Patents Represented by Attorney Ann M. Knab
  • Patent number: 8329296
    Abstract: The invention relates to primary particles of oxide-ceramic material, wherein the primary particles have an average particle size in the range from 10 to 1000 nm and are coated with a chromophoric component, a process for their preparation and their use in particular in the preparation of ceramic moldings and dental restorations. The invention further relates to a suspension based on oxide-ceramic material which contains the primary particles, and a process for the preparation of a ceramic moldings.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: December 11, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Elke Apel, Christian Ritzberger, Wolfram Holand, Christoph Appert, Wolfgang Wachter, Volker Rheinberger
  • Patent number: 8268206
    Abstract: A method of making a dental article including a pressable body possessing a flexural strength of at least 125 MPa and flowable at about 850° C. to about 950° C. The body is composed of at least a glass matrix phase having a composition comprising Li2O and MgO.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: September 18, 2012
    Assignee: Ivoclar Vivadent, AG
    Inventors: Dmitri G. Brodkin, Anna B. Verano
  • Patent number: 8263508
    Abstract: A phosphosilicate glass ceramic with nanoscale fluoroapatite and leucite crystals. The glass ceramic is very similar to natural tooth material in terms of its optical properties. The glass ceramic has a low linear thermal expansion coefficient and a low pressing temperature and is therefore particularly suitable for pressing on metal alloys to produce dental restoration.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: September 11, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Urs Bolle, Marcel Schweiger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • Patent number: 8222315
    Abstract: The present invention relates to a process for the preparation of composites which can be used in the dental field, in which a) mono-or polyfunctional monomers dissolved in a solvent are polymerized to give a polymer gel thoroughly swollen with the solvent, b) the polymer gel produced is subjected to preliminary size reduction, c) a reactive gel is subsequently prepared by the polymer gel, subjected to preliminary size reduction, incorporating a polymerizable monomer or a mixture of polymerizable monomers in the polymer gel while simultaneously removing the solvent, and d) a dental composite is prepared from the reactive gel thus obtained.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: July 17, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Volker Rheinberger, Konrad Hagenbuch, Petra Dellafior
  • Patent number: 8215800
    Abstract: The invention relates to a semiconductor radiation source comprising a base body which is connected to at least one LED chip thermally connected to an end side of the base body and a pliable flexible printed circuit board fitted on the same end side of the base body. The flexible printed circuit board at least partly surrounds the LED chip, has at least one printed-on conductor track (20) electrically connected to the LED chip and, in the peripheral region of the base body, has an angled-away section (27) extending at least partly along a side wall of the base body. At least one part of the section of the flexible printed circuit board (14) extends at least partly in an in particular lateral cutout (34) into the base body (12).
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: July 10, 2012
    Assignee: Ivoclar Vivadent AG
    Inventor: Wolfgang Plank
  • Patent number: 8211956
    Abstract: The invention relates to an adhesion-promoter composition for the adhesive joining of metallic or ceramic dental materials to radically curing dental materials, wherein the adhesion-promoter composition contains an alkoxysilane monomer (i), a phosphoric acid ester monomer (ii), a sulphur-containing monomer (iii) and an organic solvent (iv).
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: July 3, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Thorsten Bock, Norbert Moszner, Volker M. Rheinberger, Ulrich Salz, Frank Zeuner
  • Patent number: 8197299
    Abstract: Milling strategies for machining dental ceramic materials are provided that reduce milling time while maintaining strength, accuracy and marginal integrity.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: June 12, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Markus Heinz, Klaus Rinner, Georg Gorfer, Marius Aster, Marcel Schweiger, Dmitri Brodkin
  • Patent number: 8177416
    Abstract: The invention relates to a dental device, in particular a dental mixing device, with a housing, and with a frame that supports at least one motor and a mixing arm and is mounted on at least two bearings, preferably at least three bearings, in particular four bearings, inside a housing, each of these bearings being clamped between upper and lower elastic, pretensioned damping elements (32, 34). The damping elements are supported respectively on a first, upwardly directed abutment surface (58) and on a second, downwardly directed abutment surface (50) of the housing, in particular on a stand foot (52).
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: May 15, 2012
    Assignee: Ivoclar Vivadent AG
    Inventor: Wolfgang Müller
  • Patent number: 8178012
    Abstract: A dental article includes yttria stabilized tetragonal zirconia polycrystalline ceramic, and no more than about 0.15 wt. % of one or more coloring agents of one or more of: Pr, Tb, Cr, Nd, Co, oxides thereof, and combinations thereof, whereby the dental article is provided with a color corresponding to a natural tooth shade; and wherein the dental article has a flexural strength of at least about 800 MPa. Corresponding methods are also described.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: May 15, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Ajmal Khan, Carlino Panzera, Dmitri G. Brodkin
  • Patent number: 8173562
    Abstract: The invention relates to compositions based on Ce-stabilized ZrO2, and single- and multi-colored blanks made from oxide ceramics, and a process for their preparation, in which oxide ceramic powder is coated with a coloring substance, the coated powders are preferably graded and at least one colored powder is filled into a compression mould, the colored powder or powders are compressed to produce a shaped body, and the compressed shaped body is sintered to produce a blank, and to the use of these blanks for the preparation of dental restorations. The compositions exhibit high fracture toughness and high flexural strength.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: May 8, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfram Höland, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jerome Chevalier, Dmitri Brodkin
  • Patent number: 8162664
    Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: April 24, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Elke Apel, Wolfram Holland, Marcel Schweiger, Christian Ritzberger, Harald Burke, Volker Rheinberger
  • Patent number: 8133831
    Abstract: Slip for use in a hot-melt inkjet printing process which contains (A) ceramic particles, (B) wax and (C) at least one radically polymerizable monomer, and use of the slip to prepare dental restorations. Furthermore, a process for the preparation of a green compact is described, in which the slip is molded in layers to the geometrical shape of the green compact and subjected to a radical polymerization in order to obtain a cured green compact.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: March 13, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Jurgen Laubersheimer, Gianluca Zappini, Volker M. Rheinberger
  • Patent number: 8080189
    Abstract: Process for producing an inorganic-inorganic composite material, in which an open-pore, crystalline oxide ceramic shaped part is produced from an oxide ceramic powder or a powder of an oxide ceramic mixture after shape-imparting processing and presintering, an infiltration substance is applied to this shaped part in vacuo and at room temperature, and the oxide ceramic is sintered in a densifying manner under an air atmosphere and at ambient pressure to form an inorganic-inorganic composite material.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: December 20, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Frank Rothbrust, Christian Ritzberger, Wolfram Höland, Volker Rheinberger
  • Patent number: 8071131
    Abstract: Compositions and methods useful in restorative dentistry are disclosed. Compositions of the present invention include a peptide, and a polymer matrix. The peptide is one capable of reacting with a source of mineralizing ions to initiate deposition of hydroxyapatite crystals within the polymer matrix. Compositions of the present invention are uniquely capable of sealing a junction between a dental restorative material and adjacent native tooth tissue.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: December 6, 2011
    Assignee: Ivoclar Vivadent, Inc.
    Inventor: Bruce Rutherford
  • Patent number: 8072588
    Abstract: The invention relates to a light measuring device 34, in particular for dental light curing devices, for detecting the illumination intensity of a light source 19, which is arranged, in particular, in the light curing device, to which a light guiding device, in particular, having a light exit surface 21 at its outlet, is connected, the light measuring device 34 having at least four measurement fields 38 distributed in two dimensions.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: December 6, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfgang Plank, Bruno Senn
  • Patent number: 8067482
    Abstract: A process for the preparation of plastic molded articles which can be used in the dental field, the process including the steps of: mixing A) at least one polymerizable component and B) at least one initiator in desensitized form to form a paste having a consistency does not demix during injection; injecting the paste into a cuvette; and polymerizing the mixture by applying heat.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: November 29, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Volker Rheinberger, Wolfgang Wachter, Gottfried Rohner
  • Patent number: 8057231
    Abstract: A direct resin veneer (2) for creating a veneer on a tooth surface comprising a thin planar expanse of an uncured restorative material, or direct resin veneer (4). The veneer (4) has a generally tooth configuration that is generously sized to permit adequate coverage for any tooth. Adhered to at least one side of the restorative material is a flexible pliant non-sticky planar sheath (6). The sheath (6) material has a curved gingival arch contour (10) for gum line alignment and various tab-like protrusions that permit placement upon a tooth. An inferior peeling tab (12) allows for sheath to be separated from the resin veneer (4) subsequent to tooth surface placement. And the lateral grasping tabs (16) permit delivery to a tooth's surface.
    Type: Grant
    Filed: November 24, 2007
    Date of Patent: November 15, 2011
    Inventor: Brian D. Viscomi
  • Patent number: 8047021
    Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: November 1, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Marcel Schweiger, Volker M. Rheinberger, Harald Burke, Wolfram Holand
  • Patent number: D653340
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: January 31, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Reinhard Goerge, Wolfram Murr, Sonja Jäger
  • Patent number: D674095
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: January 8, 2013
    Assignee: Ivoclar Vivadent AG
    Inventors: Robert A. Ganley, Dmitri Brodkin