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.

公开(公告)号：US20200215811A1

公开(公告)日：2020-07-09

申请号：US16631199

申请日：2018-07-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Anja Friedrich ,  Christian A. Richter ,  Malte Korten ,  Bastian Kirchner ,  Michael Jahns ,  Karin Zanklmaier ,  Gioacchino Raia ,  Hans R. Schnagl ,  Andreas G. Herrmann ,  Daniel D. Oberpertinger

IPC: B33Y10/00 ,  B33Y30/00

Abstract: A method of making a physical object by additive manufacturing. In the method a hardenable primary material is provided, the object is built up by successively hardening layers of the hardenable primary material, and the object is cleaned from excess material by moving the object and thereby generating a mass inertial force in the excess material. The invention facilitates the making of objects by additive manufacturing.

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：US20190047214A1

公开(公告)日：2019-02-14

申请号：US16076742

申请日：2017-03-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carsten Franke ,  Maiken Givot ,  Malte Korten ,  Robert L.W. Smithson ,  Brian D. Goers ,  Negus B. Adefris ,  Thomas J. Anderson ,  Brian A. Shukla ,  Michael C. Harper ,  Elizaveta Y. Plotnikov

IPC: B29C64/153 ,  B29C64/393 ,  B22F3/105 ,  B24D18/00 ,  B24D3/06 ,  B24D3/14 ,  B24D5/10

Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. An abrasive article preform is produced by an additive manufacturing sub-process comprising the deposition of a layer of loose powder particles in a confined region and selective heating via conduction or irradiation to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The abrasive article preform produced by additive manufacturing is subsequently heated to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. Also, the methods include receiving, by an additive manufacturing device having a processor, a digital object specifying data for an abrasive article, and generating the abrasive article with the manufacturing device.

公开(公告)号：US20190022826A1

公开(公告)日：2019-01-24

申请号：US16070316

申请日：2017-01-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carsten Franke ,  Maiken Givot ,  Malte Korten ,  Robert L.W. Smithson ,  Brian D. Goers ,  Negus B. Adefris ,  Thomas J. Anderson ,  Brian A. Shukla ,  Michael C. Harper ,  Elizaveta Y. Plotnikov

IPC: B24D3/06 ,  B24D3/14 ,  B24D5/10 ,  B24D7/10 ,  B24D18/00 ,  B29C64/153 ,  B22F3/00 ,  B22F3/105

Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform. Step d) includes heating the abrasive article preform to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. A method of making a metal bond abrasive optionally includes infusing an abrasive article preform with a molten lower melting metal and solidifying the molten lower melting metal to provide the metal bond abrasive article. The present disclosure further provides a vitreous bond abrasive article precursor and a metal bond abrasive article precursor.

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.