Patents Represented by Attorney Ann M. Knab
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Patent number: 8329296Abstract: 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: GrantFiled: March 4, 2009Date of Patent: December 11, 2012Assignee: Ivoclar Vivadent AGInventors: Elke Apel, Christian Ritzberger, Wolfram Holand, Christoph Appert, Wolfgang Wachter, Volker Rheinberger
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Patent number: 8268206Abstract: 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: GrantFiled: February 12, 2010Date of Patent: September 18, 2012Assignee: Ivoclar Vivadent, AGInventors: Dmitri G. Brodkin, Anna B. Verano
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Patent number: 8263508Abstract: 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: GrantFiled: December 3, 2009Date of Patent: September 11, 2012Assignee: Ivoclar Vivadent AGInventors: Urs Bolle, Marcel Schweiger, Elke Apel, Wolfram Höland, Volker Rheinberger
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Patent number: 8222315Abstract: 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: GrantFiled: November 9, 2006Date of Patent: July 17, 2012Assignee: Ivoclar Vivadent AGInventors: Volker Rheinberger, Konrad Hagenbuch, Petra Dellafior
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Patent number: 8215800Abstract: 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: GrantFiled: October 13, 2009Date of Patent: July 10, 2012Assignee: Ivoclar Vivadent AGInventor: Wolfgang Plank
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Patent number: 8211956Abstract: 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: GrantFiled: June 25, 2009Date of Patent: July 3, 2012Assignee: Ivoclar Vivadent AGInventors: Thorsten Bock, Norbert Moszner, Volker M. Rheinberger, Ulrich Salz, Frank Zeuner
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Patent number: 8197299Abstract: Milling strategies for machining dental ceramic materials are provided that reduce milling time while maintaining strength, accuracy and marginal integrity.Type: GrantFiled: April 28, 2011Date of Patent: June 12, 2012Assignee: Ivoclar Vivadent AGInventors: Markus Heinz, Klaus Rinner, Georg Gorfer, Marius Aster, Marcel Schweiger, Dmitri Brodkin
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Patent number: 8178012Abstract: 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: GrantFiled: March 13, 2007Date of Patent: May 15, 2012Assignee: Ivoclar Vivadent AGInventors: Ajmal Khan, Carlino Panzera, Dmitri G. Brodkin
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Patent number: 8177416Abstract: 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: GrantFiled: February 13, 2009Date of Patent: May 15, 2012Assignee: Ivoclar Vivadent AGInventor: Wolfgang Müller
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Patent number: 8173562Abstract: 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: GrantFiled: June 13, 2008Date of Patent: May 8, 2012Assignee: Ivoclar Vivadent AGInventors: Wolfram Höland, Christian Ritzberger, Elke Apel, Frank Rothbrust, Jerome Chevalier, Dmitri Brodkin
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Patent number: 8162664Abstract: 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: GrantFiled: July 1, 2011Date of Patent: April 24, 2012Assignee: Ivoclar Vivadent AGInventors: Elke Apel, Wolfram Holland, Marcel Schweiger, Christian Ritzberger, Harald Burke, Volker Rheinberger
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Patent number: 8133831Abstract: 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: GrantFiled: July 7, 2009Date of Patent: March 13, 2012Assignee: Ivoclar Vivadent AGInventors: Jurgen Laubersheimer, Gianluca Zappini, Volker M. Rheinberger
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Patent number: 8080189Abstract: 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: GrantFiled: January 27, 2005Date of Patent: December 20, 2011Assignee: Ivoclar Vivadent AGInventors: Frank Rothbrust, Christian Ritzberger, Wolfram Höland, Volker Rheinberger
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Patent number: 8071131Abstract: 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: GrantFiled: July 11, 2005Date of Patent: December 6, 2011Assignee: Ivoclar Vivadent, Inc.Inventor: Bruce Rutherford
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Patent number: 8072588Abstract: 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: GrantFiled: October 22, 2008Date of Patent: December 6, 2011Assignee: Ivoclar Vivadent AGInventors: Wolfgang Plank, Bruno Senn
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Patent number: 8067482Abstract: 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: GrantFiled: March 2, 2007Date of Patent: November 29, 2011Assignee: Ivoclar Vivadent AGInventors: Volker Rheinberger, Wolfgang Wachter, Gottfried Rohner
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Patent number: 8057231Abstract: 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: GrantFiled: November 24, 2007Date of Patent: November 15, 2011Inventor: Brian D. Viscomi
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Patent number: 8047021Abstract: 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: GrantFiled: November 5, 2007Date of Patent: November 1, 2011Assignee: Ivoclar Vivadent AGInventors: Marcel Schweiger, Volker M. Rheinberger, Harald Burke, Wolfram Holand
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Patent number: D653340Type: GrantFiled: March 11, 2010Date of Patent: January 31, 2012Assignee: Ivoclar Vivadent AGInventors: Reinhard Goerge, Wolfram Murr, Sonja Jäger
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Patent number: D674095Type: GrantFiled: June 18, 2010Date of Patent: January 8, 2013Assignee: Ivoclar Vivadent AGInventors: Robert A. Ganley, Dmitri Brodkin