Patents Assigned to The American Dental Association Health Foundation
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Patent number: 7018460Abstract: 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: GrantFiled: October 28, 2004Date of Patent: March 28, 2006Assignee: American Dental Association Health FoundationInventors: Huakun Xu, Laurence C. Chow, Shozo Takagi, Frederick C. Eichmiller
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Publication number: 20050281759Abstract: 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: ApplicationFiled: June 17, 2004Publication date: December 22, 2005Applicant: American Dental Association Health FoundationInventor: Ming Tung
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Publication number: 20050081750Abstract: 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: ApplicationFiled: October 28, 2004Publication date: April 21, 2005Applicant: American Dental Association Health FoundationInventors: Huakun Xu, Laurence Chow, Shozo Takagi, Frederick Eichmiller
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Patent number: 6649669Abstract: 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: GrantFiled: December 28, 2001Date of Patent: November 18, 2003Assignee: American Dental Association Health FoundationInventor: Sabine Dickens
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Publication number: 20030167093Abstract: 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: ApplicationFiled: March 1, 2002Publication date: September 4, 2003Applicant: American Dental Association Health FoundationInventors: Huakun Xu, Laurence C. Chow, Shozo Takagi, Frederick C. Eichmiller
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Publication number: 20030149129Abstract: 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: ApplicationFiled: December 28, 2001Publication date: August 7, 2003Applicant: American Dental Association Health FoundationInventor: Sabine Dickens
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Patent number: 6583248Abstract: 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: GrantFiled: October 10, 2000Date of Patent: June 24, 2003Assignee: American Dental Association Health FoundationInventor: Rafael L. Bowen
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Patent number: 6491900Abstract: 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: GrantFiled: January 26, 2001Date of Patent: December 10, 2002Assignee: American Dental Association Health FoundationInventors: Laurence C. Chow, Shozo Takagi, Gerald L. Vogel
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Patent number: 6458869Abstract: 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: GrantFiled: March 30, 2000Date of Patent: October 1, 2002Assignees: National Institute of Standards of Technology, American Dental Association Health FoundationInventors: Joseph M. Antonucci, Frederick C. Eichmiller, Gary E. Schumacher
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Publication number: 20020137812Abstract: 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: ApplicationFiled: January 23, 2002Publication date: September 26, 2002Applicant: American Dental Association Health FoundationInventors: Laurence C. Chow, Shozo Takagi
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Patent number: 6398859Abstract: 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: GrantFiled: December 23, 1999Date of Patent: June 4, 2002Assignee: American Dental Association Health FoundationInventors: Sabine H. Dickens, Shozo Takagi
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Patent number: 6375894Abstract: 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: GrantFiled: May 9, 1995Date of Patent: April 23, 2002Assignees: The United States of America as represented by the Secretary of Commerce, American Dental Association Health FoundationInventors: David S. Lashmore, Moshe P. Dariel, Christian E. Johnson, Menahem B. Ratzker, Anthony A. Guiseppetti, Frederick C. Eichmiller, Glenn L. Beane, David R. Kelley
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Patent number: 6334775Abstract: 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: GrantFiled: February 16, 1999Date of Patent: January 1, 2002Assignee: American Dental Association Health FoundationInventors: Huakun Xu, Frederick C. Eichmiller, Gary E. Schumacher
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Patent number: 6325992Abstract: 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: GrantFiled: February 28, 2000Date of Patent: December 4, 2001Assignee: American Dental Association Health FoundationInventors: Laurence C. Chow, Shozo Takagi
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Patent number: 6210759Abstract: 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: GrantFiled: March 15, 2000Date of Patent: April 3, 2001Assignee: American Dental Association Health FoundationInventor: Sabine H. Dickens
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Patent number: 6206959Abstract: 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: GrantFiled: March 15, 2000Date of Patent: March 27, 2001Assignee: American Dental Association Health FoundationInventor: Sabine H. Dickens
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Patent number: 6187838Abstract: 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: GrantFiled: June 7, 1999Date of Patent: February 13, 2001Assignee: American Dental Association Health FoundationInventor: Sabine H. Dickens
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Patent number: 6180739Abstract: 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: GrantFiled: April 9, 1998Date of Patent: January 30, 2001Assignee: American Dental Association Health FoundationInventor: Rafael L. Bowen
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Patent number: 6114408Abstract: 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: GrantFiled: February 6, 1998Date of Patent: September 5, 2000Assignee: American Dental Association Health FoundationInventor: Sabine Dickens
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Patent number: 6056930Abstract: 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: GrantFiled: June 18, 1999Date of Patent: May 2, 2000Assignee: American Dental Association Health FoundationInventor: Ming S. Tung