Abstract: A method for setting a drop shape in a printing process, including the steps of controlling (S101) a piezo element of a printing nozzle by a first voltage profile; detecting (S102) an electric current value averaged over the first voltage profile or a sound amplitude averaged over the first voltage profile; controlling (S103) the piezo element of the printing nozzle by a second voltage profile; detecting (S104) an electric current value averaged over the second voltage profile or a sound amplitude averaged over the second voltage profile; and selecting (S105) the voltage profile with the lower detected current value or the lower detected sound amplitude.

Abstract: A method for analyzing a print head (103), including the steps of driving (S101) a piezo element within the print head with a sequence of voltage profiles; and detecting (S102) a sound level, a current flow, a resistance, an impedance, and/or a temperature of the print head during the driving.

Abstract: A dental object (100), having an adhering region (103) for attaching the dental object (100) to a tooth, teeth (105) or the gums, including an array (101) of suction cups (107-1, . . . , 107-n).

Abstract: The present invention relates to a dental object (100) for attaching to a tooth (101) or teeth in an intraoral space, having an adhesive region (103) with a gutta-percha material (105) for attaching the dental object (100) to the tooth (101) or teeth.

Abstract: A method for spatially resolved color determination, comprising the steps of projecting (S101) a first structured-light pattern having a first wavelength of light onto a dental object; detecting (S102) a first spatially resolved optical parameter set based on the reflected or remitted first structured-light pattern; projecting (S103) a second structured-light pattern having a second wavelength of light onto the dental object; detecting (S104) a second spatially resolved optical parameter set based on the reflected or remitted second structured-light pattern; and calculating (S105) a third spatially resolved optical parameter set at a third wavelength of light based on the first and second spatially resolved optical parameter sets.

Abstract: A method for preventing deposits of a printing liquid at a nozzle plate (101) of a print head within a 3D printer (100), including the step of increasing a saturation level of a carrier liquid (103) of the printing liquid in the air in front of the nozzle plate (101).

Abstract: A method for removing deposits in a print head of a 3D printer, including the steps of supplying (S101) a liquid having a granular solid to the print head; and setting into vibration (S102) the liquid in the print head.

Abstract: A calibration unit (28) for the calibration of a macroscopic medical imaging device. The calibration unit (28) is especially suitable for the calibration of a macroscopic dental imaging device. The calibration unit (28) comprises a main body (40) having a front surface (42) being configured for being optically oriented towards the imaging device. Moreover, a fluorescent material (54) of a first type is arranged in a first sector (48) of the main body (40). Furthermore, a fluorescent material (58) of a second type is arranged in a second sector (56) of the main body (40). Alternatively or additionally to the fluorescent material (58) of the second type, an opaque, non-fluorescent material (68) is arranged in a third sector (66) of the main body (40). Additionally, a macroscopic medical imaging calibration system, especially a macroscopic dental imaging calibration system is presented.

Abstract: The present invention relates to a dental object (100), having an adhering region (103) for attaching the dental object (100) to a tooth, teeth (105) or the gums, including an array (101) of suction cups (107-1, . . . , 107-n).

Abstract: A manufacturing device (100) for a dental restoration (200), including a tool (101) for machining a blank (201); a detector (103) for detecting a spindle current of a turning spindle (117); and a calculator (105) for calculating wear of the tool (101) based on the spindle current.

Abstract: A machining method including the steps of providing (S101) a data set (101) for the milling process in which at least one process parameter (103) for machining a workpiece (105) is specified; simulating (S102) a machining force on the workpiece (105) based on the data set; and adjusting (S103) the process parameter (103) for machining until a predetermined maximum value for the machining force is reached or a predetermined minimum value is maintained.

Abstract: A dental milling machine for producing a dental object having a sensor for detecting signals caused by a machining tool and an electronic controller for controlling the machining tool based on the detected signals.

Abstract: A dental milling machine (100) for manufacturing a dental object (101), having a microphone (103) for detecting sound signals during a milling operation or an accelerometer for detecting vibration signals; and a position determining device (105) for determining a position of a milling tool (107) and/or a workpiece (111) based on the sound signals or the vibration signals.

Abstract: The present invention relates to a dental object (100) for attaching to a tooth (101) or teeth in an intraoral space, having an adhesive region (103) with a gutta-percha material (105) for attaching the dental object (100) to the tooth (101) or teeth.

Abstract: The present invention relates to a dental sensor (100) for an intraoral region, having a region (101) of plastic material (103) for molding a tooth region (105) during insertion of the dental sensor (100), which is curable after molding.

Abstract: The present invention relates to a dental object (100), comprising an adhering region (103) for attaching the dental object (100) to a tooth, teeth (105) or the gums, comprising an array (101) of suction cups (107-1, . . . , 107-n).

Abstract: A bacteria removal laser is provided, especially for removing caries bacteria from natural or prosthetic teeth, the prosthetic teeth also being treated via extraoral approach, having a gripping handle, a laser radiation source, an application optics having a predetermined radiation exit surface, especially a radiation guide rod through which laser radiation passes, and an energy source such as a mains connection or an accumulator. The laser emits in the wavelength range between 2200 nm and 4000 nm and is especially designed as an Er:YAG laser. The energy output averaged over time is less than 1 mJ/mm2 at the radiation exit surface.

Abstract: A security feature has a plurality of luminescent surface elements, wherein luminescence lifetime varies between the surface elements. In order to verify the security feature, a lock-in imager is used. The security feature is illuminated with excitation light, which is intensity-modulated with a modulation frequency. The luminescent light emitted by the security feature is detected synchronously with the modulation frequency in a plurality of pixels. This is used to determine a measure of a phase shift between the excitation light and the luminescent light in different pixels. The security feature is verified taking account of the measure of the phase shift in different pixels.

Abstract: A bacteria removal laser is provided, especially for removing caries bacteria from natural or prosthetic teeth, the prosthetic teeth also being treated via extraoral approach, having a gripping handle, a laser radiation source, an application optics having a predetermined radiation exit surface, especially a radiation guide rod through which laser radiation passes, and an energy source such as a mains connection or an accumulator. The laser emits in the wavelength range between 2200 nm and 4000 nm and is especially designed as an Er:YAG laser. The energy output averaged over time is less than 1 mJ/mm2 at the radiation exit surface.

Abstract: A security feature has a plurality of luminescent surface elements, wherein luminescence lifetime varies between the surface elements. In order to verify the security feature, a lock-in imager is used. The security feature is illuminated with excitation light, which is intensity-modulated with a modulation frequency. The luminescent light emitted by the security feature is detected synchronously with the modulation frequency in a plurality of pixels. This is used to determine a measure of a phase shift between the excitation light and the luminescent light in different pixels. The security feature is verified taking account of the measure of the phase shift in different pixels.