Patents Assigned to Dentsply DeTrey GmbH
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Publication number: 20030130373Abstract: 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: ApplicationFiled: December 3, 2002Publication date: July 10, 2003Applicant: DENTSPLY DeTrey GmbHInventors: Uwe Walz, Joachim E. Klee
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Publication number: 20030125412Abstract: The invention describes a low shrinking polymerizable dental material, comprising a mixture of a polymerizable resin, a polymerizable monomer, a polymerization initiator and/or sensibilizer and a filler in a content of about 20 to about 85 percent. The volumetric shrinkage during polymerization is less than about 1.5 Vol.-% due to its rheopex behavior.Type: ApplicationFiled: December 17, 2002Publication date: July 3, 2003Applicant: DENTSPLY DeTrey GmbHInventors: Joachim E. Klee, Uwe Walz, Dirk Holter, Armin Burgath, Holger Erey, Rolf Mulhaupt
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Patent number: 6575752Abstract: A tooth surface treatment composition includes an acidic component which is at least one water-soluble acid in an aqueous solution, such that when the composition is applied to the tooth surface and not subsequently washed, it will increase the adhesiveness of the tooth structure. A method of treating a tooth structure includes contacting the tooth structure with such a composition.Type: GrantFiled: May 11, 2000Date of Patent: June 10, 2003Assignee: Dentsply DeTrey GmbHInventors: Kai Pflug, Gordon Brian Blackwell, Steven R. Jefferies, Hans Rolf Kase
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Publication number: 20030105184Abstract: 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: ApplicationFiled: December 3, 2002Publication date: June 5, 2003Applicant: DENTSPLY DeTrey GmbHInventors: Uwe Walz, Joachim E. Klee
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Publication number: 20030055167Abstract: The invention concerns macromonomers of a molecular weight of at least M≧500 g/mol containing siloxane groups. The macromonomers are usable as polymerizable monomers in a dental/medical composite comprising further at least a polymerizable monomer, an organic or inorganic acid or an acidic monomer, a stabilizer, an initiator, pigments and an organic or inorganic filler. The dental/medical composite is usable as a dental restorative material for filling and restoring teeth, making inlays and onlays, for artificial teeth, for sealing and surface modification materials, usable as temporary crown and bridge material. Furthermore, the macromonomers are usable for filler surface modification, as precursors for siloxane condensation products or as precursor for preparation of nanoparticles containing active polymerizable moieties.Type: ApplicationFiled: August 6, 2002Publication date: March 20, 2003Applicant: DENTSPLY DeTrey GmbHInventors: Joachim E. Klee, Uwe Walz, Jurgen Fiedler, Rolf Mulhaupt, Holger Frey, Ekkehardt Muh
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Publication number: 20020103272Abstract: A self-curing dental adhesive has at least one polymerizable resin; at least one polymerizable monomer; at least one polymerizable monomer with an acidic moiety selected from the group 1Type: ApplicationFiled: April 2, 2002Publication date: August 1, 2002Applicant: DENTSPLY DeTrey GmbHInventors: Joachim E. Klee, Uwe Walz, Kewang Lu
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Publication number: 20020082318Abstract: 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: ApplicationFiled: January 11, 2002Publication date: June 27, 2002Applicant: DENTSPLY DeTrey GmbHInventors: Joachim E. Klee, Uwe Walz
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Publication number: 20020068771Abstract: The invention describes a low shrinking polymerizable dental material, comprising a mixture of a polymerizable resin, a polymerizable monomer, a polymerization initiator and/or sensibilizer and a filler in a content of about 20 to about 85 percent. The volumetric shrinkage during polymerization is less than about 1.5 Vol.-% due to its rheopex behavior.Type: ApplicationFiled: December 11, 2001Publication date: June 6, 2002Applicant: DENTSPLY DeTrey GmbH.Inventors: Joachim E. Klee, Uwe Walz, Dirk Holter, Armin Burgath, Holger Erey, Rolf Mulhaupt
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Patent number: 6399037Abstract: 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: GrantFiled: February 4, 1999Date of Patent: June 4, 2002Assignee: Dentsply Detrey GmbHInventors: Kai Pflug, Christoph Weber
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Publication number: 20020065337Abstract: 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: ApplicationFiled: November 19, 2001Publication date: May 30, 2002Applicant: DENTSPLY DeTrey GmbH.Inventor: Kai Pflug
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Patent number: 6372816Abstract: The invention provides a storage stable dental composition comprising a volatile organic solvent and a polymerizable material enclosed by a package, which includes a closure, such as a cover or plug and a container made of a copolymer of a cycloolefin and an open chain olefin. In accordance with an embodiment of the invention is provided a stored packaged dental product by the process including: enclosing a dental composition in a package with at least a substantial portion of an injection molded thermoplastic copolymer of a cycloolefin and an open chain olefin, and storing the dental composition in the package for at least 1 week.Type: GrantFiled: February 4, 2000Date of Patent: April 16, 2002Assignee: DENTSPLY DeTrey GmbHInventors: Uwe Walz, Kai P. Pflug, Ralf Wilner, Markus Evers
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Publication number: 20020012634Abstract: Polymerizable denial materials having an antimicrobial effect are provided. These include dental materials such as protective dental varnishes, composites, compomers, fissure sealants, dental cements, dental bonding agents and similar materials, and containing 2,4,4′-trichloro-2′-hydroxydiphenyl ether.Type: ApplicationFiled: January 25, 2001Publication date: January 31, 2002Applicant: DENTSPLY DeTrey GmbHInventors: Kai Pflug, Michael J. Noack
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Patent number: 6339114Abstract: Liquid crystalline (meth)acrylates of the invention include at least three rigid rod-like moieties. One of these moieties is comprised between the (meth)acrylate rests and further two moieties are bonded as side chains. The liquid crystalline (meth)acrylates polymerizable using redox initiators and/or photo initiators. The (meth)acrylates of the invention polymerize quantitative and with very low volume shrinkage of less than 2.5 percent.Type: GrantFiled: September 8, 1999Date of Patent: January 15, 2002Assignee: Dentsply DeTrey GmbHInventors: Joachim E. Klee, Holger Frey, Dirk Holter, Rolf Mulhaupt
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Patent number: 6306927Abstract: 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: GrantFiled: March 31, 2000Date of Patent: October 23, 2001Assignee: Dentsply DeTrey GmbHInventors: Grodon B. Blackwell, Karen Utz
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Patent number: 6126732Abstract: A shaped, high-strength dental ceramic prothesis is made by pressing a molding composition comprising about 1-50 wt % glass particles and about 50-99 wt % ceramic particles to form a ceramic frame, veneering the frame and firing the coated frame.Type: GrantFiled: May 12, 1999Date of Patent: October 3, 2000Assignee: Dentsply DeTrey GmbHInventors: Carmen Hofmann, Ludwig J. Gauckler, Gerhard Bayer, Martin E. Hofmann, Atef Malash, Peter Scharer, Heinz Luthy, Klaus Krumbholz, Wigbert Hauner, Hansjorg Janssen, Ralf Janda
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Patent number: 6004390Abstract: A tooth surface treatment composition includes an acidic component which is at least one water-soluble acid in an aqueous solution, such that when the composition is applied to the tooth surface and not subsequently washed, it will increase the adhesiveness of the tooth structure. A method of treating a tooth structure includes contacting the tooth structure with such a composition.Type: GrantFiled: April 14, 1997Date of Patent: December 21, 1999Assignee: DENTSPLY DeTrey GmbHInventors: Kai Pflug, Gordon Brian Blackwell, Steven R. Jefferies, Hans Rolf Kase
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Patent number: 5996864Abstract: The invention provides a tooth polishing paste holder having a cup member, a connector member and a base member. The cup has an inner wall. The inner wall has a circumference less than 10 cm. The connector connects the cup to the base. The base is adapted to support the cup in an upright position on a horizontal surface.Type: GrantFiled: April 2, 1997Date of Patent: December 7, 1999Assignee: Dentsply DeTrey GmbHInventor: Werner Birglechner
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Patent number: 5916498Abstract: A process for manufacturing a non-metallic dental prosthesis including a ceramic frame and an esthetic ceramic veneer including the steps of: preparing the ceramic frame by press molding a composition comprising from 1 to 50 parts by weight glass particles and from 50 to 99 parts by weight ceramic particles at a molding temperature from 800 to 1300.degree. C.; applying a slurry comprising a dental ceramic veneering composition to the thus prepared ceramic frame; and firing the ceramic frame having the slurry applied thereto at a temperature lower than the molding temperature to produce said dental prosthesis. The dental ceramic veneering composition may have a melting point at least 50.degree. C. less than the molding temperature.Type: GrantFiled: June 15, 1998Date of Patent: June 29, 1999Assignee: DENTSPLY DeTrey GmbHInventors: Carmen Hofmann, Ludwig J. Gauckler, Gerhard Bayer, Martin E. Hofmann, Atef Malash, Peter Scharer, Heinz Luthy, Klaus Krumbholz, Wigbert Hauner, Hansjorg Janssen, Ralf Janda