Patents Assigned to Dentsply DeTrey GmbH
  • Patent number: 9999576
    Abstract: An aqueous dental glass ionomer composition comprising (a) a reactive particulate glass, (b) a linear or branched polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the linear or branched polymer comprising acidic groups has a polymer backbone and optionally pendant groups, (c) optionally dispersed nanoparticles comprising grafted linear or branched polymer chains comprising acidic groups, and having a polymer backbone characterized in that a polymer backbone of the linear or branched polymer of component (b) and/or, if present, the grafted linear or branched polymer chains of component (c) are obtainable a process comprising (i) cyclopolymerizing or cyclocopolymerizing one or more compounds of the following formula (I):
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: June 19, 2018
    Assignee: Dentsply Detrey GMBH
    Inventors: Joachim E. Klee, Oliver Elsner, Sven Pohle, Helmut Ritter, Dominika Bernert
  • Patent number: 9770395
    Abstract: Non-aqueous dental adhesive comprising a mixture containing (i) one or more polymerizable monomers optionally containing an acidic group, (ii) a polymerization initiator, and (iii) a thermal polymerization inhibitor of the following formula (I) wherein R?1 represents a hydrogen atom, or a saturated hydrocarbon group having 1 to 18 carbon atoms. R?2, which may be the same or different if more than one R?2 is present, independently represent a saturated hydrocarbon group having 1 to 18 carbon atoms, and c represents an integer of from 1 to 4, and (iv) optionally an organic solvent.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: September 26, 2017
    Assignee: Dentsply Detrey GmbH
    Inventors: Joachim E. Klee, Uwe Lehmann
  • Patent number: 9248005
    Abstract: Dental obturator point having an obturation body containing a composite material comprising (a) a polymer and b) a particulate filler, whereby the obturation body has a radio opacity of at least 3 mm/mm Al, characterized in that the composite material has (i) a tensile strength of from 5 to 70 MPA1 (ii) a flexural strength of from 5 to 90 MPA, (iii) a flexural module of from 0.1 to 2.5 GPa, and which has (iv) a 300 rpm drilling coefficient at 37° C. in the range of from ?1 to 7.00.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: February 2, 2016
    Assignee: Dentsply DeTrey GmbH
    Inventors: Joachim E. Klee, Christoph Weber, Frank Pfefferkorn, Tim Hornung, Anja Glaner
  • Publication number: 20150231040
    Abstract: Dental composition comprising (i) a particulate filler; (ii) a polymerizable hydrolysis-stable compound of the following formula (1) AXn wherein A is a linker group containing at least n nitrogen atoms and optionally one or more acidic groups, X are moieties containing a polymerizable double bond and forming an amide bond with a nitrogen atom of A, which X may be the same or different and are represented by the following formula (2) wherein R1 and R2 are independent from each other and represent a hydrogen atom, a C1-6 alkyl group or a group —(CH2)m—Z, wherein Z is COOM, OPO3M2, PO3M2, SO3M, and M is independently a hydrogen atom or a metal atom, and m is an integer of from 0 to 6, L is a bond, a C1-6 alkylene group; and n is an integer of at least 1; provided that at least one X cannot be a (meth)acryl group; and (iii) an initiator system.
    Type: Application
    Filed: May 5, 2015
    Publication date: August 20, 2015
    Applicant: DENTSPLY DETREY GMBH
    Inventors: Simon STELZIG, Joachim E. KLEE, Andreas FACHER, Christoph WEBER
  • Publication number: 20140039088
    Abstract: Dental composition comprising (i) a particulate filler; (ii) a polymerizable hydrolysis-stable compound of the following formula (1) AXn wherein A is a linker group containing at least n nitrogen atoms and optionally one or more acidic groups, X are moieties containing a polymerizable double bond and forming an amide bond with a nitrogen atom of A, which X may be the same or different and are represented by the following formula (2) wherein R1 and R2 are independent from each other and represent a hydrogen atom, a C1-6 alkyl group or a group —(CH2)m—Z, wherein Z is COOM, OPO3M2, PO3M2, SO3M, and M is independently a hydrogen atom or a metal atom, and m is an integer of from 0 to 6, L is a bond, a C1-6 alkylene group; and n is an integer of at least 1; provided that at least one X cannot be a (meth)acryl group; and (iii) an initiator system.
    Type: Application
    Filed: October 18, 2011
    Publication date: February 6, 2014
    Applicant: DENTSPLY DETREY GMBH
    Inventors: Simon Stelzig, Joachim E. Klee, Andreas Facher, Christoph Weber
  • Publication number: 20140039087
    Abstract: Dental composition comprising a water-soluble polymerizable compound of the following formula (1): wherein A is a linear or branched linker group represented by the following formula (3), wherein the nitrogen atom of at least two of the termini forms an amide bond with an X moiety; wherein R? represents a hydrogen atom or a substituted or unsubstituted aliphatic or cycloaliphatic hydrocarbon group, wherein each R may be the same or different L1, L2, and L3 which may be the same or different, independently represent a single bond, or a C2-20 straight-chain, branched or cyclic hydrocarbon group optionally containing from 1 to 6 heteroatoms selected from nitrogen and oxygen in the backbone of the hydrocarbon group, and optionally from 1 to 6 functional groups selected from carboxylic acid groups or a salt thereof, hydroxyl groups, thiol groups and amino groups, and in case a plurality of L1 and L2 are present, each of L1 and L2 may be the same or different; Q1 and Q2, which may be the same or different, independ
    Type: Application
    Filed: October 18, 2011
    Publication date: February 6, 2014
    Applicant: DENTSPLY DETREY GMBH
    Inventors: Simon Stelzig, Joachim E. Klee, Andreas Facher, Christoph Weber
  • Publication number: 20120214900
    Abstract: An aqueous dental glass ionomer composition comprising (a) a reactive particulate glass, (b) a linear or branched polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the linear or branched polymer comprising acidic groups has a polymer backbone and optionally pendant groups, (c) optionally dispersed nanoparticles comprising grafted linear or branched polymer chains comprising acidic groups, and having a polymer backbone characterized in that a polymer backbone of the linear or branched polymer of component (b) and/or, if present, the grafted Sinear or branched polymer chains of component (c) are obtainable a process comprising (i) cyclopolymerizing or cyclocopolymerizing one or more compounds of the following formula (I).
    Type: Application
    Filed: November 2, 2010
    Publication date: August 23, 2012
    Applicant: DENTSPLY DETREY GMBH
    Inventors: Joachim E. Klee, Oliver Elsner, Sven Pohle, Helmut Ritter, Dominika Bernert
  • Publication number: 20120149801
    Abstract: An aqueous dental glass ionomer composition comprising (a) a reactive particulate glass, and (b) a linear or branched polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the linear or branched polymer comprising acidic groups has a polymer backbone and optionally pendant side chains, (c) optionally dispersed nanoparticles, and (d) optionally a low molecular compound, characterized in that the glass ionomer composition comprises —SxH groups, wherein x is an integer of from 1 to 6, which crosslink the particulate glass and/or the linear polycarboxylic acid and/or the optional dispersed nanoparticles and/or the optional low molecular compound.
    Type: Application
    Filed: March 9, 2010
    Publication date: June 14, 2012
    Applicant: DENTSPLY DETREY GMBH
    Inventors: Joachim E. Klee, Stefan Brugger, Helmut Ritter, Christoph Weber, Oliver Elsner, Mareike Bardts, Andreas Facher, Sven Pohle
  • Publication number: 20080234404
    Abstract: A dental root canal sealing composition curable in the absence of a polymerisation initiator, which comprises (i) an amino terminated prepolymer having a viscosity at 23° C. of less than 100 Pas. (ii) a compound capable of undergoing polyaddition with the aminoterminated prepolymer (i); (iii) 40 to 85 wt.-% of a filler for providing a minimum radioopacity of at least 3 mm/mm Al.
    Type: Application
    Filed: December 17, 2004
    Publication date: September 25, 2008
    Applicant: DENTSPLY DETREY GMBH
    Inventor: Joachim E. Klee
  • Publication number: 20080004365
    Abstract: One component dental adhesive composition having a pH of at most 3, comprising (a) a polymerisable acrylate monomer or prepolymer, (b) a photoinitiator, and (c) a solvent comprising t-butanol.
    Type: Application
    Filed: May 13, 2005
    Publication date: January 3, 2008
    Applicant: DENTSPLY DETREY GMBH
    Inventor: Gordon Blackwell
  • Patent number: 7041709
    Abstract: A composition including nanoparticles each having an acidic polymerizable siloxane moiety. For example, a hydrolysis stable, self-etching, self-priming dental adhesive composition including 90 to 10 percent by weight of an aqueous phase, and 10 to 90 percent by weight of acidic polymerizable nanoparticles. The acidic polymerizable nanoparticles are obtainable by hydrolysis of a mixture containing one or more hydrolyzable organosilicon compounds wherein (i) at least a portion of the hydrolyzable organosilicon compounds contains one or more polymerizable groups and (ii) at least a portion of the hydrolyzable organosilicon compounds contain one or more acidic moieties.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: May 9, 2006
    Assignee: Dentsply DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Lehmann, Uwe Walz
  • Patent number: 7001932
    Abstract: A composite material is provided which, while having an unusually high filler content may be extruded from a dental syringe and remains easily adaptable in the dental cavity. When materials of the present invention are cured, dental restorations are provided which have unusually high surface hardness and yield strength, as well as a low volume shrinkage on curing. This is achieved by use of a mixture of filler particles with a specific size, size range, and size relationship. Such a combination of properties makes the material of the present invention particularly useful for restoring cavities in posterior teeth.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: February 21, 2006
    Assignee: Dentsply DeTrey GmbH
    Inventors: Gordon B. Blackwell, Karin Utz
  • 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: 6767936
    Abstract: The invention concerns a dental composition comprising bisacrylamides that are polymerizable by free-radical polymerization and by Michael-addition polymerization with amines. The application of polymerization and addition polymerization with amines opens the possibility to completely reacted materials that have no oxygen inhibited layers. The claimed bisacrylamides have an improved hydrolytic stability.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: July 27, 2004
    Assignee: Dentsply DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Patent number: 6734223
    Abstract: Dental compositions comprising at least a polymerizable monomer and/or at least a polyaminoester that are prepared by reaction of bis- or polyacrylic esters and amines, pigments, organic and/or inorganic fillers, initiators and stabilizers.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: May 11, 2004
    Assignee: Dentsply DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Patent number: 6693143
    Abstract: A low-viscosity dental material contains a non-settling nanoscale filler. Improvements of the mechanical properties of the dental materials, including the abrasive resistance and the compressive strength are provided. Furthermore, the dental materials have increased resistance to microleakage and have increased bond strengths. The filler forms a stable sol with low-viscosity dental materials and the filler may be prepared by surface treatment of fillers having a primary particle size of from about 1 to about 100 nanometers.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: February 17, 2004
    Assignee: Dentsply DeTrey GmbH
    Inventor: Kai Pflug
  • Publication number: 20040029995
    Abstract: A composition from 0° C. to 40° C. and from 0 percent to 100 percent humidity, comprising from 0.2 to 5 percent by weight of at least a peroxide which decomposes by at most fifty percent by weight of the peroxide within 10 hours at a temperature of at least 75° C., from 0.2 to 3 percent by weight of a metal containing material, from 0.1 to 3 percent by weight of a protected reducing agent. The protected reducing agent is adapted to form an active reducing agent, from 0 to 1 percent by weight of an amine. The composition is formed from peroxide stored at from 0° C. to 40° C. and from 0 percent to 100 percent humidity for at least 24 hours.
    Type: Application
    Filed: August 5, 2003
    Publication date: February 12, 2004
    Applicant: Dentsply DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz
  • Patent number: 6660785
    Abstract: The synthesis of self-adhesive polymerizabe monomers and their application as a water containing and a water free self-adhesive dental/medical composite is described. The dental/medical composite comprises a self-adhesive polymerizabe monomer, a polymerizable monomer, an acid-reactive and/or reactive and/or non-reactive filler, a diluent, a polymerization initiator and a stabilizer. As polymerization initiators are used the commonly known thermal initiators, redox initiators and/or photo initiators. The new adhesive dental composite develops adhesion to dentine of about 4 MPa. Fillers of high X-ray absorbance provide radio-opacity values grater than that of the same thickness of aluminium.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: December 9, 2003
    Assignee: Dentsply DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz
  • Publication number: 20030225182
    Abstract: Dental composition having an improved light and thermal stability, including a mixture of at least a polymerizable resin, at least a polymerizable monomer, at least a polymerization initiator and/or a sensitizer and stabilizer, and at least an organic and/or inorganic filler and pigments in a content of 0 to 90 percent and at least one of the stable radicals.
    Type: Application
    Filed: June 2, 2003
    Publication date: December 4, 2003
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Publication number: 20030130373
    Abstract: The invention concerns a dental composition comprising bisacrylamides that are polymerizable by free-radical polymerization and by Michael-addition polymerization with amines. The application of polymerization and addition polymerization with amines opens the possibility to completely reacted materials that have no oxygen inhibited layers. The claimed bisacrylamides have an improved hydrolytic stability.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 10, 2003
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee