Patents Assigned to Dentsply Research & Development Corp
  • Publication number: 20080230167
    Abstract: The present invention is directed toward an adhesive for and a method for bonding artificial plastic teeth to a denture base. The adhesive employs a number of adhesion promoter monomers, dimers or oligomers and a cure package, as well as methyl acetate as a solvent. The method according to the invention includes exposing a plastic tooth to the adhesive and allowing the plastic to soften (not dissolve). The adhesion promoter chains infiltrate the plastic tooth matrix, such that upon curing a secure bond is formed.
    Type: Application
    Filed: December 3, 2007
    Publication date: September 25, 2008
    Applicant: Dentsply Research and Development Corp.
    Inventors: Benjamin Jiemin Sun, Fredric Jay Weber, Camella Maria Ghergulescu, Andrew Mathias Young, Michelle Jennifer Holt
  • Publication number: 20080041520
    Abstract: The present invention is directed toward an adhesive for and a method for bonding artificial plastic teeth to a denture base. The adhesive employs a number of adhesion promoter monomers, dimers or oligomers and a cure package, as well as methyl acetate as a solvent. The method according to the invention includes exposing a plastic tooth to the adhesive and allowing the plastic to soften (not dissolve). The adhesion promoter chains infiltrate the plastic tooth matrix, such that upon curing a secure bond is formed.
    Type: Application
    Filed: August 18, 2006
    Publication date: February 21, 2008
    Applicant: Dentsply Research and development Corp.
    Inventors: Benjamin Jieman Sun, Frederick Jay Weber, Camelia Maria Ghergulescu, Andrew Mathias Young, Michelle Jennifer Holt
  • Publication number: 20070272865
    Abstract: A light control system and method for a film viewer (10). The viewer (10) includes an infrared emitter (50) with an infrared detector (52) in communication with a microprocessor (34). When a radiograph (40) is inserted within the film viewer (10), the radiograph (10) is interposed between the emitter (50) and detector (52). The microprocessor (34) detects a change in the emissions sensed by the detector (52) and illuminates the viewer (10). The invention also provides a film holder (16) that includes a plurality of rollers (60) interposed between the holder (16) and the screen (14).
    Type: Application
    Filed: November 24, 2004
    Publication date: November 29, 2007
    Applicant: DENTSPLY RESEARCH & DEVELOPMENT CORP.
    Inventors: Nicole Sullivan, Curtis Steward, Rick Pecore, James Borowski, James Olejniczak, John Masters
  • Publication number: 20070148623
    Abstract: The invention provides a method of forming dental restorations, particularly dental crowns. The method involves applying a flexible cement composition to a prepared tooth surface. The composition is polymerized so that it substantially hardens. A composite crown-forming material is dispensed into a substantially transparent plastic matrix. The matrix is placed in the mouth of the patient so that the composite material is molded over the tooth surface. Then, the material is irradiated with curing light, through the matrix, so that it hardens to form a dental crown. The crown has good mechanical strength and is resistant to fracturing and breaking.
    Type: Application
    Filed: August 10, 2006
    Publication date: June 28, 2007
    Applicant: Dentsply Research and Development Corp.
    Inventors: Walter Dias, Fuming Sun, Robert Hare
  • Publication number: 20070123605
    Abstract: A self curing activator for chemical polymerization of the interface of a dental bonding agent and a self curing or dual curing dental cement or restorative, includes an aryl borate compound, a polymerizable monomer, an optional acidic compound, an amine compound which exhibits a catalytic action, an organic peroxide containing material, and a metal compound wherein said metal compound promotes the decomposition of the organic peroxide.
    Type: Application
    Filed: August 9, 2006
    Publication date: May 31, 2007
    Applicant: Dentsply Research and Development Corp.
    Inventors: Huaibing Liu, Paul Hammesfahr, Gregory Pomrink
  • Publication number: 20070122592
    Abstract: A sheet (10, 20) for use in a model vacuum thermoforming process, wherein the sheet (10, 20) has a thickened area (11) that may be in a preselected three-dimensional form such as arch-shape (12). The thickened area (11) or three-dimensional area (12) is placed over an area of the model (21) where the plastic sheet is to be stretched during the thermoforming process. This ensures a uniform or a preselected thickness in the stretched areas than would otherwise occur.
    Type: Application
    Filed: August 16, 2006
    Publication date: May 31, 2007
    Applicant: Dentsply Research and Development Corp.
    Inventors: Michael Anderson, John Bozman
  • Publication number: 20070121789
    Abstract: A sensor holder (10) includes a frame member (20) that bounds a void area (21) and which is configured to receive a sensor (11). A retaining means (50, 51) is provided to hold the sensor (11) to the frame (20) such that a connecting cable (12) affixed to the sensor (11) is secured and positioned by the void area (21) for a subsequent imaging procedure.
    Type: Application
    Filed: August 16, 2006
    Publication date: May 31, 2007
    Applicant: Dentsply Research and Development Corp.
    Inventors: John Steck, Kimberly Brown, Nicole Sullivan
  • Publication number: 20070072146
    Abstract: A dispensing syringe for dispensing a multi-component dental composition, preferably a two component composition, is provided. The syringe includes a syringe body with multiple elongated barrels for storing the components of the composition; a threaded plunger rod assembly; and a rotatable, threaded connector knob. Preferably, the syringe body has a double-barrel structure and the plunger rod assembly includes two plunger rods that slide within the barrels. The threaded knob has a through-bore with a continuous internal thread for engaging the outer threads of the first and second plunger rods. A dental practitioner manually rotates the knob to displace the first and second plunger rods and discharge the components. The dispensing syringe may further include a dispensing tip containing a static mixing element for mixing the components and dispensing the mixed composition.
    Type: Application
    Filed: September 29, 2005
    Publication date: March 29, 2007
    Applicant: Dentsply Research and Development Corp.
    Inventor: Paul Pierson
  • Publication number: 20070010597
    Abstract: One-component heat-curable sealant composition for the protection of exposed dental surfaces, comprising (a) a polymerisable monomer and/or oligomer which has at least two polymerizable double bonds per molecule, and (b) an initiator system comprising benzoylperoxide in an amount of at least 2 wt.-% based on the total composition.
    Type: Application
    Filed: March 23, 2006
    Publication date: January 11, 2007
    Applicant: Dentsply Research and Development Corp.
    Inventors: Joachim Klee, Andreas Facher, Christoph Weber, Rolf Mulhaupt, Martin Schmider
  • Publication number: 20070003493
    Abstract: A sustained-release, dental fluoride varnish material includes about 5 percent by weight of NaF; up to about 10 percent by weight of glycerin; up to about 5 percent by weight of fumed silica; and optionally, an amount of varnish additives selected from the group consisting of flavorants, rosins, gums and alcohols.
    Type: Application
    Filed: September 7, 2006
    Publication date: January 4, 2007
    Applicant: Dentsply Research and Development Corp.
    Inventors: Thomas Simonton, Kenneth Peterson, James Sherman
  • Publication number: 20060191336
    Abstract: A method of balancing a set of rotating turbine elements includes measuring imbalance in the rotating elements; adding or removing material to or from at least two correction planes in the turbine set at an angular location measured during the imbalance measurement; and, if necessary, repeating said steps of measuring and removing until a predetermined balance is achieved.
    Type: Application
    Filed: November 14, 2005
    Publication date: August 31, 2006
    Applicant: DENTSPLY Research & Development Corp.
    Inventors: Lu He, Eugene Novak
  • Publication number: 20060160046
    Abstract: A dental apparatus provides a substantially uniform concentration of abrasive material entrained in a pressurized gas to a desired location substantially irrespective the amount of abrasive material in a pressurized container of the apparatus, and resists clogging by the abrasive material. The apparatus includes a control unit having a container that secures the abrasive material, the abrasive material in the container becoming entrained in pressurized gas received from a dental unit. The concentration of the mixture of entrained abrasive material in pressurized gas is maintained by upwardly directing the flow of the mixture in a first conduit against a cap, a portion of the entrained abrasive material returning to the container, with the regulated mixture of entrained abrasive material in pressurized gas being delivered through a hand piece to the desired location.
    Type: Application
    Filed: October 6, 2005
    Publication date: July 20, 2006
    Applicant: Dentsply Research and Development Corp.
    Inventors: Lanny Nesbitt, Matthew Barto, Patrick Riley
  • Publication number: 20060141420
    Abstract: A pontic (10) having a prefabricated notch, channel or slot (11) to physically engage and ensure a secure mechanical lock with the dental appliance (30). The invention also pertains to a method of fabricating a dental appliance (30) and a kit for facilitating the same. The invention has particular application to thermoformed, removable appliances.
    Type: Application
    Filed: September 14, 2005
    Publication date: June 29, 2006
    Applicant: Dentsply Research and Development Corp.
    Inventors: Dann Schwartz, John Sheridan
  • Publication number: 20060111677
    Abstract: A syringe sleeve (10) receives a syringe (11) without the syringe (10) dispensing tip (12). After the syringe (11) is received within the sleeve (10), the dispensing tip (12) is affixed to the syringe (11). This causes the end (50) of the sleeve (10) to open and the end (50) to be physically impinged between the tip (12) and the syringe (11). The syringe (11) is thus protected from the operative environment.
    Type: Application
    Filed: December 28, 2005
    Publication date: May 25, 2006
    Applicant: Dentsply Research and Development Corp.
    Inventor: Lanny Nesbitt
  • Publication number: 20060093983
    Abstract: The present invention provides a plastic tray orthodontic device (11) which may have embedded activators (10) and which is provided with an over-shell (12). The over-shell (12) acts as a force module.
    Type: Application
    Filed: July 26, 2005
    Publication date: May 4, 2006
    Applicant: Dentsply Research and Development Corp.
    Inventor: Charles Schultz
  • Patent number: 7024770
    Abstract: The invention provides high strength dental polymeric dental products made from wax-like polymerizable dental material. These dental products have superior strength compared to products formed from prior wax-like polymerizable materials. Prior wax-like polymerizable materials do not form strong enough polymeric material for making dentures. High strength dentures are made by positioning artificial teeth in wax-like polymerizable dental material of the invention. This material is then shaped and polymerized to the form a denture base of high strength dental polymeric material. These dentures are completed without forming wax and without applying inorganic plaster to the artificial teeth.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: April 11, 2006
    Assignee: Dentsply Research & Development Corp.
    Inventors: Benjamin J. Sun, Andrew M. Lichkus
  • Publication number: 20040209974
    Abstract: A dental composite material includes a hardenable resin matrix and a filler component. The filler component includes (a) a first plurality of preferably glass particles having an average particle size of from about 1 to about 10 micrometers; (b) a second plurality of preferably glass particles having an average particle size of from about 0.1 to about 1 micrometers; and, (c) a plurality of filler particles having an average particle size of from about 0.01 to about 0.04 micrometers. A method according to the invention includes compacting a dental composite material into a prepared tooth cavity, wherein the material has a packability index above about 300 g/mm2.
    Type: Application
    Filed: July 22, 2003
    Publication date: October 21, 2004
    Applicant: DENTSPLY Research & Development Corp.
    Inventors: John C. Subelka, Steven R. Jefferies, Donald A. Kapperman, Paul D. Hammesfahr, Paul A. Silver
  • Patent number: 6799969
    Abstract: The invention provides a high strength dental polymeric material formed from wax-like polymerizable dental material. A wax-like polymerizable dental material formed by a process comprising blending polymerizable compounds which polymerize to form high strength dental polymeric material. The invention provides a process for making a denture including: positioning artificial teeth in wax-like polymerizable dental material, and shaping the polyermizable material into the form of a denture base. The process is completed without forming wax and without applying inorganic plaster to the artificial teeth.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: October 5, 2004
    Assignee: Dentsply Research & Development Corp.
    Inventors: Benjamin J. Sun, Andrew M. Lichkus
  • 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
  • Publication number: 20040167246
    Abstract: A dental composite material includes a hardenable resin matrix and a filler component. The filler component includes (a) a first plurality of preferably glass particles having an average particle size of from about 1 to about 10 micrometers; (b) a second plurality of preferably glass particles having an average particle size of from about 0.1 to about 1 micrometers; and, (c) a plurality of filler particles having an average particle size of from about 0.01 to about 0.04 micrometers. A method according to the invention includes compacting a dental composite material into a prepared tooth cavity, wherein the material has a packability index above about 300 g/mm2.
    Type: Application
    Filed: February 26, 2004
    Publication date: August 26, 2004
    Applicant: DENTSPLY Research & Development Corp.
    Inventors: John C. Subelka, Steven R. Jefferies, Donald A. Kapperman, Paul D. Hammesfahr, Paul A. Silver