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    PROCESS OF MANUFACTURING A DENTAL MILLING BLOCK WITH A HOMOGENEOUS COLOR AND/OR TRANSLUCENCY GRADIENT
    1.
    发明公开
    PROCESS OF MANUFACTURING A DENTAL MILLING BLOCK WITH A HOMOGENEOUS COLOR AND/OR TRANSLUCENCY GRADIENT 审中-公开

    公开(公告)号：US20230270529A1

    公开(公告)日：2023-08-31

    申请号：US18015338

    申请日：2021-07-19

    申请人： 3M INNOVATIVE PROPERTIES COMPANY

    发明人： Martin Goetzinger ,  Hans R. Schnagl

    IPC分类号： A61C13/00 ,  A61K6/802 ,  B28B3/00 ,  B28B11/24 ,  B01F23/60 ,  B01F27/231 ,  B01F27/806

    CPC分类号： A61C13/0022 ,  A61K6/802 ,  B28B3/00 ,  B28B11/24 ,  B01F23/60 ,  B01F27/2312 ,  B01F27/806

    摘要： The invention relates to a process of manufacturing a dental milling block with a homogeneous color and/or translucency gradient. This process comprises the steps of providing a mold with a cavity having a z-direction and an x/y-direction, filling the cavity partially with a first powder up to a height H1, the first powder having a volume VP1 with a top and bottom surface, introducing a second powder on top of the first powder up to a height H2, the second powder having a volume VP2 with a top and bottom surface and, the top surface of the first powder being in contact with the bottom surface of the second powder and forming an intermediate region, providing a mixer unit with at least one rotatable mixing element, introducing the rotating mixing element in z-direction into the intermediate region, mixing the powder located in the intermediate region by rotating the mixing element, removing the rotating mixing element from the powder, compacting the powder, optionally applying heat to the compacted powder, the first powder differing from the second powder by its physical properties and/or chemical composition and/or color. The invention also relates to a process of producing a dental restoration using dental milling block obtainable according to this process.

    Dental Mill Blank, Process for Production and Use Thereof
    4.
    发明申请
    Dental Mill Blank, Process for Production and Use Thereof 有权

    公开(公告)号：US20220226084A1

    公开(公告)日：2022-07-21

    申请号：US17658454

    申请日：2022-04-08

    申请人： 3M INNOVATIVE PROPERTIES COMPANY

    发明人： Michael Jahns ,  Hans R. Schnagl

    IPC分类号： A61C13/00 ,  A61C5/77 ,  C04B35/64 ,  A61C8/00 ,  C04B35/634 ,  C04B35/632 ,  C04B35/486 ,  A61C7/00 ,  C04B35/488 ,  C04B35/626

    摘要： The invention relates to a coloured zirconia ceramic dental mill blank having fluorescing properties, processes of production such a mill blank and uses thereof, in particular for producing zirconia ceramic dental restorations.
    The dental mill blank having a shape allowing the dental mill blank to be attached or fixed to a machining device, the dental mill blank comprising a porous zirconia material, the porous zirconia material comprising the oxides Zr oxide calculated as ZrO2: from about 80 to about 97 wt.-%, Al oxide calculated as Al2O3: from about 0 to about 0.15 wt.-%, Y oxide calculated as Y2O3: from about 1 to about 10 wt.-%, Bi oxide calculated as Bi2O3: from about 0.01 to about 0.20 wt.-%, Tb oxide calculated as Tb2O3: from about 0.01 to about 0.8 wt.-%, and optionally one or two of the following oxides: Er oxide calculated as Er2O3: from about 0.01 to about 3.0 wt.-%, Mn oxide calculated as MnO2: from about 0.0001 to about 0.08 wt.-%, wt.-% with respect to the weight of the porous zirconia material.

    Kit of parts containing dental mill blank colouring solution
    6.
    发明授权
    Kit of parts containing dental mill blank colouring solution 有权

    公开(公告)号：US10709529B2

    公开(公告)日：2020-07-14

    申请号：US15500442

    申请日：2015-07-30

    申请人： 3M INNOVATIVE PROPERTIES COMPANY

    发明人： Michael Jahns ,  Hans R. Schnagl

    IPC分类号： A61C13/00 ,  A61K6/78 ,  A61K6/818 ,  A61K6/824 ,  A61K6/833 ,  A61K6/891 ,  A61C5/20 ,  A61C5/77 ,  A61C7/00 ,  A61C8/00 ,  A61C13/08 ,  A61C13/271 ,  A61C13/277 ,  C04B35/488 ,  C04B41/00 ,  C04B41/46 ,  C04B41/53 ,  C04B41/82 ,  C04B41/91 ,  C09D17/00

    摘要： The present invention relates to a kit of parts comprising a dental mill blank comprising a porous zirconia material and a colouring solution for colouring the porous zirconia material. The porous zirconia material comprises Zr oxide calculated as ZrO2: from 80 to 97 wt.-%, Al oxide calculated as Al2O3: from 0 to 0.15 wt.-%, Y oxide calculated as Y2O3: from 1 to 10 wt.-%, Bi oxide calculated as Bi2O3: from 0.01 to 0.2 wt.-%, the porous zirconia material not comprising Fe calculated as Fe2O3 in an amount of more than 0.01 wt.-%, wt.-% with respect to the weight of the porous zirconia material. The colouring solution comprises solvent(s), colouring agent(s) comprising metal ions selected from Tb, Er, Pr, Mn or combinations thereof, the solution not comprising Fe ions in an amount of more than 0.01 wt.-%, the solution not comprising Bi ions in an amount of more than 0.01 wt.-%, wt.-% with respect to the weight of the colouring solution. The invention also relates to a process of producing a dental restoration, the process comprising the steps: providing a dental mill blank comprising a porous zirconia material as described in any of the preceding claims, machining an article out of the porous zirconia material, the article having the shape of a dental restoration with an outer and inner surface, providing a colouring solution as described in any of the preceding claims, applying the colouring solution to at least portions of the surface of the article having the shape of a dental restoration.

    Multi-layered zirconia dental mill blank and process of production
    8.
    发明授权
    Multi-layered zirconia dental mill blank and process of production 有权

    公开(公告)号：US10898302B2

    公开(公告)日：2021-01-26

    申请号：US16095433

    申请日：2017-10-21

    申请人： 3M INNOVATIVE PROPERTIES COMPANY

    发明人： Rainer K. Dittmann ,  Hans R. Schnagl ,  Grit Kindler ,  Björn Theelke ,  Michael Sogl ,  Michaela Urban

    IPC分类号： A61C13/00 ,  A61C13/083 ,  A61C13/08 ,  C04B35/48

    摘要： 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.

    KIT OF PARTS CONTAINING DENTAL MILL BLANK COLOURING SOLUTION
    10.
    发明申请
    KIT OF PARTS CONTAINING DENTAL MILL BLANK COLOURING SOLUTION 审中-公开

    公开(公告)号：US20170216000A1

    公开(公告)日：2017-08-03

    申请号：US15500442

    申请日：2015-07-30

    申请人： 3M INNOVATIVE PROPERTIES COMPANY

    发明人： Michael Jahns ,  Hans R. Schnagl

    IPC分类号： A61C13/00 ,  C04B41/00 ,  C04B41/53 ,  C04B41/46 ,  C04B41/82 ,  C04B41/91 ,  C09D17/00 ,  A61K6/02 ,  A61K6/00 ,  A61K6/027 ,  A61K6/087 ,  A61C13/08 ,  A61C5/20 ,  A61C5/77 ,  A61C7/00 ,  A61C8/00 ,  A61C13/271 ,  A61C13/277 ,  C04B35/488

    摘要： The present invention relates to a kit of parts comprising a dental mill blank comprising a porous zirconia material and a colouring solution for colouring the porous zirconia material. The porous zirconia material comprises Zr oxide calculated as ZrO2: from 80 to 97 wt.-%, Al oxide calculated as Al2O3: from 0 to 0.15 wt.-%, Y oxide calculated as Y2O3: from 1 to 10 wt.-%, Bi oxide calculated as Bi2O3: from 0.01 to 0.2 wt.-%, the porous zirconia material not comprising Fe calculated as Fe2O3 in an amount of more than 0.01 wt.-%, wt.-% with respect to the weight of the porous zirconia material. The colouring solution comprises solvent(s), colouring agent(s) comprising metal ions selected from Tb, Er, Pr, Mn or combinations thereof, the solution not comprising Fe ions in an amount of more than 0.01 wt.-%, the solution not comprising Bi ions in an amount of more than 0.01 wt.-%, wt.-% with respect to the weight of the colouring solution. The invention also relates to a process of producing a dental restoration, the process comprising the steps: providing a dental mill blank comprising a porous zirconia material as described in any of the preceding claims, machining an article out of the porous zirconia material, the article having the shape of a dental restoration with an outer and inner surface, providing a colouring solution as described in any of the preceding claims, applying the colouring solution to at least portions of the surface of the article having the shape of a dental restoration.