Patents Assigned to American Dental Association Health Foundation
  • Patent number: 7018460
    Abstract: A bone replacement material and therapy comprises the combination of calcium phosphate compounds and two or more soluble fillers in the form of fibers, mesh or other materials which have the dual functions of reinforcing an in vivo implant while dissolving at a programmed rate to form macropores capable of receiving natural bone ingrowth.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: March 28, 2006
    Assignee: American Dental Association Health Foundation
    Inventors: Huakun Xu, Laurence C. Chow, Shozo Takagi, Frederick C. Eichmiller
  • Publication number: 20050281759
    Abstract: Calcium peroxyphosphate compounds and dental compositions comprising these compounds that combine both whitening/stain removal of teeth with remineralization are disclosed. The calcium peroxyphosphate compounds are capable of releasing, in an aqueous environment, whitening and remineralization effective amounts of calcium ion, phosphate ion, and active oxygen. Preferred compounds are calcium peroxymonophosphate or calcium diperoxymonophosphate compounds. These compounds may be used in humans and other animals, including other mammals.
    Type: Application
    Filed: June 17, 2004
    Publication date: December 22, 2005
    Applicant: American Dental Association Health Foundation
    Inventor: Ming Tung
  • Publication number: 20050081750
    Abstract: A bone replacement material and therapy comprises the combination of calcium phosphate compounds and two or more soluble fillers in the form of fibers, mesh or other materials which have the dual functions of reinforcing an in vivo implant while dissolving at a programmed rate to form macropores capable of receiving natural bone ingrowth.
    Type: Application
    Filed: October 28, 2004
    Publication date: April 21, 2005
    Applicant: American Dental Association Health Foundation
    Inventors: Huakun Xu, Laurence Chow, Shozo Takagi, Frederick Eichmiller
  • 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
  • Publication number: 20030167093
    Abstract: A bone replacement material and therapy comprises the combination of calcium phosphate compounds and two or more soluble fillers in the form of fibers, mesh or other materials which have the dual functions of reinforcing an in vivo implant while dissolving at a programmed rate to form macropores capable of receiving natural bone ingrowth.
    Type: Application
    Filed: March 1, 2002
    Publication date: September 4, 2003
    Applicant: American Dental Association Health Foundation
    Inventors: Huakun Xu, Laurence C. Chow, Shozo Takagi, Frederick C. Eichmiller
  • Publication number: 20030149129
    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: Application
    Filed: December 28, 2001
    Publication date: August 7, 2003
    Applicant: American Dental Association Health Foundation
    Inventor: Sabine Dickens
  • Patent number: 6583248
    Abstract: The polymerizable cyclodextrin derivatives (“PCDs”) of this invention relate to cyclodextrin derivatives wherein substantially each molecule of which contains one or more covalently attached polymerizable group or groups, may also contain one or more other types of functional groups covalently attached, may also have other types of molecules that are complexed or more particularly within the otherwise empty spaces within the cyclodextrin derivatives, and combinations and permutations of these characteristics.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: June 24, 2003
    Assignee: American Dental Association Health Foundation
    Inventor: Rafael L. Bowen
  • Patent number: 6491900
    Abstract: Candies and confectioneries containing non-toxic sparingly soluble calcium and phosphate compounds as additives, cause the release of calcium and phosphate ions into the oral cavity gradually and persistently for a period no less than five minutes. Released calcium phosphate ions diffuse into partially demineralized tooth enamel or dentin, leasing to remineralization and repair of caries lesions, dental plaque, open dentinal tubules and exposed dentin. Agents and methods for remineralization of teeth, for reducing or eradicating cariogenic challenge in plaque following sucrose intake for producing effective anticaries actions without the use of fluoride and for desensitizing hypersensitive teeth are disclosed.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: December 10, 2002
    Assignee: American Dental Association Health Foundation
    Inventors: Laurence C. Chow, Shozo Takagi, Gerald L. Vogel
  • Patent number: 6458869
    Abstract: The present invention is directed to an etchant/primer composition, an etchant/primer/adhesive monomer composition, kits using the same and methods using the same for improved bonding to dental structures. The etchant/primer composition comprises a compound having the formula: RN(CH2YCO2M)2 wherein R=R1 or R2; R1=an aromatic group; R2=a conjugated unsaturated aliphatic group; Y=a single bond, CH2, CHCH3 or C═CH2; and each M is independently H, an alkali metal, an alkaline earth metal, aluminum, a transition or redox metal or an alkyl group having 1 to 18 carbon atoms, with the proviso that when both M groups are alkyl groups, said compound is capable of being easily hydrolyzed, displaced, or exchanged with other reagents present in the etchant/primer composition, a polar solvent system, and nitric acid.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: October 1, 2002
    Assignees: National Institute of Standards of Technology, American Dental Association Health Foundation
    Inventors: Joseph M. Antonucci, Frederick C. Eichmiller, Gary E. Schumacher
  • Publication number: 20020137812
    Abstract: A bone or dental implant material in the form of a paste includes a mixture of calcium phosphate powders, that are capable of forming hydroxyapatite, with liquid glycerol and hydroxypropyl methylcellulose and Na2HPO4. The paste will harden upon exposure to water with the time to harden controlled by the choice and ratio of constituents.
    Type: Application
    Filed: January 23, 2002
    Publication date: September 26, 2002
    Applicant: American Dental Association Health Foundation
    Inventors: Laurence C. Chow, Shozo Takagi
  • Patent number: 6398859
    Abstract: A pulp-capping and base/lining cement comprising the combination of paste 1 and either paste 2 or a powder, wherein paste 1 contains a carboxylated monomer, dicalcium phophate, and water; and paste 2 or the powder contains a polymerizable base monomer and tetracalcium phosphate. The cement is useful in the repair and/or restoration of dental lesions as well as repair and/or restoration of other calcium and calcium phosphorus containing parts of living organisms.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: June 4, 2002
    Assignee: American Dental Association Health Foundation
    Inventors: Sabine H. Dickens, Shozo Takagi
  • Patent number: 6375894
    Abstract: A metallic composite solid, containing alloys and/or intermetallics, is formed by compacting at moderate pressure a mixture of powder particles, foils or sheets at a temperature close to room temperature, well below the melting temperature of the constituent components and without the addition of low melting metals such as mercury, indium or gallium acting as a sintering agent. This low temperature consolidation of the powder mixture is enhanced by having the surface oxide of the powder particles removed, prior to consolidation, and/or by coating the particles with an oxide-replacing metal such as silver or gold. The coating process may be replacement reactions, autocatalytic reduction or electrolytic reduction. The composite formation is assisted by the addition of a liquid acid such as fluoroboric acid, sulfuric acid, fluoric acid, adipic acid, ascorbic acid, or nitric acid.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: April 23, 2002
    Assignees: The United States of America as represented by the Secretary of Commerce, American Dental Association Health Foundation
    Inventors: David S. Lashmore, Moshe P. Dariel, Christian E. Johnson, Menahem B. Ratzker, Anthony A. Guiseppetti, Frederick C. Eichmiller, Glenn L. Beane, David R. Kelley
  • Patent number: 6334775
    Abstract: Continuous fibers, resin-fiber pastes, or continuous fiber-reinforced preforms are inserted into tooth cavities to form high-strength dental restorations. The fibers may be mixed or coated with a resin monomer and may be used with fillers such as fluoride-releasing fillers and colorants. The resin-fiber mixture may be hardened into preforms suitable for inserting into tooth cavities. Conventional filling materials such as composite resins and glass ionomers may be used to complete the restoration. Other applications include endodontic posts, retention pins, provisional restorations, and indirect restorations. Fiber reinforcement results in strength, toughness and elastic modulus (stiffness) several times greater than those of currently available direct-filling composite resins. The fiber performs are easily handled and placed into tooth cavities; the restorations are aesthetic and wear compatible, and release fluoride.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: January 1, 2002
    Assignee: American Dental Association Health Foundation
    Inventors: Huakun Xu, Frederick C. Eichmiller, Gary E. Schumacher
  • Patent number: 6325992
    Abstract: Calcium phosphate compositions that are particularly useful and unique as orthopedic and dental cements and remineralizers, as well as methods and kits for their use, and the resulting products are disclosed. The compositions comprise tetracalcium phosphate which has been prepared from a mixture with a calcium to phosphorous ratio of less than 2, or prepared and maintained under substantially anhydrous conditions prior to use or, preferably, both. The novel compositions are converted substantially to hydroxyapatite upon setting, are substantially gradually resorbable and replaced by bone when implanted in contact with living bony tissue, and offer distinct advantages in terms of cement strength, setting time and reliability and other properties.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: December 4, 2001
    Assignee: American Dental Association Health Foundation
    Inventors: Laurence C. Chow, Shozo Takagi
  • Patent number: 6210759
    Abstract: Single-solution adhesive resin formulations are made of predominantly dimethacrylates or diacrylates containing predominantly) two carboxyl groups and a functionalized methacrylate or acrylate diluent monomer. A novel light-activated initiator can be used for photopolymerization of such adhesives.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: April 3, 2001
    Assignee: American Dental Association Health Foundation
    Inventor: Sabine H. Dickens
  • Patent number: 6206959
    Abstract: Single-solution adhesive resin formulations are made of predominantly dimethacrylates or diacrylates containing (predominantly) two carboxyl groups and a functionalized methacrylate or acrylate diluent monomer. A novel light-activated initiator can be used for photopolymerization of such adhesives.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: March 27, 2001
    Assignee: American Dental Association Health Foundation
    Inventor: Sabine H. Dickens
  • Patent number: 6187838
    Abstract: The use of polymerizable monomeric conditioning agents for treating the enamel and dentin of a tooth prior to application of a primer and subsequent application of a bonding resin, or a combination of a primer/bonding resin has been found to provide good shear bond strength on both moist and dry dentin. In addition, the contact angles provided by water on dentin conditioned with the polymerizable conditioners as compared to the non-polymerizable phosphoric acid are much lower, reflecting improved spreading over the surface of the tooth.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: February 13, 2001
    Assignee: American Dental Association Health Foundation
    Inventor: Sabine H. Dickens
  • Patent number: 6180739
    Abstract: The polymerizable cyclodextrin derivatives (“PCDs”) of this invention relate to cyclodextrin derivatives wherein substantially each molecule of which contains one or more covalently attached polymerizable group or groups, may also contain one or more other types of functional groups covalently attached, may also have other types of molecules that are complexed or more particularly within the otherwise empty spaces within the cyclodextrin derivatives, and combinations and permutations of these characteristics. The PCDs are referred to herein as “MCDs” when only methacrylate groups comprise the polymerizable groups of the PCDs.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: January 30, 2001
    Assignee: American Dental Association Health Foundation
    Inventor: Rafael L. Bowen
  • Patent number: 6114408
    Abstract: Single-solution adhesive resin formulations are made of predominantly dimethacrylates or diacrylates containing (predominantly) two carboxy groups and a functionalized methacrylate or acrylate diluent monomer. A novel light-activated initiator can be used for photopolymerization of such adhesives.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: September 5, 2000
    Assignee: American Dental Association Health Foundation
    Inventor: Sabine Dickens
  • Patent number: 6056930
    Abstract: This invention involves new compositions and methods of use and delivery of amorphous calcium compounds such as: amorphous calcium phosphate (ACP), amorphous calcium phosphate fluoride (ACPF), amorphous calcium carbonate phosphate (ACCP), amorphous calcium carbonate phosphate fluoride (ACCPF), and amorphous calcium fluoride (ACF) for use in remineralizing and fluoridating teeth. These amorphous compounds or solutions which form the amorphous compounds or calcium phosphate jelly which forms the amorphous compounds, when applied either onto or into dental tissue to prevent and/or repair dental weaknesses such as dental caries, exposed roots and dentin sensitivity. The compounds have the highest solubilities, fastest formation rates and fastest conversion rates (to apatite) among all the calcium phosphates under physiological conditions. Moreover, in the presence to fluoride the amorphous compound convert rapidly to fluoride containing apatite.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: May 2, 2000
    Assignee: American Dental Association Health Foundation
    Inventor: Ming S. Tung