公开(公告)号：US20150125821A1

公开(公告)日：2015-05-07

申请号：US14407769

申请日：2013-03-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Björn Theelke ,  Rainer K. Dittmann ,  Markus Muellritter

IPC: A61K6/02 ,  A61K6/00 ,  A61C13/08 ,  A61C8/00 ,  A61C13/00

CPC classification number: A61K6/024 ,  A61C8/0012 ,  A61C8/0015 ,  A61C13/0006 ,  A61C13/0022 ,  A61C13/081 ,  A61C2008/0046 ,  A61K6/007

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 translation: 本发明涉及一种生产基于氧化锆的牙科植入物的方法，该方法包括以下步骤。 提供密度低于约4g / cm 3的基于氧化锆的牙科植入物前体，对所述基于氧化锆的牙科植入物前体的至少一部分表面进行第一表面处理步骤，烧结所述基于氧化锆的牙种植体前体以获得 基于烧结氧化锆的牙科植入物前体，对至少已经经过表面处理的氧化锆烧结前体的表面的至少那些部分进行第二表面处理步骤。 本发明还涉及根据本发明所述的方法可获得的牙科植入物，以及包含至少一种基于氧化锆的牙科研磨块的试剂盒，其适于被加工成基于氧化锆的牙科植入物前体。

公开(公告)号：US11253436B2

公开(公告)日：2022-02-22

申请号：US16092626

申请日：2017-04-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Michael Jahns ,  Rainer K. Dittmann ,  Grit Kindler ,  Dajana Maria Anna Zimmermann

IPC: A61K6/822 ,  A61C13/00 ,  A61C13/083 ,  A61C5/77 ,  C04B35/486 ,  A61K6/818

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.

公开(公告)号：US10898302B2

公开(公告)日：2021-01-26

申请号：US16095433

申请日：2017-10-21

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

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

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.

公开(公告)号：US11180417B2

公开(公告)日：2021-11-23

申请号：US16484858

申请日：2018-02-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bjorn Theelke ,  Rainer K. Dittmann

IPC: C04B35/488 ,  A61C13/083 ,  B33Y10/00 ,  B33Y70/00 ,  A61K6/807 ,  A61K6/822 ,  A61K6/818 ,  A61C13/00 ,  A61C13/08 ,  B28B1/00 ,  B28B1/14 ,  B28B11/24 ,  C04B35/624 ,  C04B35/634 ,  C04B35/64 ,  B33Y80/00

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.

公开(公告)号：US20190117521A1

公开(公告)日：2019-04-25

申请号：US16092626

申请日：2017-04-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Michael Jahns ,  Rainer K. Dittmann ,  Grit Kindler ,  Dajana Maria Anna Zimmermann

IPC: A61K6/02 ,  C04B35/486 ,  A61C13/00 ,  A61C13/083 ,  A61C5/77

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.

公开(公告)号：US20170112601A1

公开(公告)日：2017-04-27

申请号：US15315624

申请日：2015-05-27

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Rainer K. Dittmann ,  Hans R. Schnagl

IPC: A61C13/00 ,  A61C13/08 ,  B33Y80/00 ,  B33Y10/00 ,  B33Y30/00 ,  A61C5/77 ,  B28B1/00

CPC classification number: A61C13/0013 ,  A61C5/77 ,  A61C13/0021 ,  A61C13/0022 ,  A61C13/082 ,  B28B1/001 ,  B29C64/165 ,  B29C64/20 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y80/00

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.