Cement Or Filling Composition Patents (Class 523/116)
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Patent number: 8513326Abstract: The present invention relates, generally, to monomers containing carbamate-methacrylates or derivatives of carbamate-methacrylates, processes for making the monomers, and compositions comprising the monomers. The present invention also relates to methods of using the monomers, such as in dental applications, and in particular, dental restorative resins.Type: GrantFiled: April 8, 2010Date of Patent: August 20, 2013Assignee: Septodont Confi-DentalInventors: Marianela Trujillo-Lemon, Kristin Lindsay Wall, Kristina Esquibel, Jordan Boulden, Amy J. Docktor, Zachary R. Shelton, Cora Bracho-Troconis
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Publication number: 20130210960Abstract: The present invention relates to a composition comprising: a) a first component comprising a poly(methyl met 5 hacrylate) (PMMA), a contrast agent, a radical donor and calcium based particles; and b) a second component comprising methyl methacrylate (MMA), a radical scavenger, and a polymerization accelerator; wherein the composition has an average setting time of about 13 minutes.Type: ApplicationFiled: July 26, 2011Publication date: August 15, 2013Applicant: WARSAW ORTHOPEDIC, INCInventors: Samuel Lee, Joerg Meyer, Robert Wenz, Thomas A. Slater, Ann M. Heike
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Patent number: 8506298Abstract: Provided is a dental filling/restoration kit, in which a pretreatment material and a filling/restoring material can be cured by only one irradiation with light, which enables further improved adhesion between a tooth and the filling/restoring material, which prevents the filling/restoring material from being easily colored, to thereby exhibit its excellent sensuousness. Specifically provided is a dental filling/restoration kit which includes: a filling/restoring material (A) containing 100 parts by mass of a radical-polymerizable monomer (a) containing 3 to 30 parts by mass of a water-soluble radical-polymerizable monomer having no acidic group (a1), a photopolymerization initiator (b), and a filler (c), the filler (c) being contained in an amount of 80 to 2,000 parts by mass relative to 100 parts by mass of the radical-polymerizable monomer (a); and a pretreatment material (B) containing a radical-polymerizable monomer having an acidic group (d) and water (e).Type: GrantFiled: June 5, 2008Date of Patent: August 13, 2013Assignee: Tokuyama Dental CorporationInventors: Takeshi Suzuki, Hideki Kazama
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Publication number: 20130203884Abstract: The present invention relates to dental polymerizable composite materials (curable dental compositions) comprising one or more plasticizers comprising a tricyclic structural element, to dental materials (polymers), obtainable by curing from the dental polymerizable composite materials comprising one or more plasticizers comprising a tricyclic structural element, to processes for producing a dental material and to dental curable composite materials for use in a therapeutic method in the production of a dental material.Type: ApplicationFiled: February 1, 2013Publication date: August 8, 2013Applicant: VOCO GMBHInventor: VOCO GmbH
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Patent number: 8501834Abstract: A dual-curing, multi-component dental composition is described. The dental composition can include: (a) one or more photopolymerizable monomers selected from the group consisting of acrylates and methacrylates; (b) one or more photoinitiators, selected from the group consisting of alpha-diketones, benzoin alkyl ethers, thioxanthones, benzophenones, acylphosphinoxides, acetophenones, ketals, titanocenes, borates and sensitizing colorants; (c) one or more molecular weight regulators selected from the group consisting of compounds which can be converted with a radical of a monomer of component (a), wherein the conversion takes place by abstraction of an H-radical from the molecular weight regulator in the allyl position; (d) one or more polymerization inhibitors for increasing the storage stability of the composition; (e) one or more inorganic fillers; (f) one or more initiators for a chemical curing at ambient temperature, and if necessary one or more further additives.Type: GrantFiled: April 12, 2011Date of Patent: August 6, 2013Assignee: VOCO GmbHInventors: Reinhard Maletz, Wigand Krumme, Manfred Thomas Plaumann
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Publication number: 20130197126Abstract: The present invention relates to a paste, a kit, and the use of the paste for mechanical fixation of articular endoprostheses. The paste contains at least one polymer for radical polymerisation, at least one polymer that is soluble in at least one monomer for radical polymerisation, and at least one filling agent that is poorly soluble or insoluble in at least one monomer for radical polymerisation, whereby the filling agent is a particulate cross-linked polymethacrylate produceable through polymerisation of methacrylic acid esters, whereby i) at least 15% by weight of the methacrylic acid esters used for polymerisation are multi-functional methacrylic acid esters, relative to the total weight of the methacrylic acid esters used in the polymerisation, and ii) at least 90% by weight of the particles of the filling agent, relative to the total weight of the filling agent, have a particle size of no more than 74 ?m.Type: ApplicationFiled: January 29, 2013Publication date: August 1, 2013Applicant: Heraeus Medical GmbHInventor: Heraeus Medical GmbH
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Patent number: 8497312Abstract: An adhesive composition comprising (A) a polymerizable monomer component containing not less than 5% by mass of an acidic group-containing polymerizable monomer, (B) a polyvalent metal ion-eluting filler, (C) a volatile organic solvent, and (D) water, wherein the polyvalent metal ion-eluting filler (B) is blended in such an amount that the amount of the polyvalent metal ions eluted out from the filler becomes 1.0 to 7.0 meq per gram of the polymerizable monomer component (A), the volatile organic solvent (C) is blended in an amount in a range of 30 to 150 parts by mass per 100 parts by mass of the polymerizable monomer component (A) and so as to satisfy 20·X parts by mass or more (X is a number representing the amount of elution of the polyvalent metal ions), and the water (D) is blended in an amount of 3 to 30 parts by mass per 100 parts by mass of the polymerizable monomer component (A).Type: GrantFiled: November 24, 2008Date of Patent: July 30, 2013Assignee: Tokuyama Dental CorporationInventors: Koji Matsushige, Makoto Oguri, Shizuka Shimizu, Takeshi Suzuki
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Patent number: 8487021Abstract: The present disclosure relates to bone cement formulations that have an extended working time for use in vertebroplasty procedures and other osteoplasty procedures together with cement injectors that include energy delivery systems for on-demand control of cement viscosity and flow parameters. The bone cement formulations may include a liquid component having at least one monomer and a non-liquid component including polymer particles and benzoyl peroxide (BPO). The non-liquid component may be further configured to allow controlled exposure of the BPO to the liquid monomer so as to enable control of the viscosity of the bone cement composition.Type: GrantFiled: February 27, 2009Date of Patent: July 16, 2013Assignee: DFINE, Inc.Inventors: Csaba Truckai, Andrew Kohm, John Shadduck, Robert Luzzi
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Publication number: 20130178552Abstract: A powdery filler for dental materials consisting of particles of feldspar or feldspar derivatives having a mean particle diameter (d50) of from 0.25 to 5 ?m, said particles having a coating with a silicon compound containing reactive groups.Type: ApplicationFiled: July 12, 2011Publication date: July 11, 2013Applicant: Quarzwerke GmbHInventors: Dirk Kruber, Thomas Doege
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Patent number: 8476338Abstract: The present invention provides a dental curable composition exhibiting both excellent light diffusion and excellent transparency, and having high mechanical strength and surface smoothness and gloss after polishing as a cured product as well as good handling properties as a paste. The present invention is a dental curable composition including: a polymerizable monomer (A) having a refractive index of 1.52 to 1.58 after polymerization; inorganic particles (B) having a refractive index of 1.43 to 1.50; and inorganic particles (C) having a refractive index of 1.52 to 1.58. The inorganic particles (B) are aggregates of inorganic fine particles having an average primary particle size of 2 to 50 nm, and the content of the inorganic particles (B) is 0.1 to 10% by weight.Type: GrantFiled: December 10, 2010Date of Patent: July 2, 2013Assignee: Kuraray Noritake Dental Inc.Inventors: Masaki Okubayashi, Hirotaka Kita, Yusuke Takahata, Akiko Ota
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Publication number: 20130158157Abstract: A process for the preparation of composite filler particles, comprising: (a) coating a particulate filler having a median particle size (D50) of from 1 to 1200 nm; (b) agglomerating the coated particulate filler, for providing a granulation of the coated particulate filler wherein the granulation contains the coated particulate filler particles whereby the at least one coating layer may be crosslinked by crosslinking groups obtained by reacting the reactive groups and optionally a further crosslinking agent.Type: ApplicationFiled: December 14, 2012Publication date: June 20, 2013Applicant: DENTSPLY INTERNATIONAL INC.Inventors: Simon STELZIG, Jörg Kempter, Stephanie Noerpel, Joachim E. KLEE, Andreas FACHER, Uwe WALZ, Christoph WEBER
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Publication number: 20130158158Abstract: The present invention relates to a kit comprising at least two pastes, A and B. Paste A contains at least one monomer for radical polymerisation; and at least one barbituric acid derivative as polymerisation initiator. Paste B contains at least one monomer for radical polymerisation; and at least one heavy metal compound as polymerisation accelerator that is selected from heavy metal salts and heavy metal complexes. Paste B contains less than 0.01% by weight, relative to the total weight of paste B, of a peroxide; at least one of the pastes A and B contains-at least one filling agent that is poorly soluble or insoluble in the monomer for radical polymerization in either paste A or B respectively; and at least one of the pastes A and B contains at least one inorganic halide salt.Type: ApplicationFiled: December 14, 2012Publication date: June 20, 2013Applicant: HERAEUS MEDICAL GMBHInventor: Heraeus Medical GmbH
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Patent number: 8466211Abstract: A one-part, self-etching dental adhesive having improved performance such as adhesion performance with a simple one-coat application, without the need of separate acid-etching, a priming pre-treatment, or bonding step. The invention provides such improvements due to a function of the pH balance of the system in combination with an acid stable photoinitiating system. More specifically, the performance and pH balance is achieved through the employment of a hydrolytically stable, acidic, high-strength adhesive monomer (such as PENTA), with a stable, bifunctional, hydrophilic monomer (such as AHPMA) that yields greater crosslinking.Type: GrantFiled: November 30, 2009Date of Patent: June 18, 2013Assignee: DENTSPLY International Inc.Inventors: Junjie Sang, Huaibing Liu
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Patent number: 8466212Abstract: The present invention relates to dental materials composed of calix[n]arenes and also to the use thereof for cements, composites, adhesives and coating materials in the dental field. The materials include (a) 0.5 to 90% by weight of at least one polymerizable calix[n]arene according to formula (I), (b) 0.01 to 5% by weight of initiator, (c) 0 to 90% by weight of at least one additional monomer which can polymerize under cationic and/or radical conditions and/or which can polymerize by ring opening, (d) 0 to 85% by weight of filler, (e) 0.01 to 5% by weight of additive and (f) 0 to 70% by weight of solvent.Type: GrantFiled: August 18, 2010Date of Patent: June 18, 2013Assignees: Ivoclar Vivadent AG, Haraeus Kulzer GmbHInventors: Norbert Moszner, Helmut Ritter, Urs-Karl Fischer, Monir Tabatabai, Matthias Schaub, Andreas Utterodt
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Patent number: 8461227Abstract: A composition of macrocyclic oligomer with at least one polymerizable group, (meth)acrylate, for example.Type: GrantFiled: January 4, 2010Date of Patent: June 11, 2013Assignee: DENTSPLY International Inc.Inventors: Xiaoming Jin, Paul D. Hammesfahr
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Publication number: 20130138114Abstract: A calcium-based bone cement formula having a powder component and a setting liquid component with a liquid to powder ratio of 0.20 ml/g to 0.50 ml/g is provided, wherein the powder component includes tetracalcium phosphate. The bone cement formula further contains, based on the total weight of the bone cement formula, 0.01-1% of poly(acrylic acid) having a repeating unit of —(CH2—C(COOH)H)n-, wherein n=50-50000.Type: ApplicationFiled: December 29, 2011Publication date: May 30, 2013Applicant: NATIONAL CHENG KUNG UNIVERSITYInventors: Jiin-Huey Chern Lin, Chien-Ping Ju
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Patent number: 8450388Abstract: The present application provides dental fillers, and methods of making and using dental fillers that include a treated surface that includes a caseinate. Dental compositions including such dental fillers can be useful for delivering ions to the oral environment. Dental compositions, and methods of using dental compositions that include a caseinate and a hardenable resin or a water-dispersible, polymeric film former are also provided.Type: GrantFiled: July 11, 2012Date of Patent: May 28, 2013Assignee: 3M Innovative Properties CompanyInventors: Richard P. Rusin, Sumita B. Mitra, Kevin M. Cummings, Paul A. Burgio, Afshin Falsafi
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Publication number: 20130129666Abstract: The invention provides a polymer based material comprising a water binding agent present in an amount sufficient to chemically and/or physically absorb and/or adsorb water to prevent degradation of the polymer. The invention also provides a polymer based material comprising a plasticizer or organic solvent as well as a multi-component material or composite including materials encompassing a second polymer and/or an active agent. The invention further provides a pharmaceutical composition comprising the aforesaid polymer based material, which can be used for treatment of bone, cartilage and/or periodontal defects.Type: ApplicationFiled: January 11, 2013Publication date: May 23, 2013Applicant: SCIL TECHNOLOGY GMBHInventor: Scil Technology GmbH
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Publication number: 20130125786Abstract: A method is provided for sterilization of a polymerizable monomer, in which the mixture contains at least the polymerizable monomer, a compound (a), and a compound (b). Compound (a) is selected from the group of compounds (a1), compounds (a2), and compounds (a3), wherein compounds (a1) are represented by general formula (I): wherein R1, R2, R3, and R4, independent of each other, represent a substituted alkyl residue, a non-substituted alkyl residue, a halgoen, a nitro group, or a cyano group; compounds (a2) are selected from the group of dimers of compounds (a1); and compounds (a3) are selected from the group of dialkyldicarbonates. Compound (b) is selected from the group of water and alcohols.Type: ApplicationFiled: November 20, 2012Publication date: May 23, 2013Applicant: HERAEUS MEDICAL GMBHInventor: HERAEUS MEDICAL GMBH
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Patent number: 8445558Abstract: A hardenable dental composition that includes a polymerizable component and an organogelator.Type: GrantFiled: September 12, 2007Date of Patent: May 21, 2013Assignee: 3M Innovative Properties CompanyInventors: Naimul Karim, Todd D. Jones, Kevin M. Lewandowski, Bradley D. Craig, Sumita B. Mitra, Jie Yang
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Patent number: 8440737Abstract: The invention relates to a composition for injectable cement, comprising a mineral sold phase, a separate liquid phase and, optionally, microparticles of a biocompatible and biodegradable polymer. The mineral solid phase comprises a mixture of powders with the molar composition: (CP)6 (CaO)y (SrCO3)z, [CP being CaHPO42H2O, CaHPO4, Ca1-xSrxHPO4, an equimolar mixture of bis(Ca(H2PO4)2, H2O and CaO, or a mixture of two or three of said compounds] and y+z=4?1. The liquid phase comprises pure apyrogeneic water or a saline aqueous solution with pH 4 to 9. The ratio L/P [volume of liquid phase/mass of solid mineral phase] is at least 0.4 ml/g. The above is of application as bone replacement.Type: GrantFiled: April 29, 2005Date of Patent: May 14, 2013Assignees: Centre National de la Recherche Scientifique, Universite de Montpellier 1Inventors: Philippe Boudeville, Michel Vert, Sylvie Munier
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Patent number: 8440741Abstract: A one-part, self-etching dental adhesive is disclosed. The adhesive includes a hydrolytically stable acidic adhesive monomer and a hydrolytically stable, difunctional hydrophilic monomer.Type: GrantFiled: July 25, 2011Date of Patent: May 14, 2013Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
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Patent number: 8440740Abstract: A hardening composition comprising a particulate glass, said glass comprising 10-35% by weight of silica, 10-35% by weight of alumina, 3-30% by weight of zinc oxide, 4-30% by weight of P2O5 and 3-25% by weight of fluoride, and an acidic copolymer reactive with the particulate glass under aqueous conditions.Type: GrantFiled: June 14, 2010Date of Patent: May 14, 2013Assignee: DENTSPLY International Inc.Inventors: Gordon Blackwell, Stefan Brugger, Denise Achilles, Jorg Kempter
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Patent number: 8436071Abstract: The invention is directed to an improved dental composition useful in the repair of cavities, apex repairs, root perforations and root canals. Disclosed is a dental composition and dental composition additive which have improved handling characteristics, for example improved viscosity and setting time. The addition of effective amounts of a modified cellulose and calcium chloride to available dental repair compounds, such as mineral trioxide compound, results in the improved dental composition without affecting the other characteristics of the dental repair compound.Type: GrantFiled: October 3, 2011Date of Patent: May 7, 2013Assignee: Saint Louis UniversityInventors: John F. Hatton, Benjamin S. Ber, Gregory P. Stewart
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Patent number: 8436078Abstract: The present invention provides a dental composition exhibiting both an excellent light diffusion property and excellent transparency, and having high mechanical strength and surface smoothness and gloss after polishing as a cured product and good handling properties as a paste. The present invention is a dental composition including: a polymerizable monomer (A); and an amorphous powder (B). The amorphous powder (B) has an average particle size of 1 to 20 ?m, and includes silica-based fine particles and coatings of an oxide that cover the surfaces of the silica-based fine particles. The oxide contains a zirconium atom, a silicon atom, and an oxygen atom. The difference in refractive index between the cured product of the polymerizable monomer (A) and the amorphous powder (B) is 0.005 to 0.03.Type: GrantFiled: April 28, 2009Date of Patent: May 7, 2013Assignees: Kuraray Noritake Dental Inc., JGC Catalysts and Chemicals Ltd.Inventors: Masaki Okubayashi, Koichi Okada, Yusuke Takahata, Keisuke Ohtsuka
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Publication number: 20130109777Abstract: The invention relates to a dental composition comprising a) a compound (A) with the following features: only one backbone unit (U) with 6 to 20 carbon atoms, at least 6 carbon atoms thereof forming an aromatic or an aliphatic cyclic moiety, the remaining carbon atoms either being part of substituents pending from the cyclic moiety or being part of bridging groups to spacer units, wherein one or more of the remaining carbon atoms can be replaced by an oxygen atom, the backbone unit not comprising a bisphenol structure and halogen atoms, one or two unit(s) (S) being connected to the backbone unit (U) via an ether linkage, at least one unit (S) comprising a —CH2-CH2-CH2-CH2-O—CH2-CH(Q)-OG moiety or a —CH2-CH(OG)-CH2-OM moiety or a mixture of these two types of moieties within one unit (S), with G comprising at least one polymerizable moiety and an urethane moiety, the urethane moiety acting as connecting element to unit(s) (S), and M comprising at least one group selected from acroyl, methacroyl, aryl, mixturesType: ApplicationFiled: June 24, 2011Publication date: May 2, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Adrian S. Eckert, Michael M. Cub, Bettina Hailand, Marion B. Kestel, Karsten Dede, Uwe H. Hoheisel, Gioacchino Raia, Christoph Thalacker, Reinhold Hecht, Thomas Luchterhandt, Peter Bissinger, Wolf Steiger
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Patent number: 8431627Abstract: The present invention provides a composition for crown material including resin and a fine spherized composite glass powder. The fine composite glass powder of the present invention for such a configuration has superior qualities with regard to both sintering and optical characteristics, and can be used as a filler for crown material.Type: GrantFiled: August 14, 2009Date of Patent: April 30, 2013Assignee: Sukgyung AT Co., Ltd.Inventors: Hyung Sup Lim, Hyung Joon Lim, Young Cheol Yoo, Sang Heon Kang, Jeong Won Seo
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Patent number: 8426488Abstract: An easily removable dental curable composition which prevents the fall or leakage of a temporary prosthetic appliance or a root canal filling material which is easily removed by bonding and adhering it to tooth, shows such high flowability that its operation is easy, has a long working time and excellent X-ray contrast properties and sealability and can be easily removed as required, and a filling kit. The dental curable composition comprises (A) a polymerizable monomer mixture containing a polymerizable monomer having an acid group in the molecule and (B) a polymerization initiator, wherein the component (A) contains (A?) a long-chain polymerizable monomer having a structure with a chain length of 17 or more atoms and/or the composition further comprises (D1) a soft resin material.Type: GrantFiled: April 24, 2009Date of Patent: April 23, 2013Assignee: Sun Medical Co., Ltd.Inventors: Tatsuya Ori, Akari Yamamoto, Masami Arata, Maho Yoshikawa
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Patent number: 8426490Abstract: The invention relates to a dental composition comprising a monomer or mixture of monomers represented by the following structure (1) with 1,2R independently selected from H, alkyl (e.g. CH3C2H5), and Phenyl, 3,4R independently selected from H, alkyl (e.g. CH3), and halogen (Cl, Br, F), 5R independently selected from H, alkyl (e.g. CH3), m, n=1, 2 and x+y=2 to 10, with the proviso that if m=n=2, than x+y=2 and if m=n=1, than x+y=4 to 10. The invention also relates to a process for producing the monomer or mixture of monomers and the use thereof especially as dental composition.Type: GrantFiled: September 23, 2008Date of Patent: April 23, 2013Assignee: 3M Innovative Properties CompanyInventors: Peter Bissinger, Karsten Dede, Adrian S. Eckert, Marion Kestel, Christoph Thalacker
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Patent number: 8415406Abstract: A bone cement has a liquid acrylic monomer component, a powdered acrylic polymer component and yellowish beta-carotene (Pro-vitamin A) mixed into one of the liquid or powdered component and FDC blue No. 2 Lake powder mixed into the powdered component. The beta-carotene and FDC blue adds a greenish (yellow plus blue) color to the combined liquid and powdered component. The yellowish color disappears on setting of the bone cement leaving the cement blue.Type: GrantFiled: January 16, 2007Date of Patent: April 9, 2013Assignee: Howmedica Osteonics Corp.Inventors: Shulin He, Matthew P. Poggie
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Patent number: 8404758Abstract: The invention provides methods for inducing reversible chain cleavage of polymer chains in a crosslinked polymeric material. Reversible cleavage of the polymer backbone is capable of relieving stress in the polymeric material as the bonds reform in a less stressed state. The invention also provides methods for making polymeric materials capable of reversible chain cleavage, materials made by the methods of the invention, and linear monomers containing reversible chain cleavage groups which are useful in the materials and methods of the invention.Type: GrantFiled: May 17, 2011Date of Patent: March 26, 2013Assignee: The Regents of the University of Colorado, a body corporateInventors: Christopher N. Bowman, Timothy F. Scott
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Patent number: 8394869Abstract: Disclosed are photopolymerizable compositions suitable for uses such as dental composite resins, and that comprise (A) a radical-polymerizable monomer, (B) a photopolymerization initiator that comprises (B1) an ?-diketone compound, (B2) a photoacid generating agent, (B3) an aromatic amine compound, and (C) an organic filler containing a phthalate ester fluorescent agent.Type: GrantFiled: May 20, 2009Date of Patent: March 12, 2013Assignee: Tokuyama Dental CorporationInventors: Hironobu Akizumi, Junichiro Yamagawa
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Publication number: 20130059941Abstract: Presently described are methods of surface treating inorganic oxide particles, hardenable (e.g. dental) compositions comprising a polymerizable resin composition and surface treated particles, as well as surface treated (e.g. nanocluster) inorganic oxide particles, and silane surface treatment compounds. In one embodiment, the method comprises forming a surface treatment compound by reacting a first functional group of a (meth)acrylate monomer having a molecular weight of at least 350 g/mole with a second functional group of a silane compound wherein the first and second functional group react to form a covalent bond; and combining the surface treatment compound with inorganic oxide particles.Type: ApplicationFiled: May 6, 2011Publication date: March 7, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Bradley D. Craig, Ahmed S. Abuelyaman, Sumita B. Mitra
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Patent number: 8389599Abstract: Dental compositions and biphenyl di(meth)acrylate monomers are described. The dental compositions comprise at least one biphenyl di(meth)acrylate monomer comprising two aromatic rings connected with a C—C bond wherein the rings each comprise a substituent comprising a urethane moiety and a (meth)acrylate end group.Type: GrantFiled: October 19, 2009Date of Patent: March 5, 2013Assignee: 3M Innovative Properties CompanyInventors: Jie Yang, Naimul Karim, David B. Olson, Todd D. Jones, Dwight W. Jacobs
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Publication number: 20130049241Abstract: The present invention provide the dental molded product for milling having the excellent aesthetic quality, compatibility for machine and moldability from the moldable composition. The dental molded product for milling in the present invention was obtained by curing the moldable composition which includes a polymerizable monomer, a polymerization initiator, a first spherical inorganic filler and a second spherical inorganic filler. An average particle size of the first spherical inorganic filler is in the range of 0.2 to 10 micro m. A content of the first spherical inorganic filler is in the range of 50 to 85 mass %. An average particle size of the second spherical inorganic filler is in the range of 0.005 to 0.1 micro m. A content of the second spherical inorganic filler is in the range of 1 to 18 mass %.Type: ApplicationFiled: June 22, 2011Publication date: February 28, 2013Applicant: PANASONIC CORPORATIONInventor: Masaya Tsujimoto
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Patent number: 8383734Abstract: The present invention relates to bone cements and, more particularly, to acrylic-based orthopedic bone cements, their use in spinal applications, and methods for making the same. An embodiment of the present invention provides a method of grafting PMMA brushes on cross-linked PMMA nanospheres comprising at least one of the following steps: performing a hydrolysis reaction of surface methyl ester groups of said cross-linked PMMA nanospheres to form surface carboxylic acid groups of said cross-linked PMMA nanospheres; forming a 2-aminoethyl acrylate compound; coupling said surface carboxylic acid groups of said cross-linked PMMA nanospheres with said 2-aminoethyl acrylate compound to form a coupled compound with an initiating site; and grafting said PMMA brushes onto said initiating site.Type: GrantFiled: April 21, 2010Date of Patent: February 26, 2013Assignee: Syracuse UniversityInventors: Julie M. Hasenwinkel, Jeremy L. Gilbert, Danieli C. Rodrigues, Rebecca Bader
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Patent number: 8383697Abstract: A composite material precursor composition includes a matrix precursor, a first plurality of capsules including a liquid polymerizer, an activator, and an accelerant. The liquid polymerizer polymerizes when in contact with the activator, and the accelerant is an accelerant for the polymerization of the liquid polymerizer. The composite material precursor may be used to form a composite material that includes a solid polymer matrix, the first plurality of capsules in the solid polymer matrix, the activator in the solid polymer matrix, and the accelerant in the solid polymer matrix.Type: GrantFiled: April 29, 2010Date of Patent: February 26, 2013Assignee: Board of Trustees of the University of IllinoisInventors: Gerald O. Wilson, Mary M. Caruso, Benjamin J. Blaiszik, James W. Henderson, Christopher Britt, Jeffrey S. Moore, Scott R. White, Nancy R. Sottos
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Patent number: 8372896Abstract: Dental adhesive composition having a pH of at least 5, which comprises an aqueous solution containing (a) a polymerizable N-substituted alkyl acrylic or acrylic acid amide monomer; (b) a water-soluble polymerizable carboxylic acid; and (c) a water-soluble organic solvent.Type: GrantFiled: January 13, 2009Date of Patent: February 12, 2013Assignee: DENTSPLY International Inc.Inventors: Joachim E. Klee, Uwe Lehmann, Franziska Heinzmann
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Patent number: 8367748Abstract: A filler which is surface-modified with a compound of the formula [(PG)-R1—Z]n—SP—[Y—R2-(AG)]m is particularly suitable for use in dental materials, for the preparation of adhesives, coatings and composites.Type: GrantFiled: December 2, 2005Date of Patent: February 5, 2013Assignee: Ivoclar Vivadent AGInventors: Norbert Moszner, Simone Klapdohr, Ulrich Salz, Jorg Zimmermann, Volker M. Rheinberger
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Patent number: 8367745Abstract: To provide a dual curing type composite resin for core build-up having improved curing property by chemical polymerization with improved mechanical strength of a cured body under the condition of no light irradiation and with a shortened setting time, the composite resin is composed of a first component including a (meth)acrylate polymerizable resin and an organic peroxide, and a second component including (meth)acrylate polymerizable resin and a reducing agent, a photopolymerizaton initiator and a filler are included in the first component and/or the second component, and oxide powder of a Group II element in the periodic table having an average particle diameter of 1 ?m or less is blended in the first component and/or the second component.Type: GrantFiled: March 28, 2008Date of Patent: February 5, 2013Assignee: GC CorporationInventors: Yugo Kosaka, Yutaka Shinozaki, Tomohiro Kumagai
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Publication number: 20130030058Abstract: A kit for producing bone cement includes at least one paste A and one paste B. Paste A contains at least one monomer (a1) for radical polymerization; at least one polymer (a2) insoluble in monomer (a1); at least one polymer (a3) soluble in monomer (a1); and at least one radical polymerization initiator (a4). The weight ratio of the at least one polymer (a2) to the at least one polymer (a3) is at least 2 to 1. Paste B contains at least one monomer (b1) for radical polymerization; at least one polymer (b2) and at least one accelerator (b3) soluble in monomer (b1); and optionally a polymer (b4) insoluble in monomer (b1). The maximum quantity of polymer (b4) is 5% by weight, relative to the total weight of paste B. The weight ratio of polymer (b4) to the at least one polymer (b2) is no more than 0.2.Type: ApplicationFiled: July 26, 2012Publication date: January 31, 2013Applicant: HERAEUS MEDICAL GMBHInventors: Sebastian VOGT, Hubert BÜCHNER
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Patent number: 8362105Abstract: A dental curable composition has a curing time of 30 seconds to 120 minutes and includes a compound having an acidic group in the molecule (A), a polymerizable monomer (B), an organic amine compound (C) and a sulfur-containing reducing compound (D). In the dental curable composition, the content of the component (A) is 0.01 to 80 parts by weight, the content of the component (B) is 21 to 99.8 parts by weight, the content of the component (C) is 0.01 to 30 parts by weight and the content of the component (D) is 0 to 30 parts by weight. The composition may be cured at a relatively low temperature close to the body temperature without using a peroxide-based polymerization initiator, and has good sealing properties and adhesion.Type: GrantFiled: August 8, 2006Date of Patent: January 29, 2013Assignee: Sun Medical Co., Ltd.Inventors: Tatsuya Ori, Haruka Nishitani, Yuya Yamamoto, Takashi Yamamoto
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Publication number: 20130023601Abstract: The present invention relates to cements useful in dental applications, and more particularly to dental compositions which may release calcium ions, which may comprise at least one of salicylic acid ester derivative and a calcium source. The present invention further relates to the use of at least one of salicylic acid ester derivative and a calcium source for producing a dental composition, having biological properties and which may release calcium ions for use in dental procedures of intermediate restorations and channel filling.Type: ApplicationFiled: July 25, 2012Publication date: January 24, 2013Inventors: Fabrício Aulo Ogliari, Evandro Piva, Valdemir dos Santos, Roberto Queiróz Martins Alcântara, César Eduardo Bellinati
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Publication number: 20130023600Abstract: The dental composite includes a resin base and a combination of a short-cut fiber filler and a particulate filler. The short-cut fibers may be made of a glass or a polymer, and may have an average length of about 2 mm to about 6 mm. The particulate filler includes a ground structural filler, which consists of particles having an average particle size of between about 0.05 ?m and about 0.5 ?m, and a microfiller, which consists of particles having a mean particle size of about 0.04 ?m or less. The cured dental composite provides high strength, an improved wear resistance, a dramatically improved fracture resistance and a high gloss retention in simulated extended clinical wear.Type: ApplicationFiled: June 20, 2012Publication date: January 24, 2013Applicant: KERR CORPORATIONInventors: Alvin I. Kobashigawa, Vy Phuong Bui, David A. Tobia, Hector G. Garza
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Patent number: 8357732Abstract: A method of synthesizing hydroxyapatite nanorods, having high purity, high crystallinity and high aspect ratio is disclosed here. In one embodiment, high crystalline hydroxyapatite nanorods with relatively stoichiometric structure are prepared via hydrothermal method at 200° C. and under moderate acidic conditions. The synthesized hydroxyapatite nanorods have a diameter of 30-95 nm, a length of 850-1400 nm with an average aspect ratio of 24, degree of crystallinity of 73% and stoichiometry ratio of 1.69. Further it discloses the use of HAp in dental adhesive. The dental adhesive comprising synthesized HAp shows improved diametral tensile strength and high microshear bond strength. Energy dispersive X-ray mapping confirmed the uniform distribution of nanorods in the adhesive matrix. The synthesized hydroxyapatite nanorods have high colloidal stability in the dental adhesive solution.Type: GrantFiled: March 14, 2010Date of Patent: January 22, 2013Inventors: Mehdi Sadat-Shojai, Mohammad Atai, Azizollah Nodehi
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Publication number: 20130012615Abstract: The present invention provides a one-part dental adhesive composition that exhibits excellent adhesive property and bond durability to a tooth structure (particularly dentin) and has high stability to ambient light, in which respective components have been mixed uniformly. The present invention is a one-part dental adhesive composition including a polymerizable monomer (A) having an acidic group, a polymerizable monomer (B) having a fluorocarbon group represented by the general formula (1), water (C), and a polymerization initiator (D). A content of the polymerizable monomer (A) having an acidic group is 5.5 to 35 parts by weight in 100 parts by weight of the total amount of polymerizable monomers. (In the formula, R1 denotes a hydrogen atom or a methyl group, and Rf denotes a fluoroalkyl group having 1 to 20 carbon atoms.Type: ApplicationFiled: March 25, 2011Publication date: January 10, 2013Applicant: Kuraray Noritake Dental, Inc.Inventors: Ai Hinamoto, Naoki Nishigaki, Naofumi Murata
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Publication number: 20120328523Abstract: Polyhydroxyalkanoates (PHAs) from which pyrogen has been removed are provided. PHAs which have been chemically modified to enhance physical and/or chemical properties, for targeting or to modify biodegradability or clearance by the reticuloendothelial system (RES), are described. Methods for depyrogenating PHA polymers prepared by bacterial fermentation processes are also provided, wherein pyrogens are removed from the polymers without adversely impacting the polymers' inherent chemical structures and physical properties. PHAs with advantageous processing characteristics, including low melting points and/or solubility in non-toxic solvents, are also described. The PHAs are suitable for use in in vivo applications such as in tissue coatings, stents, sutures, tubing, bone, other prostheses, bone or tissue cements, tissue regeneration devices, wound dressings, drug delivery, and for diagnostic and prophylactic uses.Type: ApplicationFiled: July 10, 2012Publication date: December 27, 2012Inventors: Simon F. Williams, David P. Martin, Tiliman Gerngross, Daniel M. Horowitz
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Publication number: 20120315601Abstract: The invention is directed to methods for the preparation of a long-lasting dental restoration, a kit for the preparation of a long-lasting dental restoration comprising one or more containers containing: a first polymerizable compound; a second polymerizable compound; a curing agent for a first polymerization process; a curing agent for a second polymerization process; an inorganic filler; and a pigment; and optionally containing instructions for use thereof. The invention is further directed to a long-lasting dental restoration comprising: a polymeric matrix comprising at least two polymeric systems; an inorganic filler; and a pigment, wherein said long lasting dental restoration is formed by at least two curing processes of said polymeric systems, and to methods for the preparation of a dental restoration, wherein said dental restoration is either fully or partially structured chair-side or it is fully structured in a dental laboratory.Type: ApplicationFiled: February 22, 2011Publication date: December 13, 2012Applicant: CORONA DENT Ltd.Inventors: Ehud Shchori, Amir Barad
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Patent number: 8329776Abstract: The invention relates to a dental composition comprising a) a hardenable compound (A1), b) a filler (B1), c) an initiator (C1) being able to initiate curing of compound (A1), compound (A1) having the structure A-(-S1-U-S2-MA)n, with A being a connector element, S1 being a spacergroup comprised of units connected with each other and comprising at least 4 units, S2 being a spacergroup comprised of units connected with each other and comprising at least 4 units, U being an urethane, an amide or an urea group connecting spacergroups S1 and S2, MA being an acrylate or methacrylate group and n being 3 to 6. The invention also relates to a process of producing this dental composition and using the dental composition e.g. as a temporary and/or long term crown and bridge material.Type: GrantFiled: June 27, 2008Date of Patent: December 11, 2012Assignee: 3M Innovative Properties CompanyInventors: Reinhold Hecht, Uwe H. Hoheisel, Christoph Thalacker, William J. Schultz, Wendy L. Thompson
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Patent number: 8329845Abstract: The present invention provides a divided redox-curing type composition including a first part in which at least an oxidizing agent (b) is dissolved in a first radical monomer including a radical monomer (a) having an acidic group and/or a hydrophilic group; and a second part in which at least an aromatic sulfinate (d) is dispersed in a second radical monomer including a radical monomer (c) having neither an acidic group nor a hydrophilic group. According to the present invention, a redox-curing type composition capable of securing a time necessary for an adhesion operation and exhibiting high bond strength not only at the initial stage of adhesion but also over a long period of time thereafter in application to a wetting material such as a tooth or a bone as well as a tooth crown repairing material such as a metal or porcelain.Type: GrantFiled: January 16, 2008Date of Patent: December 11, 2012Assignee: Kuraray Noritake Dental Inc.Inventors: Mitsuru Takei, Hidemi Nakayama, Hiroki Shinoda