Dental Utility Patents (Class 522/908)
  • Patent number: 8993652
    Abstract: A dual-cure curable material kit comprising: (A) a radical-polymerizable monomer component; (B) a photopolymerization initiator component comprising (b1) an ?-diketone compound, (b2) an aliphatic tertiary amine compound having a tertiary amino group in which three saturated aliphatic groups are bonded to a nitrogen atom and one of the saturated aliphatic groups has an electron-withdrawing group as a substituent, and (b3) an s-triazine compound having a trihalomethyl group as a substituent, or a diaryliodonium salt compound; and a chemical polymerization initiator component (C) comprising (c1) an organic peroxide, and (c2) an N,N-di(hydroxyalkyl)-p-toluidine compound; which is packed separately at least in two packages so that the component (b2) and the component (b3) of the photopolymerization initiator component (B) are not packed together in a single package and the component (c1) and the component (c2) of the chemical polymerization initiator component (C) are not packed together in a single package.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: March 31, 2015
    Assignee: Tokuyama Dental Corporation
    Inventors: Kyoichi Fujinami, Kazuhiko Okishio
  • Patent number: 8721844
    Abstract: Dental curing systems, apparatuses, and methods may include a light source, a perforated plate, and a dental composite. The perforated plate may be positioned between the light source and the dental composite. The perforated plate may include a plurality of perforations that convert a first curing light beam from the light source into multiple curing light beams before reaching the dental composite. The multiple curing light beams come in contact with the dental composite to begin the curing process at certain locations on the dental composite. The perforated plate may then be removed, and a second curing light beam from the light source may be applied to the dental composite to complete the curing process.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: May 13, 2014
    Inventor: Mohammad Al Rifai
  • Patent number: 8703840
    Abstract: The present invention provides a dental adhesive material kit having excellent bond durability. The present invention is represented by a dental adhesive material kit containing a dental aqueous adhesive composition (A) and a multi-part type dental nonaqueous curable composition (B). The dental aqueous adhesive composition (A) contains a polymerizable monomer (a) having an acidic group, an aliphatic polymerizable monomer (b) having no acidic group, water (c), and an amine-based reducing agent (d1) containing no sulfur atom. The multi-part type dental nonaqueous curable composition (B) contains an aliphatic polymerizable monomer (b) having no acidic group, an aromatic polymerizable monomer (e) having no acidic group, a powdery water-soluble reducing compound (f) containing a sulfur atom, an organic peroxide (g), and an amine-based reducing agent (d2) containing no sulfur atom.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: April 22, 2014
    Assignee: Kuraray Noritake Dental Inc.
    Inventors: Michiya Kawana, Hidemi Nakayama, Mitsuru Takei, Kenji Suzuki, Ai Hinamoto
  • Patent number: 8552088
    Abstract: A cement for dental use, containing a first agent and a second agent, wherein both of the first agent and the second agent contain a polymerizable monomer (a) and a filler (b), wherein the first agent and/or the second agent further contains a photopolymerization initiator (c), wherein further as a chemical polymerization initiator (d), either one of the first agent and the second agent contains an oxidizing agent (f) and the other contains a reducing agent (g), the oxidizing agent (f) and the reducing agent (g) constituting a redox polymerization initiator, wherein the photopolymerization initiator (c) contains an ?-diketone, and the photopolymerization initiator (c) is contained in a total amount of from 0.010 to 0.100 parts by weight, based on 100 parts by weight of the total amount of the polymerizable monomer (a), wherein the chemical polymerization initiator (d) is contained in a total amount of from 0.
    Type: Grant
    Filed: December 25, 2008
    Date of Patent: October 8, 2013
    Assignee: Kuraray Noritake Dental Inc.
    Inventors: Hiroki Shinoda, Mitsuru Takei, Hidemi Nakayama
  • Patent number: 8519019
    Abstract: The invention relates to dental compositions which can be used to produce dental prostheses and for dental restoration.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: August 27, 2013
    Assignee: Bluestar Silicones France SAS
    Inventors: Didier Dhaler, Jean-Marc Frances
  • Patent number: 8426491
    Abstract: Dental compositions comprising a polymerizable compound, filler system of nanometer-sized silica particles, and polymerization system capable of being activated by light are provided. The compositions further contain a solvent such as a mixture of 1-butanol and acetone and may contain water. The nanometer-sized silica particles, having an average particle size of about 1 nm to about 100 nm, are uniformly dispersed within the resin. The compositions can be applied as a polish, sealant, bleach guard, or other coating material to the surfaces of dental restorations and teeth. Self-etching and non-self-etching compositions are provided. The cured coating forms a protective, durable film that enhances the shine and luster of the restorations and teeth.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: April 23, 2013
    Assignee: DENTSPLY International Inc.
    Inventors: Xin Huo, Michael O'Connor, Robert Size
  • Patent number: 8263681
    Abstract: The invention features a dental composition containing a polycyclic aromatic compound, such as 2-ethyl 9,10-dimethoxy anthracene (EDMOA), in an amount that provides the composition with fluorescence mimicking that of natural teeth.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: September 11, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Bradley D. Craig, Gregory A. Kobussen
  • Patent number: 8106109
    Abstract: The invention concerns a dental filling material with dual hardening mechanism, wherein i) a first hardening mechanism is based on a photocuring reaction, preferably a radical reaction, and ii) a second hardening mechanism is dependent on H2O as a reactant, especially as a ligand. Preferably, the second hardening mechanism is a gypsum-type reaction. Owing to the expansion of the composition an excellent marginal seal can be achieved, while the first hardening mechanism allows for a rapid cure on demand.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: January 31, 2012
    Assignee: Coltene Whaledent AG
    Inventors: Ralf Böhner, Dierk Lübbers, Silvan Benz
  • Patent number: 8063115
    Abstract: A radiation curable composition comprising a curable compound, a photo-initiator and a co-initiator, wherein said co-initiator has a structure according to Formula I A-L-B??Formula I wherein A represents a structural moiety comprising an aromatic tertiary amine; B represents a structural moiety comprising at least one aliphatic tertiary amine; L represents a divalent linking group positioning the nitrogen atom of the aromatic amine of the structural moiety A and the nitrogen of at least one aliphatic amine of the structural moiety B in a 1-3 to 1-23 position; with the proviso that at least one aromatic and at least one aliphatic amine each have at least one alfa-hydrogen.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: November 22, 2011
    Assignee: Agfa Graphics NV
    Inventors: Johan Loccufier, Roland Claes
  • Patent number: 8053490
    Abstract: A dental filler and dental resin restorative composition containing the dental filler is provided. The dental filler is prepared by pre-treating an acid-reactive filler with a polymerizable monomer or oligomer pre-treatment chemical having at least one acid or acid-precursor functional group, at least one polymerizable unsaturated carbon-carbon bond, and a molecular weight of about 1,000 grams per mole or less.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: November 8, 2011
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Weitao Jia, Shuhua Jin
  • Patent number: 7939580
    Abstract: The present invention relates to dental compositions comprising a halogenated epoxy functional ether derivative comprising at least one aryl alkyl ether moiety, at least one halogen atom attached to each aryl residue of the aryl alkyl ether moieties, at least two aliphatic epoxy moieties, no glycidyl ether structure, an initiator, optionally filler and optionally additive components selected from the group of modifiers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavorings.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: May 10, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Adrian S. Eckert, Peter Bissinger, Karsten Dede, Thomas Klettke, Christoph Thalacker, Dwight W. Jacobs, Roger A. Mader
  • Patent number: 7893129
    Abstract: Stable, highly filled cationic dental compositions useful for the production of dental prostheses and dental restoration materials contain: (1) at least one compound which is reactive cationically when activated, advantageously at least one UV- and cationically reactive oxirane-functionalized silicone; (2) at least one dental filler, advantageously SiO2; (3) at least one organic polymer or copolymer dispersant having an amine index less than or equal to 100 mg of potassium hydroxide per gram of dispersant, advantageously a polyurethane/acrylate copolymer or alkylammonium salt thereof; (4) at least one cationic photoinitiator, advantageously iodonium borate; and (5) optionally, at least one photosensitizer.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: February 22, 2011
    Assignee: Bluestar Silicones France SAS
    Inventor: Jean-Marc Frances
  • Patent number: 7893130
    Abstract: Dental compositions are described which are photocurable by radiation with a wavelength greater than 390 nm. The compositions include a cationically active compound, a dental filler, optionally a dispersant, a cationic photoinitiator and a photosensitizer which is a thioxanthone salt substituted by at least one group containing an ammonium function. The composition has the advantage of remedying the color stability problems of finished dental products after crosslinking.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: February 22, 2011
    Assignee: Bluestar Silicones France SAS
    Inventor: Jean-Marc Frances
  • Patent number: 7825167
    Abstract: The invention relates to a dental composition comprising a) halogenated aryl alkyl ether component (A) comprising at least 1 aryl alkyl ether moiety, at least 1 halogen atom attached to each aryl residue of the aryl alkyl ether moieties, at least 2 unsaturated moieties, b) Si—H functional component (B), c) initiator (C), d) optionally filler (D), and e) optionally component (E) selected from modifiers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickness, surfactants, odorous substances, diluting agent(s) and flavourings.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: November 2, 2010
    Assignee: 3M Espe AG
    Inventor: Adrian S. Eckert
  • Patent number: 7812064
    Abstract: A radiation curable phase change ink comprising a white colorant; a colorant dispersant; and an ink vehicle comprising at least one curable monomer; at least one gellant; optionally at least one photoinitiator; optionally at least one stabilizer; and optionally at least one wax.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: October 12, 2010
    Assignee: Xerox Corporation
    Inventors: Peter G. Odell, Jennifer L. Belelie, Hadi K. Mahabadi, Christopher A. Wagner, C. Geoffrey Allen
  • Patent number: 7776940
    Abstract: Hardenable and hardened dental compositions, and articles including such hardenable and hardened compositions, are provided. In some embodiments, the hardenable dental compositions include an acid-generating component and an acid-reactive component including one or more acid-reactive groups. Upon irradiating, and optionally heating, the hardened compositions are useful, for example, for reducing the bond strength of orthodontic appliances adhered to tooth structures with the hardened compositions.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: August 17, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Rajdeep S. Kalgutkar, Joan V. Brennan, Babu N. Gaddam
  • Patent number: 7766654
    Abstract: A device (10) and method for determining and controlling the degree of polymerization of polymerizable dental material (14), which device includes a light and/or heat source (18 or 20), with which the dental material (14) is impinged. The device further includes a control device (26) and a sensor (24) connected to the control device (26), whereby the sensor (24) detects radiation (natural radiation) emitted from the dental material (14) of a predetermined wavelength.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: August 3, 2010
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfgang Plank, Reinhard Goerge
  • Patent number: 7659324
    Abstract: Dental materials which contain a radically polymerizable organic binder, at least one radical polymerization initiator and at least one radical polymerization accelerator, both the initiator and the accelerator each having at least one radically polymerizable group.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: February 9, 2010
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Urs Karl Fischer, Peter Burtscher, Jörg Angermann, Volker M. Rheinberger
  • Patent number: 7615582
    Abstract: A hydrophobic acidic group-containing polymeric monomer (a); a water-soluble polymeric monomer (b); water (c); a photopolymerization initiator (d); an aromatic tertiary amine (e) having an electron-withdrawing group; a cross-linkable polymeric monomer (f); and a basic compound (g) for producing a water-soluble salt through a reaction with a part of the hydrophobic acidic group-containing polymeric monomer (a) are included as essential compounding ingredients. A one-part dental adhesive composition that exhibits high adhesive strength and high storage stability in adhesion between a teeth, and more particularly enamel or dentine, and a dental repairing material, and more particularly a resin material, is provided.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: November 10, 2009
    Assignee: Kuraray Medical Inc.
    Inventors: Kazumitsu Nakatsuka, Naoki Nishigaki
  • Patent number: 7605190
    Abstract: Composition with at least one polymerizable binder and at least one polymerization initiator, which contains at least one acylgermanium compound according to general Formula (I), in which R0 is a substituted or unsubstituted C1-18-alkyl radical or an acyl group; R1 and R2 are H, an acyl group or have one of the meanings given for R3; R3 is a branched or linear C1-18-alkyl radical which can be unsubstituted or substituted one or more times by —O—, —NH—, —NR—, —S— or interrupted by other groups, trimethylsilyl, hal-(CH3)2Si—[OSi(CH3)2]r?, (CH3)3Si—[OSi(CH3)2]r—, —COOH, —COO—R10, —CO—NR11R12, —CO-vinyl, —CO-phenyl, phenyl-C1-4-alkyl, phenyl, naphthyl or biphenyl, C5-12 cycloalkyl, a 5 or 6-membered O, S or N-containing heterocyclic ring, halogen, OH, an aromatic C6-30 radical which can be substituted or unsubstituted and/or interrupted by O, S or —NR—, or a branched, cyclic or linear C1-20 alkyl, -alkenyl, -alkoxy or -alkenoxy radical; m is 1, 2 or 3; n is 0 or 1 and p is 0 or 1; wherein in each case two of
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: October 20, 2009
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Ulrich Salz, Urs Karl Fischer, Robert Liska, Heinrich Gruber, Beate Ganster
  • Patent number: 7495037
    Abstract: Polymerizable materials which contain (1) 1 to 80 wt.-% of at least one polysiloxane, (2) 0.1 to 5 wt.-% of one or more initiators for radical polymerization, (3) 0 to 60 wt.-% of radically polymerizable monomer and (4) 1 to 50 wt.-% of one or more radically polymerizable monomers which carry at least phosphonic acid group, sulphonic acid group and/or mono- or dihydrogen phosphoric acid ester group, the polysiloxane (1), the monomer (3) or both being substituted by fluorine. The materials are suitable in particular for the coating of natural or artificial teeth.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: February 24, 2009
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Simone Klapdohr, Ulrich Salz, Jörg Zimmermann, Volker M. Rheinberger, Rolf Mülhaupt
  • Patent number: 7465758
    Abstract: Polymerizable compositions and methods are provided that include an ethylenically unsaturated compound and an arylsulfinate salt. The polymerizable compositions are useful as hardenable dental compositions.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: December 16, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Afshin Falsafi, Rajdeep S. Kalgutkar, Joel D. Oxman
  • Patent number: 7304096
    Abstract: There is provided a highly functional one-step light-curing dental adhesive composition i) based on a multifunctional prepolymer mixture of 2,2-bis-[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane (“Bis-GMA”) and a multifunctional prepolymer formed by substitiuting hydrogen atoms of hydroxyl groups present in Bis-GMA molecules with methacrylate groups, in which the Bis-GMA is used as a base prepolymer of conventional dental adhesive compositions; and ii) comprising and acidic monomer for removing a portion of smear layer, which is allowed to be bonded without separate treatment of acid etchant, an adhesive monomer having both hydrophobic and hydrophilic properties, a hydrophilic monomer which is allowed to be bonded in the present of moisture, an inorganic filler for improving mechanical properties, diluent, water for demineralization, a photoinitiation system and other additives.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: December 4, 2007
    Assignee: Korea Institute of Science and Technology and Dentkist, Inc.
    Inventors: Dong Keun Han, Kyu Hyun Baek, Min Sung Kim, Sang Soon Park, Hyun Chul Goo, Choong Ho Kim
  • Patent number: 7247660
    Abstract: The invention concerns dental compositions. Said composition comprises (1) a silicone crosslinkable and/or polymerizable by cation process; (2) an efficient amount of at least an initiator such as onium borate; (3) at least a photosensitizer ; and (4) a dental filler present in the composition in a proportion of at least 10 wt. % relative to the composition total weight. Said dental compositions are useful for making dental prostheses or for dental restoration.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: July 24, 2007
    Assignee: Rhodia Chimie
    Inventor: Jean-Marc Frances
  • Patent number: 7232852
    Abstract: A visible light cationically photopolymerizable composition is provided. This composition includes an expanding monomer and a dioxirane. More specifically, the expanding monomer used in this composition is one or more dioxiranyl tetraoxaspiro[5.5]undecanes. The composition of the present invention may be used as a matrix resin for dental restorative materials. Another embodiment of the present invention is various novel dioxiranyl tetraoxaspiro[5.5]undecanes.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: June 19, 2007
    Assignee: Curators of the University of Missouri
    Inventors: Cecil C. Chappelow, Charles S. Pinzino, J. David Eick, Andrew J. Holder, Shin-Shi Chen, Li Jeang
  • Patent number: 7129281
    Abstract: The present invention provides a one-bottle dental bonding composition that provides a bonding layer excellent in bonding strength, independent of the skill of the practitioners, and, more preferably, that releases fluoride ion gradually into oral cavity over an extended period of time. The one-bottle dental bonding composition comprises a radical polymerizable monomer (A) having an acidic group in the molecule, another radical polymerizable monomer (B), a photopolymerization initiator (C) and a water-soluble organic solvent (D), and is substantially free of water.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: October 31, 2006
    Assignee: Dentsply-Sankin K.K.
    Inventor: Satoshi Fujiwara
  • Patent number: 6964985
    Abstract: The present invention provides a dental material that includes a hardenable resin system and a first initiator system capable of hardening the hardenable resin.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: November 15, 2005
    Assignee: 3M Innovative Properties Co.
    Inventors: Naimul Karim, Joel D. Oxman, Ahmed S. Abuelyaman, Babu N. Gaddam
  • Patent number: 6953832
    Abstract: Dental material containing an amide of the general formula BXn in which B stands for a hydrocarbon radical with 1 to 5 carbon atoms, which can contain one or more of the groups O, S, NH, CO—NH, O—CO—NH and/or NH—CO—NH, and which is substituted n times with the group X, X stands for the group which is bound via the nitrogen atom or via C-2 to the radical B, the bond site not connected to B carrying a radical R2, R1 being hydrogen, an alkyl group with 1 to 20 carbon atoms or a phenyl radical, two or more radicals X being able to share a radical R1 and R1 also being able to be a constituent of the radical B, R2 being hydrogen, an alkyl group with 1 to 20 carbon atoms or a phenyl radical, and n being a number from 2 to 5.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: October 11, 2005
    Assignee: Ivoclar Vivadent AG
    Inventors: Norbert Moszner, Frank Zeuner, Volker Rheinberger, Jörg Angermann, Thomas Völkel
  • Patent number: 6880296
    Abstract: A visible light photopolymerizable composition comprising a) an aryliodonium salt and b) a titanocene derivate. These compositions can be used together with an epoxide resin as a dental composition.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: April 19, 2005
    Assignee: S & C Polymer Silicon- und Composite-Spezialitaten GmbH
    Inventors: Juergen Engelbrecht, Gunther Groeger, Wolfram Ziegler
  • Patent number: 6818682
    Abstract: The inventive dental composition comprises (a) a part A comprising at least one polyacid and at least one polymerizable component; and (b) a part B comprising water, wherein the composition further comprises an oxidizing agent, a reducing agent, and reactive fillers in at least one of part A or part B and wherein at least one of the polyacid, oxidizing agent, and reducing agent is in a disperse phase. The dental composition can be used in many dental applications and is particularly suited for use as a cement.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: November 16, 2004
    Inventors: Afshin Falsafi, Mark S. Konings, Joel D. Oxman, Richard P. Rusin, Edward J. Winters
  • Patent number: 6812266
    Abstract: A dental adhesive composition for bonding dental restoratives to dentin and enamel provides a one-part self-etching, self-priming dental adhesive composition having hydrolysis stable polymerizable acidic adhesive monomers.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: November 2, 2004
    Assignee: Dentsply DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz
  • Patent number: 6790877
    Abstract: An antibacterial bonding compositions for dental use, which comprises (A) an antibacterial primer that comprises an antibacterial polymerizable monomer having an ethylenic unsaturated group and at least one or more cationic groups selected from the group consisting of ammonium bases, pyridinium bases and phosphonium bases, and a volatile solvent, and (B) an adhesive composition comprising an acid group having polymerizable monomer, a polymerizable monomer, and a polymerization initiator; and an adhesive compositions for dental use, which comprises (P) an adhesive primer comprising an acid group having polymerizable monomer, a hydrophilic polymerizable monomer, and water, and (Q) a bonding agent comprising a polymerizable monomer, and an acylphosphine oxide compound and an &agr;-diketone compound both serving as a polymerization initiator.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: September 14, 2004
    Assignee: Kuraray Co., Ltd.
    Inventors: Kazumitsu Nakatsuka, Koichi Okada, Satoshi Imazato, Shigeyuki Ebisu, Yasuhiko Tsuchitani
  • Patent number: 6783810
    Abstract: A photopolymerizable material is exposed to light to effect curing. A portion of the material is exposed to light in a conventional manner, while at least one other portion of the material is masked from direct exposure to the light by use of a mask (10) having at least one mask segment (11) which either completely or at least partially blocks the light. In this manner, the polymerization stress associated with the cured materials is limited or minimized due to extended molecular relaxation promoted by this controlled or hybrid curing technique. Also according to the invention, different segments (30, 31) of a material to be cured (22) are exposed to different wavelengths of light energy (21) or one such segment (30, 31) is exposed to light energy while another such segment is not.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: August 31, 2004
    Assignee: Dentsply Research & Development Corp.
    Inventors: Xiaoming Jin, Paul D. Hammesfahr
  • Patent number: 6767935
    Abstract: The invention relates to the utilization of an adhesive system containing at least one component i) which is capable of initiating cationic polymerization and is selected from unsaturated carbonic acids and their anhydrides or acid chlorides, unsaturated phosphoric acids and their esters, unsaturated phosphonic acids and their esters, unsaturated sulfonic acids and their esters, and strong inorganic acids, and at least one component, ii) that can undergo cationic polymerisation for the hardening of radical or cationic or radical and cationically curable materials on laminated fabric which contains water.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: July 27, 2004
    Assignee: 3M ESPE AG
    Inventors: Thomas Luchterhandt, Rainer Guggenberger, Hendrik M. Grupp
  • Patent number: 6765036
    Abstract: Photopolymerizable compositions comprise a cationically polymerizable resin and a photoinitiator system comprising: (i) an iodonium salt; (ii) a visible light sensitizer; and (iii) an electron donor compound having an oxidation potential less than that of 1,4-dimethoxybenzene when measured versus a saturated calomel electrode, wherein the photoinitiator system has a photoinduced potential of less than that of 3-dimethylaminobenzoic acid in a standard solution of 2.9×10−5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5×10−5 moles/g camphorquinone in 2-butanone. The compositions polymerize on exposure to light in the visible spectrum and are useful in a variety of applications, including dental adhesives and dental composites.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: July 20, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Karsten Dede, Thomas Klettke, Thomas Luchterhandt, Joel D. Oxman
  • Patent number: 6750268
    Abstract: A tooth treated with a bonding composition with high initial bonding strength and good bonding durability comprising a mixture of polymerizable compound having an acid group, a water-soluble film-forming agent, water, and a curing agent, in which the calcium salt of the acid is insoluble in water, and the film-forming agent is a polymerizable compound miscible with a physiological saline solution, does not require any pre-treatment such as acid-etching or priming treatment.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: June 15, 2004
    Assignee: Kuraray Co., Ltd.
    Inventor: Kenichi Hino
  • Patent number: 6747071
    Abstract: The invention concerns dental compositions. Said composition comprises (1) a silicon crosslinkable and/or polymerizable by cation process; (2) an efficient amount of at least an initiator such as onium borate; (3) at least a photosensitizer; and (4) a dental filler present in the composition in a proportion of at least 10 wt. % relative to the composition total weight. Said dental compositions are useful for making dental prostheses or for dental restoration.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: June 8, 2004
    Assignee: Rhodia Chimie
    Inventor: Jean-Marc Frances
  • Patent number: 6649669
    Abstract: A single solution bonding formulation for dental applications comprising a plurality of at least one self-polymerizable polyvinyl acidic monomer or at least two different polymerizable polyvinyl acidic monomers, a calcium phosphate filler, at least one photoinitiator, optionally an accelerator, optionally a solvent, and optionally a fluoride additive is provided. Additionally, a method for treating enamel, dentin, and/or pulp with the same single solution bonding formulation is provided. The single solution bonding formulation provides for the release of calcium, phosphate and/or fluoride ions which are sufficient in situ to form hydroxyapatite and/or fluorapatite.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: November 18, 2003
    Assignee: American Dental Association Health Foundation
    Inventor: Sabine Dickens
  • Patent number: 6641398
    Abstract: Dental material containing a polymerizable component and a component applied superficially to the polymerizable component, which can be removed after the curing of the polymerizable material with accompanying formation of a rough surface.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: November 4, 2003
    Assignee: Ivoclar Vivadent AG
    Inventors: Konrad Hagenbuch, Gerhard Zanghellini
  • Patent number: 6624211
    Abstract: The present invention provides a dental material that includes a hardenable resin system and a first initiator system capable of hardening the hardenable resin.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: September 23, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Naimul Karim, Joel D. Oxman, Ahmed S. Abuelyaman, Babu N. Gaddam
  • Patent number: 6610759
    Abstract: An adhesive composition that includes a mixture of a cationically polymerizable component, an acidic component, and an initiator is provided. Preferably, the initiator comprises an iodonium salt, a visible light sensitizer, and an electron donor compound, wherein the initiator has a photoinduced potential greater than or equal to that of N,N-dimethylaniline in a standard solution of 2.9×10−5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5×10−5 moles/g camphorquinone in 2-butanone. This adhesive composition is cationically polymerizable and is able to bond to hard tissue and cationic restorative materials upon curing.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: August 26, 2003
    Assignees: Curators of the University of Missouri, 3M Innovative Properties Company
    Inventors: Cecil C. Chappelow, Charles S. Pinzino, J. David Eick, James Code, Joel D. Oxman, Sharon M. Rozzi
  • Patent number: 6605651
    Abstract: This invention provides a method and material compositions for producing objects containing in whole, or in part, biomedical polymers, especially those having dental use. Microwave sensitive material compositions are injected under pressure into a mold, the mold containing a replica of a body tissue or tissues. While hydraulic pressure is maintained on the material, a microwave source emits metered electromagnetic energy for hardening the material in the 3-dimensionally defined space. For dental and other applications, the mold making, injection and hardening are done sequentially to rapidly produce an object which accurately fits the mold.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: August 12, 2003
    Assignee: Biomat Sciences, Inc.
    Inventors: Ivan Stangel, Jingwei Xu
  • Patent number: 6599960
    Abstract: The invention relates to preparations with improved curing behavior, which are characterized in that they contain 0.0005 to 50 wt. % of soluble and/or fine-particle organic and/or inorganic alkaline earth and/or alkali metal compounds. The preparations according to the invention may be used for bonding, sealing, casting and coating substrates, also in medical dental and technical dental preparations, and for making impressions of articles and, more particularly, for making dental impressions.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: July 29, 2003
    Assignee: Espe Dental AG
    Inventors: Gunther Eckhardt, Gunther Lechner, Erich Wanek, Ursula Somnitz
  • Patent number: 6583197
    Abstract: A dental adhesive composition comprising: (A) 100 parts by weight of a polymerizable unsaturated monomer containing 5% by weight or more of a radical polymerizable monomer having an acid group; (B) 35 to 100 parts by weight of an acid-reactive filler; (C) 35 to 100 parts by weight of water; (D) 5 to 100 parts by weight of a water-soluble organic solvent; and, (E) 0.1 to 10 parts by weight of a polymerization catalyst.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: June 24, 2003
    Assignee: Kabushiki Kaisha Shofu
    Inventors: Tohru Wada, Kunio Ikemura, Yoshiaki Kouro, Katsuya Kimoto, Kazuya Shinno
  • Patent number: 6575750
    Abstract: Among other things, a dental embedding material is proposed, containing: 10-30 wt.-% polyethylene glycol dimethacrylate 40-55 wt.-% polymethyl methacrylate 5-15 wt.-% highly disperse silicon dioxide <1 wt.-% photoinitiators, stabilizers, 10-30 wt.-% of at least one compound from the group: urethane dimethacrylate, bis-GMA, ethoxylated bis-GMA.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: June 10, 2003
    Assignee: Heraeus Kulzer GmbH & Co. KG
    Inventors: Albert Erdrich, Frank Stange, Novica Savic, Bettina Korthaus
  • Patent number: 6541040
    Abstract: The invention relates to a mixture for use as wound dressing, which comprises: a) paraffins complying with DAB and/or synthetic waxes selected from the group consisting of montan waxes, petroleum waxes, Fischer-Tropsch waxes, polyolefin waxes, petrolatum, wax alcohols, and oxidates of the aforementioned substances; b) at least one metal hydroxide. The mixture is stable on prolonged storage at room temperature and promotes collagen regeneration in vivo in cases of bone trauma.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: April 1, 2003
    Assignee: Ernst Milbauer KG
    Inventor: Wolfgang Mühlbauer
  • Patent number: 6506815
    Abstract: A resin composition for denture is provided, which does not require operations for weighing, and mixing during the use; is free from involving of air bubbles; and when used for preparation of a denture base, is free from a reduction in physical properties and staining or discoloration with a lapse of time. Further, a completed denture has a high elastic energy value, is superior in impact resistance, and when applied with an impact or a stress as in the case of dropping, is not readily broken. The resin composition for denture base is in a one-paste state and is constructed by (a) a polymerizable monomer and/or oligomer having a modulus of elasticity at polymerization of 0.25 to 3.00 GPa, (b) an organic filler and/or an organic-inorganic composite filler having a modulus of elasticity of 0.25 to 3.00 GPa, and (c) a polymerization initiator made of a heat polymerization type polymerization initiator and/or a photopolymerization type polymerization initiator, and optionally, (d) an inorganic filler.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: January 14, 2003
    Assignee: GC Corporation
    Inventors: Yutaka Shinozaki, Tomohiro Kumagai
  • Patent number: 6482871
    Abstract: The invention provides a pretreatment method and primer that is applied directly to the hard tissue. The invention has particular utility for adhering to or coating sclerotic dentin and cervical enamel or for adhering to or coating hard tissue in a high humidity environment. The primer enables formation of extremely strong bonds to dentin. The method comprises the steps of: (a) applying to the hard tissue adhesively effective amounts of an acid and a water-dispersible film former comprising a polymer and (b) hardening the film former. Primer compositions are provided for use in this method, comprising a mixture of an acid and a film former comprising a polymer prior to hardening, the mixture being in the form of a film atop the hard tissue.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: November 19, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Steven M. Aasen, F. Andrew Ubel, III, Joel D. Oxman, Sumita B. Mitra, Jon W. Fundingsland
  • Patent number: 6482004
    Abstract: A light curing device has a light source for curing light-polymerizable dental materials. A control circuit controls the light output of the light source according to a pre-determined output profile. The output profile has a starting time period with a decreased output relative to a maximum output, followed by a main curing time period. In the main curing time period, a pulsed output with alternating high output value and low output value is provided.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: November 19, 2002
    Assignee: Ivoclar AG
    Inventors: Bruno Senn, Gottfried Rohner, Peter Burtscher
  • Patent number: 6465541
    Abstract: Polymerizable composition that include: (a) a cationically active functional group; (b) an initiation system capable of initiating cationic polymerization of the cationically active functional group; and (c) a filler composition that includes various radiopacifying fillers in an amount sufficient to render the polymerizable composition radiopaque. Components (a), (b), and (c) are selected such that the polymerizable composition polymerizes to form a polymerized composition having a Barcol hardness, measured using a GYZJ-935 meter, of at least 10 within 30 minutes following initiation of the cationically active functional group are a reaction temperature of 25° C.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: October 15, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Kathyrn R. Bretscher, Richard P. Rusin, Sumita B. Mitra, Janis R. Gust, Cheryl A. Hayne, Dwight W. Jacobs, David A. Kaisaki