Abstract: The invention relates to a process of manufacturing a dental milling block with a homogeneous color and/or translucency gradient.

Abstract: The invention relates to a coloured curable composition for use in an additive manufacturing process, the composition comprising a curable resin composition comprising radiation curable components, a photo initiator, a dye composition comprising a dye D1 and a dye D2, dye D1 having a light absorption maximum within a wave length range from 400 to 530 nm, dye D2 showing a light absorption maximum within a wave length range from 540 to 650 nm. The invention also relates to a 3-dim composite article obtained by processing the curable composition in an additive manufacturing process.

Abstract: A transport trolley for transporting objects for a rail system having at least one rail that has at least three running surfaces, said transport trolley comprising: a base body having an object carrier for receiving at least one object; a roller support which is rotatably supported at the base body and at which at least a first, a second, and a third roller are rotatably supported; and an alignment system having a roller support alignment device for aligning the roller support relative to the base body and having a roller alignment device for a relative alignment of the rollers with respect to one another and/or to the base body.

Abstract: The invention relates to a process of producing a dental zirconia article, the process comprising the step of sintering a porous dental zirconia article, the sintering comprising a heat-treatment segment A characterized by a heating rate of at least 3 K/sec up to a temperature of at least 1,200° C., the porous dental zirconia article being composed of a zirconia material containing 6.0 to 8.0 wt. % yttria, 0.05 to 0.12 wt. % alumina and comprising a coloring component containing Tb, the porous dental zirconia article being essentially free of Fe components. The invention also relates to a process comprising the additional step of applying a glazing composition to the outer surface of the porous zirconia article before the heat-treatment or sintering is conducted.

Abstract: A transport trolley for transporting objects for a rail system having at least one rail that has at least three running surfaces, said transport trolley comprising: a base body having an object carrier for receiving at least one object; a roller support which is rotatably supported at the base body and at which at least a first, a second, and a third roller are rotatably supported; and an alignment system having a roller support alignment device for aligning the roller support relative to the base body and having a roller alignment device for a relative alignment of the rollers with respect to one another and/or to the base body.

Abstract: A method of making a dental article, has steps of (i) providing a layer of sinter powder, (ii) providing a solidifiable binder to form a circumferential fixation zone (114) which encloses a portion of the powder layer. The method further has the step of repeating steps (i) and (ii) with each fixation zone (114) of one layer being in contact with a fixation zone (114) of an adjacent layer such that a plurality of the fixation zones (114) together form a coherent hollow sleeve (116) extending across the layers. The corresponding plurality of powder portions in combination form a contiguous batch (118) of powder captured in the sleeve. The method facilitates the manufacturing of sintered dental articles.

Abstract: The invention relates to a glazing composition suitable for glazing the surface a dental zirconia article. The glazing composition comprises a liquid, glass particles, and hydrophilic silica nano-particles. The invention also relates to a process for sintering a porous dental zirconia article with a glazing composition on its surface.

Abstract: The invention relates to a glazing composition for a porous dental zirconia article, the glazing composition comprising liquid, glass particles, fluorescing component(s) comprising europium, optionally hydrophilic silica nano-particles, and optionally hydrophobic silica nano-particles, wherein the fluorescing component(s) can be contained in the glass particles or as separate component. The invention also relates to a process for sintering a porous dental zirconia article with a glazing composition on its surface.

Abstract: The invention relates to a transport device comprising a transport element for receiving a workpiece, said transport element being movable by means of a motor from a first idle position into a second idle position, the transport element being drivably connected to at least one driver that engages in a drive groove of a drum cam that can be driven by the motor, which can be controlled by means of a programmable control device on the basis of a motor control curve. The drive groove has a variable incline at least in sections and the motor control curve also has a variable course at least in sections, the movement of the transport element being generated by a simultaneous superposition of a first movement component based on a region of variable incline of the drive nut and a second movement component based on a variable region of the motor control curve.

Abstract: The present invention relates to a transport device for transporting objects along a transport track having a rail defining the transport track; at least one slide that is travelably guided at the rail; a coupling element which is provided at the slide and via which the slide can be driven; a first drive unit having a first drive means for driving the slid along a first transport section of the transport track; and a second drive having a second drive means for driving the slide along a second transport section of the transport track. The coupling element is configured to be in engagement in a shape fitting manner with the first drive means and to be in engagement in a force-fitting manner with the second drive means in the region of the second transport section.

Abstract: The invention relates to a process of sintering a dental zirconia restoration, the process comprising a first step of heat-treating a porous dental zirconia article with a heating rate of at least 3 K/sec until a temperature level of 75 to 90% of the final sintering temperature is achieved to obtain a partially sintered dental zirconia article, the porous dental zirconia article having a BET surface of 5 to 12 m2/g and being composed of a 4 mol % yttria stabilized zirconia material and having an alumina content of utmost 0.15 wt. %.

Abstract: The invention relates to a process of producing a dental zirconia restoration, the dental zirconia restoration having an outer and an inner surface, the process comprising the step of firing a porous dental zirconia restoration and a glass until the porous dental zirconia restoration is sintered, the glass being located during the firing step on at least a portion of the outer surface of the porous dental zirconia restoration, wherein the zirconia material of the porous dental zirconia restoration and the glass are selected such that during the firing step the glass infiltrates the pores of the porous dental zirconia restoration to an extent of not more than 5 ?m in depth. The invention also relates to a sintered dental zirconia restoration obtainable by such a process and a kit of parts comprising a porous dental zirconia mill blank and a surface treating agent containing a glass for use in such a process.

Abstract: The invention relates to a transport device comprising a transport element for receiving a workpiece, said transport element being movable by means of a motor from a first idle position into a second idle position, the transport element being drivably connected to at least one driver that engages in a drive groove of a drum cam that can be driven by the motor, which can be controlled by means of a programmable control device on the basis of a motor control curve. The drive groove has a variable incline at least in sections and the motor control curve also has a variable course at least in sections, the movement of the transport element being generated by a simultaneous superposition of a first movement component based on a region of variable incline of the drive nut and a second movement component based on a variable region of the motor control curve.

Abstract: The present invention relates to a transport device for transporting objects along a transport track having a rail defining the transport track; at least one slide that is travelably guided at the rail; a coupling element which is provided at the slide and via which the slide can be driven; a first drive unit having a first drive means for driving the slid along a first transport section of the transport track; and a second drive having a second drive means for driving the slide along a second transport section of the transport track. The coupling element is configured to be in engagement in a shape fitting manner with the first drive means and to be in engagement in a force-fitting manner with the second drive means in the region of the second transport section.

Abstract: The invention relates to a coloured curable composition for use in an additive manufacturing process, the composition comprising a curable resin composition comprising radiation curable components, a photo initiator, a dye composition comprising a dye D1 and a dye D2, dye D1 having a light absorption maximum within a wave length range from 400 to 530 nm, dye D2 showing a light absorption maximum within a wave length range from 540 to 650 nm. The invention also relates to a 3-dim composite article obtained by processing the curable composition in an additive manufacturing process.

Abstract: Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

Abstract: A method of making a dental article, has steps of (i) providing a layer of sinter powder, (ii) providing a solidifiable binder to form a circumferential fixation zone (114) which encloses a portion of the powder layer. The method further has the step of repeating steps (i) and (ii) with each fixation zone (114) of one layer being in contact with a fixation zone (114) of an adjacent layer such that a plurality of the fixation zones (114) together form a coherent hollow sleeve (116) extending across the layers. The corresponding plurality of powder portions in combination form a contiguous batch (118) of powder captured in the sleeve. The method facilitates the manufacturing of sintered dental articles.

Abstract: Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

Abstract: Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

Abstract: Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).