公开(公告)号：US10028810B2

公开(公告)日：2018-07-24

申请号：US14785432

申请日：2014-04-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: A61C13/08 ,  A61C9/00 ,  G01J3/50 ,  A61B1/05 ,  A61B1/24 ,  A61C13/34

Abstract: A method of capturing data from a patient's dentition with the steps of positioning a first optical sensor relative to patient's dentition, capturing the shape of a tooth in the patient's dentition, independent from capturing the shape, measuring a color at a location on the tooth, and providing a correlation between the location of the color and a coordinate in the captured shape. The invention helps providing a dental restoration at a relatively high optical, mechanical, and geometric quality.

公开(公告)号：US20180148378A1

公开(公告)日：2018-05-31

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 ,  C04B35/624 ,  C04B35/626 ,  C04B35/645 ,  B28B1/00 ,  B33Y10/00 ,  B33Y70/00 ,  A61C13/00

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：US20180127317A1

公开(公告)日：2018-05-10

申请号：US15574646

申请日：2016-05-26

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. Humpal ,  Melissa A. Lackey ,  Paul D. Pennington

IPC: C04B35/486 ,  C04B35/624 ,  C04B35/64 ,  A61K6/00 ,  A61K6/02 ,  B28B1/00 ,  B33Y80/00 ,  B33Y10/00

CPC classification number: C04B35/486 ,  A61C5/70 ,  A61C5/73 ,  A61C5/77 ,  A61C13/0013 ,  A61C13/0019 ,  A61C13/083 ,  A61C13/09 ,  A61K6/0008 ,  A61K6/0205 ,  A61K6/0215 ,  A61K6/024 ,  A61K6/0245 ,  A61K6/025 ,  B28B1/001 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  C04B35/624 ,  C04B35/64 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/5454 ,  C04B2235/6026 ,  C04B2235/762 ,  C04B2235/765 ,  C04B2235/9653

Abstract: The invention relates to the use of a printing sol as construction material in an additive manufacturing process for producing a 3-dim article, the printing sol comprising solvent(s), nano-sized crystalline zirconia particles in an amount from 2 to 25 vol.-% with respect to the volume of the sol, the average primary particle size of the nano-sized crystalline zirconia particles being in a range up to 50 nm, a first monomer being a polymerizable surface modification agent represented by formula A-B, with A being capable of attaching to the surface of the nano-sized crystalline zirconia particles and B being a radiation curable group, optionally a second monomer, the second monomer comprising at least one radiation curable moiety but no acidic or silane group(s), photo initiator(s). The invention also relates to a ceramic article obtainable according to such a process.

公开(公告)号：US11339095B2

公开(公告)日：2022-05-24

申请号：US15574646

申请日：2016-05-26

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. Humpal ,  Melissa A. Lackey ,  Paul D. Pennington

IPC: C04B35/486 ,  B28B1/00 ,  A61C13/00 ,  A61C13/083 ,  C04B35/624 ,  C04B35/64 ,  A61C5/73 ,  A61C5/77 ,  A61C13/09 ,  B33Y70/00 ,  A61C5/70 ,  A61K6/17 ,  A61K6/82 ,  A61K6/802 ,  A61K6/807 ,  A61K6/818 ,  A61K6/822 ,  B33Y10/00 ,  B33Y80/00

Abstract: The invention relates to the use of a printing sol as construction material in an additive manufacturing process for producing a 3-dim article, the printing sol comprising solvent(s), nano-sized crystalline zirconia particles in an amount from 2 to 25 vol.-% with respect to the volume of the sol, the average primary particle size of the nano-sized crystalline zirconia particles being in a range up to 50 nm, a first monomer being a polymerizable surface modification agent represented by formula A-B, with A being capable of attaching to the surface of the nano-sized crystalline zirconia particles and B being a radiation curable group, optionally a second monomer, the second monomer comprising at least one radiation curable moiety but no acidic or silane group(s), photo initiator(s). The invention also relates to a ceramic article obtainable according to such a process.

公开(公告)号：US11202694B2

公开(公告)日：2021-12-21

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 ,  B33Y30/00 ,  B29C64/20 ,  B29C64/165

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：US10709534B2

公开(公告)日：2020-07-14

申请号：US15035794

申请日：2014-11-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Helmar B. Mayr

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

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：US20190176394A1

公开(公告)日：2019-06-13

申请号：US16321534

申请日：2017-01-28

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 ,  A61C13/08 ,  B29C64/135 ,  B33Y10/00 ,  B33Y30/00

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：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：US11071607B2

公开(公告)日：2021-07-27

申请号：US15775044

申请日：2016-11-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Helmar B. Mayr ,  Malte Korten ,  Carsten Franke ,  Robert Leland Wee Smithson

IPC: A61C5/77 ,  A61C13/00 ,  B33Y10/00 ,  B29C64/30 ,  B29C64/314 ,  B29C64/393 ,  B29C64/106 ,  A61C13/08 ,  A61C13/087 ,  A61C13/09 ,  A61C13/15 ,  B33Y30/00 ,  B33Y80/00 ,  B33Y50/02 ,  A61C7/14 ,  B29C64/118 ,  B29L31/00

Abstract: A method of building up a dental object includes steps of (i) determining the three-dimensional shape of the object; (ii) mixing at least a first and a second component to form a hardenable composition; (iii) depositing the hardenable composition through a nozzle; (iv) performing steps (ii) and (iii) in combination with moving the nozzle by computer control based on said data. The invention helps providing an object like a dental restoration at maximized geometric and optical quality.

公开(公告)号：US20200315761A1

公开(公告)日：2020-10-08

申请号：US16907631

申请日：2020-06-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Malte Korten ,  Helmar B. Mayr

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

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.