Patents Assigned to Vita Zahnfabrik H. Rauter GmbH & Co. KG
  • 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: 10765496
    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: Grant
    Filed: December 20, 2018
    Date of Patent: September 8, 2020
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., VITA ZAHNFABRIK H. RAUTER GMBH & CO. KG, DEGUNDENT 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: 10391671
    Abstract: A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a presintering temperature T1 that is higher than the presintering temperature Ts of said at least second powdery ceramic material; the course of a curve of shrinkage S1 of said at least first powdery ceramic material differs from the course of a curve of shrinkage S2 of said at least second powdery material, wherein curve of shrinkage S1 is shifted towards higher temperatures as compared to curve of shrinkage S2; and the layers are subjected to a common temperature treatment at a presintering temperature Ts that is lower than the presintering temperature T1 and at least equal to T3 to cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein the curve of shrinkage S1 is modified by admixing a
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: August 27, 2019
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co. KG
    Inventors: Michael Tholey, Michael Dorn, Michael Godiker, Norbert Thiel
  • 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
  • Patent number: 10322973
    Abstract: A porous, silicate, ceramic body, optionally with different colors, with a first density, can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, is 25 to 180 MPa.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: June 18, 2019
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co. KG
    Inventors: Norbert Thiel, Michael Dorn, Joachim Bibus, Vilma Geske, Michael Tholey, Enno Bojemueller, Birgit Huber
  • Publication number: 20190167395
    Abstract: A dental furnace for firing dental-ceramic compounds comprises a firing chamber for receiving ceramic elements to be fired. Further, a heating device for heating and firing the ceramic element is provided. The heating device comprises at least one heating element for producing IR radiation in the range of 0.8-5 ?m.
    Type: Application
    Filed: July 6, 2017
    Publication date: June 6, 2019
    Applicant: Vita Zahnfabrik H. Rauter GmbH & Co., KG
    Inventor: Thomas Baholzer
  • Patent number: 10299898
    Abstract: A method for preparing a partial or full dental prosthesis comprising 1.1. acquiring a patient's oral situation by taking an impression or by digital recording; 1.2. if required, digitizing the patient's oral situation; 1.3. selecting the teeth forming the dental prosthesis from a library of teeth or groups of teeth to obtain a virtual set-up of the teeth, which is positioned virtually in a space that takes the acquired patient's situation into account; 1.3.1 said library contains designs of dental arches, tooth shapes, tooth sizes 1.3.2 said library contains designs of the gingiva, and 1.3.3 said library contains total set-ups and/or modular set-ups for all of Angle's bite classes; 1.4. if required, modifying the set-up obtained from the library; 1.5. virtually embedding the teeth arranged in the virtual set-up in a virtual gingiva; 1.6 producing the real prosthesis.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: May 28, 2019
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co. KG
    Inventors: Eva Kerschensteiner, Urban Christen
  • 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: 10266452
    Abstract: The present invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: April 23, 2019
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co. KG
    Inventors: Norbert Thiel, Michael Dorn, Joachim Bibus, Vilma Geske, Michael Tholey, Enno Bojemueller, Birgit Huber
  • 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: 10150706
    Abstract: The present invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: December 11, 2018
    Assignee: VITA ZAHNFABRIK H. RAUTER GMBH & CO. KG
    Inventors: Norbert Thiel, Michael Dorn, Joachim Bibus, Vilma Geske, Michael Tholey, Enno Bojemueller, Birgit Huber
  • Patent number: 9998657
    Abstract: A support system for the manufacture of dental restorations is provided that includes a measurement device for determining the tooth data, such as the tooth color and color coordinates, and a data processing device including a camera for capturing a tooth image. The data processing device includes a reception module and the measurement device has a transmission module, for direct transmission of measured tooth data from the measurement device to the data processing device. The support system further includes an allocation module integrated into the data processing device for allocating the received tooth data to the tooth image, and a transmission module integrated into the data processing device for transmission of the tooth image inclusive of allocated tooth data to a data processing device of a dental laboratory.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: June 12, 2018
    Assignee: VITA ZAHNFABRIK H. RAUTER GMBH & CO. KG
    Inventor: Wolfgang Rauh
  • 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: 9918908
    Abstract: Dental adhesives and their uses, for instance an adhesive containing at least one first component A and at least one second component B, characterized in that said at least one first component A comprises a methyl methacrylate, a copolymer of methyl methacrylate dissolved in excess methyl methacrylate, at least one polyfunctional (meth)acrylate and a peroxide-based free-radical initiator, wherein said copolymer of methyl methacrylate is present in an amount of 30-50 parts by weight dissolved in a solution of 65-85 parts by weight of monomeric methyl methacrylate and 3-15 parts by weight of the polyfunctional (meth)acrylate, especially the triethylene glycol dimethacrylate (TEGDMA), mixed with a solution of 0.5 to 3 parts by weight of said peroxide-based free-radical initiator, especially dibenzoyl peroxide, in 70-90 parts by weight of monomeric methyl methacrylate, and said at least one second component B comprises methyl methacrylate and a tertiary amine.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: March 20, 2018
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co. KG
    Inventor: Stefan Aechtner
  • Patent number: 9814550
    Abstract: An embodiment of the invention is a method for automatic calibration of dental furnaces, there is made available a dental furnace comprising a control unit adapted to control the dental furnace for performing a firing process defined by firing process parameters such as e.g. the temperature and/or a temporal temperature curve and/or a temperature gradient and/or a vacuum in a firing chamber of the dental furnace. There is provided at least one calibration firing-object sample made of a dental material, where said dental material, after said calibration firing-object sample has been subjected to a calibration firing-object process with predetermined firing process parameters, has a defined desired color stored e.g. in the control unit. Further, a color measuring device is used which, for transmission of measurement signals and/or measurement results, is operatively connected to the control unit.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: November 14, 2017
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co. KG
    Inventors: Wolfgang Rauh, Michael Jochen Tholey, Vanik Jinoian
  • 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: 9681931
    Abstract: Molded member made of form-stabilized material, comprising at least one first component and one second component, characterized in that the second component has a different pigmentation than the first component and the second component is disposed inside the first element, forming a boundary surface, in such a way that the boundary surface represents a spatially curved surface.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: June 20, 2017
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co., KG
    Inventors: Norbert Thiel, Olivia Albarski, Michael Dorn, Stefan Aechtner, Joachim Bibus, Andreas Schmid
  • 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: 20160278885
    Abstract: An implant 1 comprising an enossal area 3 and provided with a coating 2, wherein the coating 2 at least partially covers the enossal area 3, and the coating 2 facilitates the ongrowth of the implant 1 within the bone, characterized in that said coating can be removed chemically and/or mechanically under physiological condition.
    Type: Application
    Filed: September 29, 2014
    Publication date: September 29, 2016
    Applicant: Vita Zahnfabrik H. Rauter GMBH & Co. KG
    Inventors: ARMIN KIRSTEN, Horst FISCHER, Jens FISCHER