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：US20180206952A1

公开(公告)日：2018-07-26

申请号：US15744930

申请日：2016-07-11

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Helmar B. Mayr ,  Gioacchino Raia ,  Daniel D. Oberpertinger ,  Martin Goetzinger ,  Peter Bissinger

IPC: A61C13/00

CPC classification number: A61C13/0022 ,  A61C13/0004 ,  A61C13/0013 ,  A61C13/0019 ,  B29C64/165 ,  B29C64/20 ,  B33Y30/00

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.

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.

公开(公告)号：US11826215B2

公开(公告)日：2023-11-28

申请号：US16907631

申请日：2020-06-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Helmar B. Mayr

IPC: A61C13/00 ,  A61C19/10 ,  G16H20/40 ,  A61C13/08 ,  A61C13/083 ,  A61C13/09

CPC classification number: A61C19/10 ,  A61C13/0004 ,  A61C13/0006 ,  A61C13/0022 ,  A61C13/082 ,  A61C13/083 ,  A61C13/09 ,  G16H20/40

Abstract: A system having at least one dental blank and an associated shade guide. The dental blank exhibits a non-uniform color shading, and the shade guide comprises a plurality of shade specimens each exhibiting a particular color shading representing the same color shading present in a partial area within the dental blank. A method of making a dental restoration includes the use of the system. The invention facilitates making a dental restoration having a color shading resembling the color shading of a natural tooth.

公开(公告)号：US11345087B2

公开(公告)日：2022-05-31

申请号：US16321534

申请日：2017-07-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Gioacchino Raia ,  Adrian S. Eckert ,  Bernhard Hofmann ,  Christian A. Richter ,  Bastian P. Kirchner ,  Anja Friedrich ,  Helmar B. Mayr ,  Carsten Franke ,  Gallus Schechner

IPC: B29C64/245 ,  A61C13/00 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/135 ,  B29C64/129 ,  A61C13/087 ,  B29C64/20 ,  A61C13/08 ,  B29K105/00 ,  B29K509/00 ,  B29L31/00

Abstract: A device for progressively building up an object from a light hardenable material. The device has a perforated build platform for the object. The build platform forms a build surface that faces a light source. The build platform and the light source are positionable relative to each other by computer control. The device is further configured for supplying the light hardenable material through the perforation of the build platform for building up the object. The invention enables the making of colored objects by stereolithography.

公开(公告)号：US20210268730A1

公开(公告)日：2021-09-02

申请号：US17250254

申请日：2019-06-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Gioacchino Raia ,  Adrian S. Eckert ,  Helmar B. Mayr ,  Dietmar Blees

IPC: B29C64/182 ,  B29C64/135 ,  B29C64/386 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00

Abstract: A method of building up at least a first (10) and a second (20) physical workpiece from a light hardenable material (105) on a 3D printing device (100). The method has the steps of providing to the 3D printing device a first dataset for building up a first workpiece; starting a first print job based on the first dataset; providing to the same 3D printing device a second dataset for building up a second workpiece after the start the first print job; and starting a second print job based on the second dataset before finishing the first print job.

公开(公告)号：US10245126B2

公开(公告)日：2019-04-02

申请号：US15515238

申请日：2015-10-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Helmar B. Mayr

IPC: A61C13/00 ,  A61C13/08 ,  A61C13/09 ,  G01J3/50 ,  G06T7/12 ,  G06T7/90 ,  A61B1/24 ,  G01J3/46 ,  G06T7/00 ,  A61C19/10

Abstract: A method of making a dental restoration has the steps of capturing an image of a tooth, posterizing the image, determining a tooth color structure, providing information about a multicolored block having a block color structure, matching the tooth color structure and the block color structure, based on the matching, determining a position within the block in which the tooth color structure and the block color structure match, and machining the dental restoration from the block at the determined position. The invention helps facilitating the making of dental restorations at maximized aesthetics.

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：US10759707B2

公开(公告)日：2020-09-01

申请号：US15574630

申请日：2016-05-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Helmar B. Mayr ,  Malte Korten ,  Christine M. Andres ,  Brant U. Kolb ,  Holger Hauptmann ,  Gallus Schechner ,  Michael Jahns ,  Kathleen M. Humpa ,  Melissa A. Lackey

IPC: C04B35/488 ,  C04B35/645 ,  C04B35/632 ,  C04B35/624 ,  C04B35/486 ,  A61C13/083 ,  A61C13/09 ,  A61C13/00 ,  B28B1/00 ,  A61C5/77 ,  B33Y10/00 ,  C04B35/626 ,  A61K6/802 ,  A61K6/807 ,  A61K6/818 ,  A61K6/822 ,  B33Y70/00 ,  A61C7/12 ,  B33Y80/00

Abstract: The present invention relates to a process for producing a ceramic article, the process comprising the steps of providing a printing sol, the printing sol comprising solvent, nano-sized particles, radiation curable monomer(s) and photoinitiator, the printing sol having a viscosity of less than 500 mPa*s at 23° C., processing the printing sol as construction material in an additive manufacturing process to obtain a 3-dim article being in a gel state, the 3-dim article having a Volume A, transferring the 3-dim article being in a gel state to a 3-dim article being in an aerogel state, heat treating the 3-dim article to obtain a sintered 3-dim ceramic article, the ceramic article having a Volume F, Volume A of the 3-dim article in a gel state being more than 500% of Volume F of the ceramic article in its sintered state. The invention also relates to a ceramic article obtainable according to such a process. The ceramic article can have the shape of a dental or orthodontic article.

公开(公告)号：US10653501B2

公开(公告)日：2020-05-19

申请号：US15519063

申请日：2015-09-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bhaskar V. Velamakanni ,  Helmar B. Mayr ,  Holger Hauptmann

IPC: A61C5/30 ,  A61C5/70 ,  A61C13/087 ,  A61C13/09 ,  A61C13/107 ,  A61C5/20 ,  A61C5/73 ,  A61C8/00 ,  A61C13/271

Abstract: A dental article includes a shell defining a volume, the shell including a circumferential base and an incisal/occlusal region distal from the circumferential base. A hardenable dental composition is located within the volume of the shell, and an isolation film is located at the circumferential base of the shell.