公开(公告)号：US20190021815A1

公开(公告)日：2019-01-24

申请号：US16078455

申请日：2017-02-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Gallus Schechner ,  Reinhold Hecht ,  Helmar B. Mayr ,  Malte Korten ,  Bernhard Hofmann ,  Gioacchino Raia ,  Till Meurer

IPC: A61C5/73 ,  A61C5/77 ,  A61C13/20

Abstract: The invention relates to a preformed dental composite crown being characterized by its shape and chemical composition, the shape being characterized as follows: having an occlusal top surface and depending buccal, mesial, distal and lingual side surfaces, the side surfaces being connected to each other and forming a crown cervix, the wall thickness of the crown at the crown cervix being lower than 0.6 mm; at least two of opposing depending side surfaces having a concave shape; the chemical composition of the material the preformed dental composite crown is made of being a hardened composition comprising the following components: nano-filler(s) in an amount from 20 to 70 wt. %, resin matrix in an amount from 20 to 75 wt. %, wt. % with respect to the weight of the chemical composition, the resin matrix comprising urethane(meth)acrylate(s) and (meth)acrylate(s) not comprising a urethane moiety. The invention also relates to a kit of parts comprising such a preformed dental composite crown, processes for producing such crowns and the use of such a crown for treating a dental tooth.

公开(公告)号：US20230338123A1

公开(公告)日：2023-10-26

申请号：US18029975

申请日：2021-09-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Michael Jahns ,  Hans R. Schnagl ,  Gallus Schechner

IPC: A61C13/00 ,  A61K6/818 ,  A61K6/822 ,  A61K6/15 ,  A61K6/82

CPC classification number: A61C13/0022 ,  A61K6/818 ,  A61K6/822 ,  A61K6/15 ,  A61K6/82

Abstract: The invention relates to a set of porous zirconia dental mill blanks comprising at least two differently colored porous zirconia dental mill blanks, the porous zirconia dental mill blanks comprising zirconia, yttria, coloring ions, and optionally alumina, comprising multiple layers with different yttria content, having a bottom layer and a top layer, the content of yttria and coloring ions in mol % changing in opposite direction to each other from the bottom layer to the top layer, and the content of yttria and coloring ions in mol % being adjusted to provide an essentially constant ratio of the sum of yttria and coloring ions in mol % between the top layer and the bottom layer for the at least two differently colored zirconia dental mill blanks. The invention also relates to a process of producing such a set.

公开(公告)号：US20230320942A1

公开(公告)日：2023-10-12

申请号：US18333956

申请日：2023-06-13

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas HERRMANN ,  Gioacchino Raia ,  Malte Korten ,  Oliver Kappler ,  Bernhard Hofmann ,  Adrian Eckert ,  Helmar Mayr ,  Reinhold Hecht ,  Gallus Schechner ,  Rainer Guggenberger

IPC: A61K6/887 ,  A61C5/73 ,  A61K6/77 ,  A61K6/65 ,  A61K6/76 ,  A61K6/62 ,  A61K6/17 ,  C08L33/08 ,  C08L33/10 ,  C08L75/06

CPC classification number: A61K6/887 ,  A61C5/73 ,  A61K6/77 ,  A61K6/65 ,  A61K6/76 ,  A61K6/62 ,  A61K6/17 ,  C08L33/08 ,  C08L33/10 ,  C08L75/06

Abstract: The invention relates to A curable composition for producing dental composite crowns, the composition comprising a resin matrix comprising polymerizable (meth)acrylate(s) not comprising a urethane moiety, polymerizable urethane(meth)acrylate(s), wherein the polymerizable (meth)acrylate(s) not comprising an urethane moiety are used in excess over the polymerizable urethane(meth)acrylate(s), a filler matrix comprising nanocluster(s), fumed silica in an amount below 8 wt. % with respect to the weight of the whole composition, an initiator system comprising photoinitiator(s), organic dye(s), the curable composition not comprising softener in an amount of more than 5 wt. % with respect to the weight of the whole composition, the curable composition having a viscosity below 150 Pa*s at 23° C. and a shear rate of 1 s−1.
The invention also relates to a cured article obtained by radiation curing this curable composition by use of an additive-manufacturing method.

公开(公告)号：US11696875B2

公开(公告)日：2023-07-11

申请号：US16622530

申请日：2018-06-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Gioacchino Raia ,  Malte Korten ,  Oliver Kappler ,  Bernhard Hofmann ,  Adrian Eckert ,  Helmar Mayr ,  Reinhold Hecht ,  Gallus Schechner ,  Rainer Guggenberger

IPC: A61K6/887 ,  A61C5/73 ,  A61K6/77 ,  A61K6/65 ,  A61K6/76 ,  A61K6/62 ,  A61K6/17 ,  C08L33/08 ,  C08L33/10 ,  C08L75/06

CPC classification number: A61K6/887 ,  A61C5/73 ,  A61K6/17 ,  A61K6/62 ,  A61K6/65 ,  A61K6/76 ,  A61K6/77 ,  C08L33/08 ,  C08L33/10 ,  C08L75/06

Abstract: The invention relates to A curable composition for producing dental composite crowns, the composition comprising a resin matrix comprising polymerizable (meth)acrylate(s) not comprising a urethane moiety, polymerizable urethane(meth)acrylate(s), wherein the polymerizable (meth)acrylate(s) not comprising an urethane moiety are used in excess over the polymerizable urethane(meth)acrylate(s), a filler matrix comprising nanocluster(s), fumed silica in an amount below 8 wt. % with respect to the weight of the whole composition, an initiator system comprising photoinitiator(s), organic dye(s), the curable composition not comprising softener in an amount of more than 5 wt. % with respect to the weight of the whole composition, the curable composition having a viscosity below 150 Pa*s at 23° C. and a shear rate of 1 s−1. The invention also relates to a cured article obtained by radiation curing this curable composition by use of an additive-manufacturing method.

公开(公告)号：US11534264B2

公开(公告)日：2022-12-27

申请号：US16813024

申请日：2020-03-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Gallus Schechner ,  Reinhold Hecht ,  Helmar B. Mayr ,  Malte Korten ,  Bernhard Hofmann ,  Gioacchino Raia ,  Till Meurer

IPC: A61C5/73 ,  A61C13/087 ,  A61C13/20 ,  A61C5/77 ,  A61K6/893

Abstract: The invention relates to a preformed dental composite crown being characterized by its shape and chemical composition, the shape being characterized as follows: having an occlusal top surface and depending buccal, mesial, distal and lingual side surfaces, the side surfaces being connected to each other and forming a crown cervix, the wall thickness of the crown at the crown cervix being lower than 0.6 mm; at least two of opposing depending side surfaces having a concave shape; the chemical composition of the material the preformed dental composite crown is made of being a hardened composition comprising the following components: nano-filler(s) in an amount from 20 to 70 wt. %, resin matrix in an amount from 20 to 75 wt. %, wt. % with respect to the weight of the chemical composition, the resin matrix comprising urethane(meth)acrylate(s) and (meth)acrylate(s) not comprising a urethane moiety.
The invention also relates to a kit of parts comprising such a preformed dental composite crown, processes for producing such crowns and the use of such a crown for treating a dental tooth.

公开(公告)号：US20220273404A1

公开(公告)日：2022-09-01

申请号：US17753195

申请日：2020-08-27

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Michael Jahns ,  Gallus Schechner

IPC: A61C13/00 ,  A61K6/78 ,  A61K6/818 ,  A61K6/822 ,  C04B35/486 ,  A61C5/77

Abstract: The present invention relates to a dental zirconia mill blank comprising a porous zirconia material, the porous zirconia material comprising Zr oxide, Y oxide, optionally Al oxide, Bi oxide, Tb oxide, Er oxide, Cr oxide, the porous zirconia material not comprising Fe oxide calculated as Fe2O3 of more than 0.01 wt. %, Mn oxide calculated as MnO2 of more than 0.005 wt. %, Co oxide calculated as Co2O3 of more than 0.005 wt. %, wt. % with respect to the weight of the porous zirconia material. The invention also relates to a process of producing such a dental zirconia mill blank and a dental restoration which can be machined from the dental zirconia mill blank. Further, the invention relates to a kit of parts comprising such a dental zirconia mill blank and a dental cement.

公开(公告)号：US20200205935A1

公开(公告)日：2020-07-02

申请号：US16813024

申请日：2020-03-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Gallus Schechner ,  Reinhold Hecht ,  Helmar B. Mayr ,  Malte Korten ,  Bernhard Hofmann ,  Gioacchino Raia ,  Till Meurer

IPC: A61C5/73 ,  A61C13/087 ,  A61C13/20 ,  A61C5/77 ,  A61K6/893

Abstract: The invention relates to a preformed dental composite crown being characterized by its shape and chemical composition, the shape being characterized as follows: having an occlusal top surface and depending buccal, mesial, distal and lingual side surfaces, the side surfaces being connected to each other and forming a crown cervix, the wall thickness of the crown at the crown cervix being lower than 0.6 mm; at least two of opposing depending side surfaces having a concave shape; the chemical composition of the material the preformed dental composite crown is made of being a hardened composition comprising the following components: nano-filler(s) in an amount from 20 to 70 wt. %, resin matrix in an amount from 20 to 75 wt. %, wt. % with respect to the weight of the chemical composition, the resin matrix comprising urethane(meth)acrylate(s) and (meth)acrylate(s) not comprising a urethane moiety.The invention also relates to a kit of parts comprising such a preformed dental composite crown, processes for producing such crowns and the use of such a crown for treating a dental tooth.

公开(公告)号：US20200100863A1

公开(公告)日：2020-04-02

申请号：US16500850

申请日：2018-04-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bastian Kirchner ,  Malte Korten ,  Gallus Schechner

IPC: A61C5/77 ,  A61C13/00 ,  A61C9/00

Abstract: A method of making a dental restoration has the steps of: determining a virtual space available for accommodation of a dental restoration for a tooth to be restored; retrieving a predefined virtual master dental restoration surface from a database; fitting the virtual master dental restoration surface in the space to provide a virtual outer dental restoration surface; creating a virtual inner dental restoration surface independent of a shape of the tooth to be restored; providing a virtual model of a dental restoration based on a combination of the virtual outer dental restoration surface and the virtual inner dental restoration surface; and fabricating the dental restoration based on the dental restoration model.

公开(公告)号：US20190329491A1

公开(公告)日：2019-10-31

申请号：US16462050

申请日：2017-11-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Phillip P. Yu ,  Stephen E. Amos ,  Mark J. Williams ,  Andrea C. Charif Rodriguez ,  Troy K. Ista ,  Joseph C. Dingeldein ,  Adam C. Schendel ,  Jeffrey N. Bartow ,  Michael C. Dadalas ,  Carsten Franke ,  Gabriele H. Gottschalk-Gaudig ,  Klaus Hintzer ,  Malte Korten ,  Gallus Schechner ,  Sebastian F. Zehentmaier ,  Fee Zentis

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/209 ,  C09D11/322 ,  C09D11/037 ,  C09D11/108

Abstract: The method of making a three-dimensional article includes heating a composition comprising a polymer and hollow ceramic microspheres, extruding the composition in molten form from an extrusion head to provide at least a portion of a first layer of the three-dimensional article, and extruding at least a second layer of the composition in molten form from the extrusion head onto at least the portion of the first layer to make at least a portion of the three-dimensional article. Three-dimensional articles are also described. A composition including a polymer and hollow ceramic microspheres is also described. The composition may be a filament. The polymer is at least one of a low-surface-energy polymer or polyolefin. The composition can be useful, for example, in melt extrusion additive manufacturing, for example, fused filament fabrication.

公开(公告)号：US20170209244A1

公开(公告)日：2017-07-27

申请号：US15327772

申请日：2015-07-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Helmar B. Mayr ,  Malte Korten ,  Gallus Schechner

IPC: A61C13/08 ,  A61C9/00 ,  A61B1/24 ,  A61C13/00

CPC classification number: A61C13/082 ,  A61B1/24 ,  A61C9/004 ,  A61C13/0004 ,  A61C13/0022

Abstract: A method of making a customized dental blank. The method has steps of obtaining from a dental practitioner a first color scheme and a different second color scheme as well as a first dimensional information for the first color scheme and a different second dimensional information for the second color scheme. The first and second dimensional information each relate to a size and/or a location within dimensions of the dental blank. The method further has the step of manufacturing the customized dental blank which has a first portion based on the first dimensional information according to the first color scheme and a second portion based on the second dimensional information according to the second color. Further the method has the step of providing the dental practitioner with the customized dental blank. The method helps facilitating the making of a dental restoration from a blank.