic free forming process, by which both metallic and ceramic formed parts can be produced. In this process, a slip (suspension of water and metal powder or ceramic powder) is fed via a hollow needle (6) to the substrate (3) to be produced. By applying a voltage between the slip (7) and the substrate (3) a material deposit is produced. To build up a three-dimensional form scanned into a computer, the substrate is moved past the tip of the hollow needle (6) in a controlled manner. The control is performed on the basis of known CAD/CAM methods. With this process it is possible in particular to produce all formed parts known in dental technology on one machine. It is suitable in particular for producing reinforcing structures and for coating reinforcing structures with dentine or incisal material. Equally possible is the production of non-dental formed parts of dimensions comparable to those of dental formed parts.

Abstract: The invention relates to a method and device for producing by electrophoresis fully ceramic tooth elements having a predefined spatial shape, wherein an electric conductive plate (1) having different conductive areas is applied to a working model or a structural element directly or at a certain distance. According to a known method, a power is supplied to the plate by means of a cable, which is removable after coating by means of a slip and prior to sintering. According to the inventive method, said laborious operation is nor required anymore. The inventive method consists in fixing the plates (1) to a conductive tooth stump (2) by means of an adhesive conductive material (5) or to an implant abutment (3). The power can be supplied by the tooth stump, the abutment or a leg (7) integrateable with the plate. Said plate is preferably made of zinc or an adhesive conductive material, preferably a mixture of wax and zinc powder which disappears without residues by sintering.

Abstract: When producing tooth replacements from metal, the conventional method of casting is almost exclusively employed, even though said method is a relatively complicated one. The object of the invention is therefore to make available a method that is considerably simpler. In this method, an aqueous suspension, still containing microcrystalline wax and ethoxylated alcohols, is generated with the dental-grade metal powder. The metal powder is deposited on a model by electrophoresis, resulting, for example, in the formation of a cap (4). This cap (4) is filled with investment compound (5) and placed on a firing support (6), where it is sintered in this position. A cap is obtained which, in terms of its strength characteristics, is the equal of a cap that has been produced by casting. Alternatively, the cap (4) can be stabilized, during sintering, on a plated stump or in a muffle filled with a temperature-resistant powder.

Abstract: The coating of dental substrates, such as the stumps of a working model or implants including ceramics, e.g. alumina, by means of electrophoresis results, especially because of the production of gas, in products unfit for use. It is therefore the aim of the invention to provide a coating method that allows for a high-quality coating of dental substrates in the shortest time possible, irrespective of the material constitution of the substrate. According to the inventive method, the substrate (stump 2) is fixated in an insulating mass (3) in a vertical holder (1). The substrate is coated with a separating agent and a hygroscopic layer and a further layer is applied thereon by shortly dipping the stump into the slip (6). The current used for electrophoresis is supplied via the layer (7) so formed. The inventive method, when used for non-conducting substrates, requires no silver enamel or the like. The method can also be used for conducting substrates, e.g.

Abstract: The invention provides a printing station for producing colored contact lenses with high quality color images. The printing station of the invention comprises: (a) a transport system (1) to carry and transport a molding tool (2) which comprises at least one contact lens forming mold; (b) a pad unit (4) comprising at least one pad; (c) a blade unit (5) suitable to carry and ink a cliché (9) with an ink; wherein when in use the pad transfers an inked image from the cliché to the contact lens forming mold; d) curing means to at least partially cure the inked image after it has been transferred to the mold; (d) cleaning means to clean the pad/s (7). The printing station is preferably integrate in a partially or fully automated contact lens production line.

Abstract: The invention relates to a method for producing fully ceramic tooth elements having a pre-determined spatial form by means of electrophoresis. According to said method, an electroconductive chip or a chip which has been rendered conductive is arranged directly between two stumps of a working model (10, 20) or a structural element, or at a distance therefrom. Said chip (30) can comprise regions (50, 60) of different electrical conductivity and is connected to the positive pole during the electrophoresis. The inventive method can be used to produce structures for bridges, and to apply veneering material to structures. The geometric form of the different regions enables the local current strength and the local material deposition to be regulated, in such a way as to obtain a desired spatial form of the deposit. The thus produced tooth element therefore requires no further extensive secondary work, saving a considerable amount of time.

Abstract: The invention relates to the production of substructures, especially copings, consisting of ceramic material, preferably alumina. The stump of a work model is lined with a film or a separating agent. This lining is made electroconductive by e.g. using a metallized film or applying a silver coating. The stump is dipped in slip and a direct voltage is applied, causing the stump to be coated with an even ceramic, e.g. alumina layer which can be baked into a ceramic blank immediately after drying. The resistance of said ceramic blank is then increased by glass infiltration. Post-processing is not necessary since the ceramic material is deposited with a very even layer thickness. The inventive method is associated with a considerable saving of time in the production of a full ceramic tooth replacement.

Abstract: The invention relates to a method for producing crowns etc. by producing a frame, for example, made of alumina, whereby a film (6) is shrink-fitted on the die (3) of a working model. The film (6) is provided with a slip and the slip is baked on a frame after the film is removed. In order to accelerate the method and to avoid the loss of materials, the die (3) is placed on a rotatable shaft (2). The slip is deposited with a tool (5). A drying process using a hot air dryer (7) is carried out during and/or after depositing the slip. This method can also be carried out in a CNC machine with which the veneer ceramic is successively deposited. A separating agent similar to lipstick can be deposited in place of the film (6). Said separating agent melts at temperatures greater than 45 DEG C. when the spacer function is not used. The invention also relates to a crease-free shrink-fitting of the film (6).