Abstract: A method of making a monolithic dental restoration. The method includes the steps of providing a monolithic precursor of a dental restoration and firing the monolithic dental restoration precursor to provide the monolithic dental restoration. The zirconia material of both the dental restoration precursor as well as the dental restoration has a relative density of greater than 98% of the theoretic density of the zirconia material. The invention helps providing a color of a non-glazed dental restoration which resembles the color of a glazed dental restoration.

Abstract: The invention relates to a porous zirconia article in particular for use in the dental or orthodontic field, the porous zirconia article comprising ZrO2: 80 to 87 wt. %, Y2O3: 3 to 5 wt. %, Al2O3: 10 to 14 wt. %, wt. % with respect to the weight of the porous zirconia article, the porous zirconia article being characterized by a BET surface from 15 to 100 m2/g. The invention also relates to a sintered zirconia article in particular for use in the dental or orthodontic field, the sintered zirconia article comprising ZrO2: 80 to 87 wt. %, Y2O3: 3 to 5 wt. %, Al2O3: 10 to 14 wt. %, wt. % with respect to the weight of the porous zirconia article, the sintered zirconia article being characterized by a corundum crystal phase content of 7 to 12 wt. % and a flexural strength of at least 2,000 MPa.

Abstract: The invention relates to a porous multi-layered coloured zirconia dental mill blank comprising a bottom layer B having the composition COMP-B which comprises ceramic components CER-COMP-B, colouring components COL-COMP-B and stabilizing components STAB-COMP-B, a top layer E having the composition COMP-E which comprises ceramic components CER-COMP-E, colouring components COL-COMP-E stabilizing components STAB-COMP-E, at least one intermediate layer Ex having the composition COMP-E of top layer E, at least one intermediate layer Bx having the composition COMP-B of bottom layer B, x being an integer and indicating the number of intermediate layers, wherein the layers with compositions COMP-B and COMP-E are arranged in alternating order, and wherein the thickness of the individual layers B, Bx is decreasing from bottom to top and the thickness of the individual layers E, Ex is decreasing from top to bottom. The dental mill blank can be used for producing dental articles.

Abstract: The invention relates to a porous zirconia article in particular for use in the dental or orthodontic field, the porous zirconia article comprising ZrO2: 80 to 87 wt. %,Y2O3: 3 to 5 wt. %, AI2O3: 10 to 14 wt. %, wt. % with respect to the weight of the porous zirconia article, the porous zirconia article being characterized by a BET surface from 15 to 100 m2/g. The invention also relates to a sintered zirconia article in particular for use in the dental or orthodontic field, the sintered zirconia article comprising ZrO2: 80 to 87 wt 5, Y2O3: 3 to 5 wt. %), AI2O3: 10 to 14 wt. %, wt. %) with respect to the weight of the porous zirconia article, the sintered zirconia article being characterized by a corundum crystal phase content of 7 to 12 wt. %>and a flexural strength of at least 2,000 MPa.

Abstract: A device for powder based additive material manufacturing of dental appliances. The device has a recoater (10) for providing a powder layer to a build area. The recoater (10) has a slide (11) and is adapted for dispensing of the powder to the build area. The recoater (10) has further at least two powder supplies for individually supplying a first and a second powder on the slide (11) and a powder transport section in which the first and second powder are brought in touch with each other for at least partially merging. The invention is advantageous in that it allows providing dental blanks having color gradients in all three dimensions.

Abstract: The invention relates to a porous multi-layered coloured zirconia dental mill blank comprising a bottom layer B having the composition COMP-B which comprises ceramic components CER-COMP-B, colouring components COL-COMP-B and stabilizing components STAB-COMP-B, a top layer E having the composition COMP-E which comprises ceramic components CER-COMP-E, colouring components COL-COMP-E stabilizing components STAB-COMP-E, at least one intermediate layer Ex having the composition COMP-E of top layer E, at least one intermediate layer Bx having the composition COMP-B of bottom layer B, x being an integer and indicating the number of intermediate layers, wherein the layers with compositions COMP-B and COMP-E are arranged in alternating order, and wherein the thickness of the individual layers B, Bx is decreasing from bottom to top and the thickness of the individual layers E, Ex is decreasing from top to bottom. The dental mill blank can be used for producing dental articles.

Abstract: A method of making a monolithic dental restoration. The method includes the steps of providing a monolithic precursor of a dental restoration and firing the monolithic dental restoration precursor to provide the monolithic dental restoration. The zirconia material of both the dental restoration precursor as well as the dental restoration has a relative density of greater than 98% of the theoretic density of the zirconia material. The invention helps providing a color of a non-glazed dental restoration which resembles the color of a glazed dental restoration.

Abstract: The present disclosure relates to a dental ceramic article comprising ceramic components, the ceramic components having ZrO2 and Al2O3 and at least one component comprising Mn, Er or mixtures thereof, Al2O3 being present in an amount below about 0.15 wt.-% with respect to the weight of the ceramic article. The present disclosure relates also to kit of parts comprising a ceramic article and a coloring solution and processes for producing a dental ceramic article.

Abstract: A device for powder based additive material manufacturing of dental appliances. The device has a recoater (10) for providing a powder layer to a build area. The recoater (10) has a slide (11) and is adapted for dispensing of the powder to the build area. The recoater (10) has further at least two powder supplies for individually supplying a first and a second powder on the slide (11) and a powder transport section in which the first and second powder are brought in touch with each other for at least partially merging. The invention is advantageous in that it allows providing dental blanks having color gradients in all three dimensions.

Abstract: The invention relates to a process for producing a zirconia based dental implant, the process comprising the steps. providing a zirconia based dental implant precursor having a density of below about 4 g/cm3, conducting a first surface treatment step to at least a part of the surface of the zirconia based dental implant precursor, sintering the zirconia based dental implant precursor to obtain a sintered zirconia based dental implant precursor, conducting a second surface treatment step to at least those parts of the surface of the sintered zirconia based dental implant precursor, which have been surface treated before. The invention also relates to a dental implant obtainable according to a process as described in the present text and a kit of parts comprising at least one zirconia based dental milling block suitable for being machined to a zirconia based dental implant precursor.

Abstract: A sintering support comprising a fully stabilized zirconia outer surface; wherein the sintering support withstands sintering a ceramic part in contact with the outer surface without adhesion between the outer surface and the ceramic part, and methods of making and using the sintering support are disclosed.

Abstract: A system and method for sintering dental restorations. The system can include a monolithic sintering support comprising a surface, and at least one dental restoration positioned in direct contact with the surface of the monolithic sintering support. The method can include providing a monolithic sintering support comprising a surface, positioning a dental restoration in direct contact with the surface, and sintering the dental restoration while the dental restoration is in direct contact with the surface of the monolithic sintering support to form a sintered dental restoration.

Abstract: The present disclosure relates to a dental ceramic article comprising ceramic components, the ceramic components having ZrO2 and Al2O3 and at least one component comprising Mn, Er or mixtures thereof, Al2O3 being present in an amount below about 0.15 wt.-% with respect to the weight of the ceramic article. The present disclosure relates also to kit of parts comprising a ceramic article and a colouring solution and processes for producing a dental ceramic article.

Abstract: A sintering support comprising a fully stabilized zirconia outer surface; wherein the sintering support withstands sintering a ceramic part in contact with the outer surface without adhesion between the outer surface and the ceramic part, and methods of making and using the sintering support are disclosed.

Abstract: A system and method for sintering dental restorations. The system can include a monolithic sintering support comprising a surface, and at least one dental restoration positioned in direct contact with the surface of the monolithic sintering support. The method can include providing a monolithic sintering support comprising a surface, positioning a dental restoration in direct contact with the surface, and sintering the dental restoration while the dental restoration is in direct contact with the surface of the monolithic sintering support to form a sintered dental restoration.