Abstract: A dental model includes a base unit having a shape of a section of a jaw and gums of a patient, and at least one removable tooth component which is inserted along a z-axis into a dedicated tooth component recess of the base unit, wherein the removable tooth component includes a tooth section having the shape of a tooth or a tooth stump, the tooth component recess has a substantially cylindrical main recess, the removable tooth component has a plug-in section that is substantially cylindrical and is inserted in the main recess of the tooth component recess, an orientation projection is disposed on one surface of the tooth component away from the tooth section, extending along the z-axis, the tooth component recess that accommodates the orientation projection has an orientation recess adjoining the main recess to accommodate the orientation projection, and the orientation projection and the orientation recesses are designed and/or disposed such that it is only possible to insert the orientation projection into

Abstract: A machining device for material-removing machining of a workpiece includes a stationary frame, a workpiece magazine, a workpiece slide movable relative to the frame and accommodates a workpiece and a housing which encompasses a machining chamber and is located outside the workpiece magazine, wherein the workpiece magazine accommodates a plurality of workpieces, the workpiece magazine moves workpieces to an interchange point, the workpiece slide imparts translational movement to a workpiece along an X axis during workpiece machining and the workpiece slide is movable along the X axis to such an extent that the workpiece located on the workpiece slide is movable to the interchange point disposed outside the machining chamber encompassed by the housing.

Abstract: A method of treating an aqueous cyanide- and/or complexing-agent-containing solution, including high-temperature treating the solution in a closed reaction vessel, discharging at least a portion of the treated solution from the reaction vessel, at least partially replacing the discharged fraction with untreated solution, and subjecting the untreated solution to high-temperature treatment along with a treated-solution fraction remaining in the reaction vessel.

Abstract: In a method for manufacture of prosthetic moulded parts for the dental sector with the aid of galvanic metal deposition, deposition at least partly takes place by pulse current. Deposition is preferably ended in a period of less than 5 hours, particularly within 1 to 2 hours. Deposition preferably takes place in the method of a precious metal or precious metal alloy, particularly gold or a gold alloy. Aqueous gold sulphite baths are more particularly used.