Patents Assigned to Ivoclar Vivadent AG
  • Metal oxide ceramic nanomaterials and methods of making and using same
    Patent number: 11208355
    Abstract: Provided are metal oxide ceramic materials and intermediate materials thereof (e.g., nanozirconia gels, nanozirconia green bodies, pre-sintered ceramic bodies, zirconia dental ceramic materials, and dental articles). The nanozirconia gels are formable gels. Also provided are methods of making and using the metal oxide materials and intermediate materials. The nanozirconia gels can be made using, for example, osmotic processing. The nanozirconia gels can be used to make nanozirconia green bodies, pre-sintered ceramic bodies, zirconia dental ceramic materials, and dental article. The nanozirconia green bodies, pre-sintered ceramic bodies, zirconia dental ceramic materials, and dental articles have desirable properties (e.g., optical properties and mechanical properties).
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: December 28, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Wei Xu, Yijun Wang, Dmitri Brodkin
  • Polymer materials with unsaturated transfer reagents
    Patent number: 11198668
    Abstract: Radically polymerizable composition which contains at least one vinyl ether according to general formula I:
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: December 14, 2021
    Assignees: Ivoclar Vivadent AG, Technische Universität Wien
    Inventors: Norbert Moszner, Yohann Catel, Iris Lamparth, Robert Liska, Christian Gorsche, Gernot Peer
  • Process for determining a tooth color
    Patent number: 11199452
    Abstract: A process for determining a tooth color of a filling or another restoration is provided which in particular is produced using composite materials, wherein at least one tooth is scanned or is visually detected. The process is characterized in that natural teeth are spectrally measured in advance, that the color values measured within a color space are classified into several, in particular four, categories which each form a color cloud extending in a three-dimensional fashion within the color space, which is done with the help of a structuring algorithm, in particular a Nearest Neighbour Algorithm, or a symmetry recognition algorithm, and that the tooth color of the filling is determined by means of evaluating to which category the tooth scanned has the smallest color distance, or to which color cloud the tooth scanned belongs.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: December 14, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Stefan Lerch, José Antonio Pulido Estepa
  • Method for producing a prosthesis or partial prosthesis
    Patent number: 11197743
    Abstract: A method for generating a prosthesis or partial prosthesis based on digital data using a plurality of teeth (10) and a prosthesis base (12) to be manufactured, characterized in that the generatively or subtractively generated teeth (10) and/or the generatively or subtractively generated prosthesis base (12) are manufactured having oversize, apart from regions of the teeth (10) and the prosthesis base (12) on which the teeth (10) and the prosthesis base (12) abut against each another and/or are joined or connected to each other, and in that the teeth (10) and/or the prosthesis base (12) are subsequently brought to the desired original dimension, in particular milled, with at least partial removal of the oversize (30, 32).
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 14, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Alexander Faust, Philipp Muhmenthaler
  • Dental furnace and process for operating a dental furnace
    Patent number: 11184956
    Abstract: The invention relates to a dental furnace, in particular a high-temperature dental furnace for oxide ceramics such as zirconium dioxide having sintering temperatures of between 1300 and 1850° C., comprising a heating element (10) which is intended to give off heating energy to the firing chamber. It is provided that the heating element (10) comprises at least two heating element sections (48, 50) adjoining one another at a transition area (34) which is not current-carrying and/or which extends away laterally, that the transition area (34) is supported on a position, in particular on the free end, spaced apart from the electrical connections (16, 18) on the dental furnace and carries at least the two adjoining parts of heating element sections (48, 50).
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: November 23, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Rudolf Jussel, Manuel Schlegel
  • Dental light curing apparatus
    Patent number: 11181263
    Abstract: The invention relates to a dental light curing apparatus, having a display device on or at a housing wall of the light curing apparatus, especially on the upper face of the light curing apparatus, having a plurality of light sources, which are arranged below said wall and facing the wall, wherein at least part of the wall is transparent to the light radiation emitted from the light sources, wherein the wall comprises a smooth outer surface, and an equally essentially smooth inner surface of the wall is provided with a negative pattern (18), and especially is printed, leaving the symbols (14) free, which negative pattern (18) is light-impermeable or essentially light-impermeable, and that the wall is superimposed onto the light source structure, which comprises partition walls (32), which separate the light sources (30) from each other.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: November 23, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Bruno Senn, Dario Tommasini
  • Dental materials with improved mechanical properties
    Patent number: 11141354
    Abstract: Radically polymerizable dental material, which contains a combination of a thiourea derivative, a hydroperoxide and at least one peroxide as well as a transition metal compound as initiator system for the radical polymerization.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: October 12, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Alexandros Gianasmidis, Michael Westphal, Deborah Kalberer
  • Polymerizable compositions with acyltin photoinitiators
    Patent number: 11142592
    Abstract: Polymerizable compositions are described which contain, as photoinitiator, at least one acyltin compound according to the general formula (I):
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: October 12, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Urs Karl Fischer, Peter Burtscher, Robert Liska, Patrick Knaack, Moritz Mitterbauer
  • Dental materials with improved setting behaviour
    Patent number: 11141356
    Abstract: Radically polymerizable dental material, which contains a combination of a thiourea derivative, a hydroperoxide and at least one peroxide as initiator system for the radical polymerization.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: October 12, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Alexandros Gianasmidis, Michael Westphal, Andy Brot, Barbara Grabenbauer
  • Dental materials based on urethane-group-containing vinylcyclopropane derivatives
    Patent number: 11135136
    Abstract: Vinylcyclopropane of general formulae I in which X, Y in each case are O or NH, wherein X and Y cannot have the same meaning, R1 is a linear or branched C1-C8-alkyl radical, which can be interrupted by O, S, an ester group or a urethane group, R2 is a linear or branched C2-C10-alkylene radical, which can be interrupted by O, S, an ester group or a urethane group, R3 is a hydrocarbon radical with 1 to 20 carbon atoms, which additionally can contain one or more N, O or S atoms, and n is 1, 2, 3 or 4, preferably 1 or 2. The vinylcyclopropanes are characterized by a low shrinkage and a high reactivity on radical polymerization and are suitable in particular for the preparation of dental materials.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: October 5, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Yohann Catel, Urs Karl Fischer, Sven Tauscher
  • Lithium silicate materials
    Patent number: 11109949
    Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: September 7, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Marcel Schweiger, Volker Rheinberger, Harald Bürke, Wolfram Höland, Elke Signer-Apel, Christian Ritzberger, Dmitri Brodkin
  • Method for producing a prosthesis or partial prosthesis
    Patent number: 11090141
    Abstract: A method for producing a prosthesis or partial prosthesis based on digital data, using multiple teeth present in a dental arch (14) and a prosthesis base to be produced. The prosthesis base is rough-milled by a milling tool, i.e. is milled in a first step, and the prosthesis base present as a semi-finished product, in particular in regions of the prosthesis base on which the teeth and the prosthesis base abut against each another and/or are to be bonded to each other, is partially milled, i.e. is milled in a second step, by a different milling tool, thereby being brought to a target height which corresponds to the desired bonding gap between the prosthesis base and the tooth or dental arch (14).
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: August 17, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Thomas Baaske, Robert Wolfgang Krybus
  • System comprising a color selection aid and a method for determining tooth colors
    Patent number: 11094085
    Abstract: A system having an auxiliary color selection body and a method for determining the colors of a dental object, i.e. the colors of tooth, residual limb or gingiva, is provided, wherein the auxiliary color selection body (10) has a substantially U-shaped or L-shaped or ring-shaped structure, on which at least one, preferably 4, reference features (18), for recognition of the auxiliary color selection body (10) is/are attached, and wherein, with respect to the reference features (18), a plurality of tooth, stump or gingiva color fields (30) are arranged on the color selection auxiliary body (10). It is provided for an image of a tooth (16) to be taken with the auxiliary color selection body (10) being adjacent thereto on at least two sides and the tooth color is determined based on this image (FIG. 1).
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: August 17, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Stefan Lerch, Manuel Schlegel
  • Glass ceramic having SiO2 as main crystal phase
    Patent number: 11091388
    Abstract: Glass ceramics having SiO2 as main crystal phase and precursors thereof are described which are characterized by very good mechanical and optical properties and in particular can be used as restoration material in dentistry.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: August 17, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Markus Rampf, Marc Dittmer, Christian Ritzberger, Marcel Schweiger, Wolfram Höland
  • Rendering of dental models
    Patent number: 11083552
    Abstract: The invention pertains to a method for realistic visualization of a 3D virtual dental model (1) in a 2D image (20) of a face, the method comprising estimating or assuming a lighting situation in the image of the face, determining boundaries of an inner mouth region in the image, computing, based on the boundaries of the inner mouth region, on a 3D face geometry and on the lighting situation, a shadowing in the inner mouth region, computing a lighting of the dental model (1) based at least on the computed shadowing, and visualizing the dental model (1) and the 2D image (20), wherein at least the inner mouth region in the image is overlaid with a visualization (21) of the dental model having the computed lighting.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: August 10, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Marcel Lancelle, Roland Mörzinger, Nicolas Degen, Gabor Sörös, Bartolovic Nemanja
  • Method for the preparation of glasses and glass ceramics with SiO2 as main crystal phase
    Patent number: 11072556
    Abstract: The invention relates to a method for the preparation of a glass ceramic or a glass, which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. The invention also relates to a glass ceramic and a glass which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: July 27, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Markus Rampf, Sebastian Krolikowski, Christian Ritzberger, Wolfram Höland, Marcel Schweiger
  • Dental applicator
    Patent number: 11051911
    Abstract: The invention relates to a dental applicator comprising an applicator housing and a plunger body guided movably in said applicator housing, wherein the applicator housing comprises a connection for detachably mounting a cannula in a pressure-resistant manner, said cannula comprising a connection body and a cannula tube that is rigidly connected in or on said connection body, and the applicator housing (12) and/or plunger body (14) having a receiving device (22) for at least partially receiving a bendable cannula tube (20).
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: July 6, 2021
    Assignee: Ivoclar Vivadent AG
    Inventor: Frank Müller
  • Dental restoration production device and add-on or attachment
    Patent number: 11051922
    Abstract: The invention relates to a dental restoration production device, comprising a curable dental restoration material (20) and a radiation-curing device by means of which the curable dental restoration material (20) can be cured using light radiation, UV radiation and/or heat radiation in order to produce a dental restoration part (22), and comprising an add-on (24) or attachment to the radiation-curing device, which faces said dental restoration material (20) or can be directed thereto, wherein said attachment or add-on (24) has a molding surface that corresponds to the target shape of the surface (52) of the dental restoration material (20) and forms a negative mold (54) therefor on the region facing the radiation-curing device.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: July 6, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Gottfried Rohner, Markus Pauler, Alexander Kögel
  • Prosthesis as well as retrofit kit for a prosthesis
    Patent number: 11051917
    Abstract: The invention relates to a dental prosthesis comprising a prosthesis base and teeth which are attached in or to the prosthesis base (14), wherein the prosthesis base (14) comprises a ventilation element, in particular a ventilation valve (12).
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: July 6, 2021
    Assignee: Ivoclar Vivadent AG
    Inventors: Robert Wolfgang Krybus, Andreas Häfele Clemens, Konrad Hagenbuch, Roger Frei
  • Dental abutment
    Patent number: D928323
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: August 17, 2021
    Assignee: Ivoclar Vivadent AG
    Inventor: Goran Burger