Patents Assigned to DeguDent GmbH
  • Publication number: 20230099360
    Abstract: The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallization and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Application
    Filed: June 28, 2022
    Publication date: March 30, 2023
    Applicants: FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V., VITA Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard DURSCHANG, Jörn PROBST, Norbert THIEL, Joachim BIBUS, Markus VOLLMANN, Udo SCHUSSER
  • Publication number: 20210055157
    Abstract: The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Application
    Filed: September 4, 2020
    Publication date: February 25, 2021
    Applicants: FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V., VITA Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard DURSCHANG, Jörn Probst, Norbert Thiel, Joachim Bibus, Markus Vollmann, Udo Schusser
  • Patent number: 10442725
    Abstract: The invention relates to glass ceramics based on the lithium metasilicate system (Li2O.SiO2(Li2SiO3)), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high-strength, highly translucent and chemically stable glass ceramic.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: October 15, 2019
    Assignees: FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V., VITA Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard Durschang, Jörn Probst, Norbert Thiel, Michael Gödiker, Markus Vollmann, Udo Schusser
  • Patent number: 10357343
    Abstract: The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: July 23, 2019
    Assignees: Vita Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard Durschang, Jörn Probst, Norbert Thiel, Joachim Bibus, Markus Vollmann, Udo Schusser
  • Publication number: 20190142556
    Abstract: The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Application
    Filed: December 20, 2018
    Publication date: May 16, 2019
    Applicants: FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V., VITA Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard DURSCHANG, Jörn PROBST, Norbert THIEL, Joachim BIBUS, Markus VOLLMANN, Udo SCHUSSER
  • Publication number: 20180155234
    Abstract: The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Application
    Filed: January 9, 2017
    Publication date: June 7, 2018
    Applicants: VITA Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard DURSCHANG, Jörn PROBST, Norbert THIEL, Joachim BIBUS, Markus VOLLMANN, Udo SCHUSSER
  • Patent number: 9730863
    Abstract: The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: August 15, 2017
    Assignees: Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V., Vita Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard Durschang, Jörn Probst, Norbert Thiel, Michael Gödiker, Markus Vollmann, Udo Schusser, Michael Hackner
  • Patent number: 9604873
    Abstract: The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallization and, after complete crystallization, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: March 28, 2017
    Assignees: Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V., Vita Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard Durschang, Jörn Probst, Norbert Thiel, Joachim Bibus, Markus Vollmann, Udo Schusser
  • Patent number: 9025164
    Abstract: The invention relates to a method for ascertaining material characteristics of an object, in particular optical properties of preferably semi-transparent objects. The aim of the invention is to obtain material characteristics without complex measuring methods. This is achieved in that spectrally resolved data from measured data of the object are calculated with spectrally resolved data of a reference body in order to ascertain the material characteristics, the measured data being ascertained with a confocal 3D measuring system.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: May 5, 2015
    Assignee: Degudent GmbH
    Inventors: Thomas Ertl, Raimund Hibst, Karl Stock, Rainer Graser, Michael Zint
  • Patent number: 8986009
    Abstract: A process for determining 3-D data of at least one prepared jaw area, such as a prepared tooth stump, by mechanically scanning the jaw area and digitizing the measured values determined during the scanning. The jaw area is prepared with a dental instrument having positions which are optically measured during the preparation, and the 3-D data is determined from the positions of the dental instrument that are associated with the prepared jaw area.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: March 24, 2015
    Assignee: Degudent GmbH
    Inventors: Lothar Völkl, Stefan Fecher, Hartmut Brinkmann, Ralf Jaumann
  • Patent number: 8979340
    Abstract: A method and arrangement for transmitting radiation emitted by LEDs operated in pulsed operation via at least one optical waveguide, wherein a first optical waveguide having first and second coupling surfaces is assigned to each LED, the first optical waveguides are in each case aligned, by their first coupling surfaces, with an assigned stationary LED, the second coupling surfaces are arranged on a closed path and a coupling surface of a second optical waveguide is assigned to the second coupling surfaces. In order that a high light power can be coupled into the second optical waveguide by means of the LEDs, it is provided that the second optical waveguide, in accordance with the clocking of the switched-on LEDs, can be aligned with the second coupling surface of a first optical waveguide from at least one switched-on LED.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: March 17, 2015
    Assignee: Degudent GmbH
    Inventors: Thomas Ertl, Johannes Herzig
  • Patent number: 8956987
    Abstract: The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallization and, after complete crystallization, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: February 17, 2015
    Assignees: Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V., Vita Zahnfabrik H. Rauter GmbH & Co. KG, Degudent GmbH
    Inventors: Bernhard Durschang, Jorn Probst, Norbert Thiel, Joachim Bibus, Markus Vollmann, Udo Schusser
  • Publication number: 20140249016
    Abstract: The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.
    Type: Application
    Filed: May 9, 2014
    Publication date: September 4, 2014
    Applicants: FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V., VITA Zahnfabrik H. Rauter GmbH & Co. KG, DeguDent GmbH
    Inventors: Bernhard DURSCHANG, Jörn Probst, Norbert Thiel, Joachim Bibus, Markus Vollmann, Udo Schusser
  • Patent number: 8685294
    Abstract: Method of producing a dental ceramic structure by digitizing a model or partial model of the prosthesis to be produced and generating a CAD data set, cutting each section of the muffle based on the CAD data set to form the cavity, pressing the ceramic into the cavity by way of at least one sprue, removing the hardened ceramic from the cavity with the sprue or flash and removing the sprue or flash based on the CAD data set.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: April 1, 2014
    Assignee: Degudent GmbH
    Inventors: Stefan Fecher, Lothar Völkl
  • Patent number: 8662890
    Abstract: A method for manufacturing a dental restoration for at least one section of a dental arch on the basis of digital overall data which are calculated in relation to individual data, which are based on three-dimensional optical individual measurements that are performed intra-orally of an area that contains at least one section of the dental arch. In order to ensure that the overall data, which have been received from individual measurements, represent the measured section of the dental arch and/or the dental arch in its entirety without any distortions, it is proposed that at least one area of the dental arch be measured together with a reference, which supplies three-dimensional information, and calculated from the individual data while considering the reference of the overall data.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: March 4, 2014
    Assignee: Degudent GmbH
    Inventor: Thomas Ertl
  • Publication number: 20130295523
    Abstract: The invention relates to glass ceramics based on the lithium metasilicate system (Li2O SiO2 (Li2SiO3)), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high- strength, highly translucent and chemically stable glass ceramic.
    Type: Application
    Filed: June 22, 2011
    Publication date: November 7, 2013
    Applicants: FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V., DeguDent GmbH, VITA Zahnfabrik H. Rauter GmbH & Co. KG
    Inventors: Bernhard Durschang, Jôrn Probst, Norbert Thiel, Michael Godiker, Markus Vollmann, Udo Schusser
  • Patent number: 8524150
    Abstract: A dental alloy with a high gold content that is devoid of palladium and copper. To achieve high mechanical stability, the dental alloy contains between 75 and 95 wt. % Au, between 5 and 20 wt. % Pt, between 0.5 and 3.5 wt. % Zn and/or Sn and/or In, between 0.1 and 0.8 wt. % of an element of a group I, in addition to a single particle refiner of a group II. The weight fraction of the element of group I is between 2 and 6 times that of the single particle refiner of group II, and one element of group I is represented by Nb or Ta or Ti or V and the particle refiner of group II is represented by Ir or Rh.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: September 3, 2013
    Assignee: Degudent GmbH
    Inventors: Jochen Bauer, Lothar Volkl, Doris Hathaway, Angela Klaus, Martin Schuster, Rudi Steinke
  • Patent number: 8512606
    Abstract: A procedure for dimensionally accurate sintering of a shaped piece manufactured from a blank of porous ceramic material, in which during the sintering, the shaped piece remains connected via at least one first connection like a rib, with a support that is manufactured from the blank. To ensure with simple procedural steps and simple design measures that the geometry does not change during sintering, the invention provides that the support is manufactured as a section of the blank that at least in sections surrounds the shaped piece by materials removal processing from the blank, and after the manufacture, the support, for one, is connected via the at least one first connection with the shaped piece, and for another, via at least one second connection with the residual blank that in sections is separated from the support.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: August 20, 2013
    Assignee: Degudent GmbH
    Inventors: Martin Kutzner, Sarah Tullney
  • Patent number: 8515528
    Abstract: A measuring arrangement and a method for the three-dimensional measurement of at least part of an object includes a light source with a continuous spectrum, a device for generating a multifocal lighting pattern, a lens with a large chromatic aberration for imaging foci of the lighting pattern on the object, a detection unit for generating the wavelength spectrum of the foci that are confocally imaged on the object via the lens, and a spectrum-dispersive device disposed between the confocally imaged foci and the detection device. In order to create a highly accurate surface profile in a relatively short time even in the case of moving objects, the invention proposes that a first hole pattern including first holes be disposed in the plane of the confocally imaged foci, the geometric arrangement of the first holes corresponding to the geometric arrangement of the foci of the multifocal lighting pattern.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: August 20, 2013
    Assignee: Degudent GmbH
    Inventors: Rainer Graser, Raimund Hibst, Karl Stock, Michael Zint
  • Patent number: 8501082
    Abstract: A method for manufacturing a multipart assembly of sintered oxide ceramic material, including one first component which at least partially surrounds one second component in such a manner that detaching the first component from the second component is not possible without destroying the first and/or second component. The assembly is produced by producing a single-part first shaped part and a single-part second shaped part from an oxide ceramic blank, whereby the first shaped part and the second shaped part are enlarged to compensate for the shrinkage during sintering, and assembling the sintered shaped part as second component with the first shaped part and subsequently sintering them together.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: August 6, 2013
    Assignee: Degudent GmbH
    Inventors: Elmar Hock, Stefan Fecher, Lothar Volkl