Patents Assigned to DeguDent GmbH
  • 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
  • Publication number: 20190321147
    Abstract: A method for manufacturing a shaped body, comprising creating a mixture of a metal powder and binding agent, compacting the mixture to form a green compact, heating the green compact to a debinding start temperature T1, debinding the green compact by controlled heating of the green compact from start temperature T1 to end temperature T2 at a heat-up rate R1, presintering the debindered green compact to the presinter end temperature TVS at a heat-up rate RHVS, cooling the green compact from the presinter end temperature TVS at a cool-down rate RKVS, whereby at least the heat-up rate RHVS, the presinter end temperature TVS, and the cool-down rate RKVS are tuned relative to each other in such a way that the presintered green compact forming a blank has a surface porosity of 16% to 22% after presintering, and machining and sintering of the blank to form the shaped body.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 24, 2019
    Applicant: DEGUDENT GMBH
    Inventors: Jörg HACHENBERG, Rudi STEINKE, Markus VOLLMANN, Irmgard WISSEL, Gerhard ZELLMANN, Elmar HOCK, Stefan FECHER, Lothar VÖLKL
  • 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
  • Patent number: 10219879
    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 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: May 9, 2014
    Date of Patent: March 5, 2019
    Assignees: DEGUDENT GMBH, FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V., VITA ZAHNFABRIK H. RAUTER GMBH & CO. KG
    Inventors: Bernhard Durschang, Jörn Probst, Norbert Thiel, Joachim Bibus, Markus Vollmann, Udo Schusser
  • Patent number: 10105200
    Abstract: The invention relates to a method for producing a dental model for removable insertion in a recess of a holder, which dental model has a referencing, comprising at least one tooth part having a base to be inserted into the recess, wherein the at least one tooth part is produced using digitized data of a jaw in that the digitized data are saved in a computer beforehand and supplied to a processing machine to produce the at least one tooth part. In order to ensure simple handling of the dental model and in particular to prevent faulty insertion of the dental model or segment, according to the invention the referencing is saved in the computer and, in consideration of the referencing, the at least one tooth part is produced as having the base as a unit.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: October 23, 2018
    Assignee: DEGUDENT GMBH
    Inventors: Stefan Fecher, Andreas Gebhardt, Martin Haizmann, Heiner Horhold, Elmar Hock, Lothar Volkl
  • 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
  • Publication number: 20160278892
    Abstract: A method for manufacturing a shaped body, comprising creating a mixture of a metal powder and binding agent, compacting the mixture to form a green compact, heating the green compact to a debinding start temperature T1, debinding the green compact by controlled heating of the green compact from start temperature T1 to end temperature T2 at a heat-up rate R1, presintering the debindered green compact to the presinter end temperature TVS at a heat-up rate RHVS, cooling the green compact from the presinter end temperature TVS at a cool-down rate RKVS, whereby at least the heat-up rate RHVS, the presinter end temperature TVS, and the cool-down rate RKVS are tuned relative to each other in such a way that the presintered green compact forming a blank has a surface porosity of 16% to 22% after presintering, and machining and sintering of the blank to form the shaped body.
    Type: Application
    Filed: June 10, 2016
    Publication date: September 29, 2016
    Applicant: DEGUDENT GMBH
    Inventors: Jörg HACHENBERG, Rudi STEINKE, Markus VOLLMANN, Irmgard WISSEL, Gerhard ZELLMANN, Elmar HOCK, Stefan FECHER, Lother VÖLKL
  • Patent number: 9453722
    Abstract: A method for determining a combined data record for an object using individual data records based on individual scans of the object, the scans being measured using at least one sensor. To avoid accumulating errors and allow individual data to be rectified or corrected, first partial scans of the object are measured using at least one first sensor and are aligned relative to one another and/or corrected using second partial scans performed by at least two second sensors that are stationary relative to one another, and the individual data records for the combined data record are determined from the aligned and/or corrected partial scans.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: September 27, 2016
    Assignee: DEGUDENT GMBH
    Inventor: Thomas Ertl
  • Patent number: 9393088
    Abstract: A method for manufacturing a shaped body, comprising creating a mixture of a metal powder and binding agent, compacting the mixture to form a green compact, heating the green compact to a debinding start temperature T1, debinding the green compact by controlled heating of the green compact from start temperature T1 to end temperature T2 at a heat-up rate R1, presintering the debindered green compact to the presinter end temperature TVS at a heat-up rate RHVS, cooling the green compact from the presinter end temperature TVS at a cool-down rate RKVS, whereby at least the heat-up rate RHVS, the presinter end temperature TVS, and the cool-down rate RKVS are tuned relative to each other in such a way that the presintered green compact forming a blank has a surface porosity of 16% to 22% after presintering, and machining and sintering of the blank to form the shaped body.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: July 19, 2016
    Assignee: DEGUDENT GMBH
    Inventors: Jörg Hachenberg, Rudi Steinke, Markus Vollmann, Irmgard Wissel, Gerhard Zellmann, Elmar Hock, Stefan Fecher, Lothar Volkl
  • Patent number: 9375296
    Abstract: A procedure for fabricating an individual abutment for a dental prosthesis for an implant anchored in an area of the jaw with an implant attachment running on the abutment side, using a working model molded by the jaw area equipped with the implant. The sulcus area of the gum uncovered above the implant and shaped by a sulcus-former extending from the implant attachment is reproduced in the working model. The abutment has a sulcus section running within the sulcus area and an adjoining head section to admit a part of a dental prosthesis. The sulcus area of the working model having an auxiliary implant attachment corresponding to the implant attachment is measured, and a sulcus section model determined with a circumferential surface and a de-facto sulcus line limiting it on the implant side.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: June 28, 2016
    Assignee: DEGUDENT GMBH
    Inventors: Gerlinde Lange, Horst Bachmann, Frank Fuchs, Alexander Hilbert
  • Patent number: 9321104
    Abstract: The invention relates to a device (10) and a method for sintering sinter products, such as oxidation-prone materials, in particular metallic sintered goods (46), in particular a dental framework, comprising a tray (18), which accommodates the sinter product and is arranged on a base plate (14), a pot-shaped cover (16), which surrounds the tray, with a rim (36) that is sealed towards the base plate, as well as supply and discharge openings (38) for protective gas connected to the interior chamber (30) that is surrounded by the pot-shaped cover. In order to facilitate sintering even at temperatures above 1200° C. without any problems, it is suggested that the tray (18) be covered by a capping element (20), whereby when the tray is covered by the capping element, the interior chamber (34) of the tray is connected in a gas-flow-allowing manner to the interior chamber of the cover.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: April 26, 2016
    Assignee: DEGUDENT GMBH
    Inventors: Joerg Hachenberg, Rudi Steinke, Peter Popp, Irmgard Wissel
  • Publication number: 20150376053
    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: September 4, 2015
    Publication date: December 31, 2015
    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, Michael GÖDIKER, Markus VOLLMANN, Udo SCHUSSER
  • Patent number: 9206077
    Abstract: The invention relates to glass ceramics, which show high strength, high translucency, high chemical stability and which are still mechanically processible. The invention further refers to a method for producing a dental restoration comprising such glass or glass ceramic as well as the dental restoration itself.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: December 8, 2015
    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, Carsten Wiesner
  • Patent number: 9125812
    Abstract: The invention relates to glass ceramics based on the lithium metasilicate system (Li2OSiO2(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: June 22, 2011
    Date of Patent: September 8, 2015
    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: 9101329
    Abstract: A method for determining the position of an intraoral measuring device which is to be moved relative to an organ of mastication of a patient and with which positions in the organ of mastication or areas of the organ of mastication are measured. To be able to carry out measurements without a fixed reference, it is proposed that, independently of a reference that is independent of the patient, the position of the measuring device is measured by means of a position-determining sensor that is in a fixed relationship to the measuring device.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: August 11, 2015
    Assignee: DEGUDENT GMBH
    Inventor: Thomas Ertl
  • 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