Patents Assigned to ADA Foundation
  • Patent number: 7846411
    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: Grant
    Filed: June 17, 2004
    Date of Patent: December 7, 2010
    Assignee: ADA Foundation
    Inventor: Ming Tung
  • Publication number: 20100212545
    Abstract: A bone or dental implant material in the form of a paste includes a mixture of calcium phosphate and/or calcium-containing powders, liquid glycerol, organic acid and gelling agent. The paste is stable, resistant to washout and will harden upon exposure to water. Physical characteristics of the paste, including consistency, porosity, and hardening time, are controlled by the choice and ratio of constituents.
    Type: Application
    Filed: May 3, 2010
    Publication date: August 26, 2010
    Applicant: ADA Foundation
    Inventors: Laurence C. Chow, Shozo Takagi
  • Patent number: 7713542
    Abstract: Living cellular material is encapsulated or placed in a protective material (cell protector) which is biocompatible, biodegradable and has a three-dimensional form. The three dimensional form is incorporated into a matrix that maybe implanted in vivo, ultimately degrade and thereby by replaced by living cell generated material.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: May 11, 2010
    Assignee: ADA Foundation
    Inventors: Huakun Xu, Michael D. Weir
  • Patent number: 7709029
    Abstract: A bone or dental implant material in the form of a paste includes a mixture of calcium phosphate and/or calcium-containing powders, liquid glycerol, organic acid and gelling agent. The paste is stable, resistant to washout and will harden upon exposure to water. Physical characteristics of the paste, including consistency, porosity, and hardening time, are controlled by the choice and ratio of constituents.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: May 4, 2010
    Assignee: ADA Foundation
    Inventors: Laurence C. Chow, Shozo Takagi
  • Patent number: 7619016
    Abstract: Remineralizing dental cements contain source(s) of calcium and phosphate ions, adhesive resin monomers, reinforcing base resin monomers, and catalysts able to initiate the polymerization of the adhesive and reinforcing base resin monomers. Such dental cements can be used as orthodontic cements, crown and bridge cements, adhesives, sealants, cavity liners, and protective coatings. The release of calcium and phosphate ions and, optionally, fluoride ions, protects tooth structure from demineralization, a precursor of tooth decay.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: November 17, 2009
    Assignee: ADA Foundation
    Inventors: Sabine H. Dickens, Frederick C. Eichmiller
  • Publication number: 20090188622
    Abstract: Disclosed are compositions that comprise vinylarylalkylene ethers of cyclodextrins optionally containing ether-linked adhesion-promoting groups, in combination with copolymerizable monomer or monomers. The copolymerizable monomer or monomers may include vinylarylalkylene ethers of oligohydroxy compounds (for example, sorbitol divinylbenzyl ether and others). The composition further may include stabilizers (for example, 1,3,5-trimethyl-2,4,6-tris(3,5-di-(tert)-butyl-4-hydroxybenzyl)benzene and others), and polymerization initiators (for example, phenylbis[2,4,6-trimethylbenzoyl]phosphine oxide and others) and reinforcing materials (for example, imogolite). Methods of preparing the compositions as well as the components of compositions and methods for their use in dental and other applications are also disclosed.
    Type: Application
    Filed: January 27, 2009
    Publication date: July 30, 2009
    Applicant: ADA Foundation
    Inventor: Rafael L. Bowen
  • Publication number: 20090093566
    Abstract: Combining nanosized particles of a source of desired dental restorative, repair or therapeutic materials with strengthening agents in various generally nanosized form such as whiskers, fibers, particles and the like in a resin matrix provides a highly strain resistant composite which more effectively releases the therapeutic agents. The utilization of nano sized particles of the therapeutic agent in the combination enables observation of significantly improved therapeutic results.
    Type: Application
    Filed: October 17, 2008
    Publication date: April 9, 2009
    Applicant: ADA Foundation
    Inventors: Huakun Xu, Limin Sun, Shozo Takagi, Laurence C. Chow
  • Publication number: 20080292565
    Abstract: Compositions and methods for forming, in an aqueous environment, a nanoaggregate of calcium fluoride and amorphous calcium phosphate-containing compound, such as amorphous calcium phosphate fluoride or amorphous calcium carbonate phosphate fluoride are described. The nanoaggregate (or nanocomposite) can release calcium, phosphate, and fluoride, and ultimately convert to the tooth mineral, fluorapatite. One method for forming such a nanoaggregate involves applying a non-aqueous (e.g., varnish-based) composition (e.g., a suspension), containing solid particles of water soluble salts of calcium, phosphate, and fluoride, to the aqueous environment of the mouth. This results in rapid solubilization of the salts, precipitation of the nanoaggregate, and tooth remineralization. Tooth fluoridation and remineralization may also be carried out by applying to the tooth a non-aqueous carrier containing the nanoaggregate. Whitening agents can also be added to these compositions and methods.
    Type: Application
    Filed: May 23, 2008
    Publication date: November 27, 2008
    Applicant: ADA Foundation
    Inventor: Ming S. Tung
  • Patent number: 7294187
    Abstract: A bone or dental implant material in the form of a paste includes a mixture of calcium phosphate and/or calcium-containing powders and a solution that is (1) an acidic calcium phosphate solution saturated with respect to one or more calcium phosphate compounds, (2) a concentrated acid solution, or (3) salt solutions with a cationic component other than calcium. The paste is stable, resistant to washout and will form hydroxyapatite and harden relatively rapidly to a cement.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: November 13, 2007
    Assignee: ADA Foundation
    Inventors: Laurence C. Chow, Shozo Takagi
  • Publication number: 20070123604
    Abstract: The present invention relates to methods and compositions of dental materials containing nano-sized calcium phosphate and other fillers that release calcium, phosphate and fluoride. This invention further relates to dental compositions for restorations, stress-bearing applications, artificial crowns, anterior and posterior tooth fillings, adhesives, cavity liners, cements, bases, orthodontic devices, prostheses, and sealants utilizing high stress-bearing materials that release materials for the remineralization of decayed tooth structures.
    Type: Application
    Filed: May 26, 2005
    Publication date: May 31, 2007
    Applicant: ADA Foundation
    Inventors: Huakun Xu, Limin Sun, Shozo Takagi, Laurence Chow
  • Publication number: 20070098652
    Abstract: Disclosed are dental compositions and methods. In accordance with one embodiment, a dental composition includes calcium, fluorine, which is generally present in the form of fluoride, and phosphate or another stabilizing anion. The composition is stable as against precipitation of calcium fluoride during transport and storage, but is unstable against the precipitation of calcium fluoride in the oral cavity of a human. In many embodiments, the amount of fluoride may be less than the amount of fluoride used in a comparable composition intended for a similar purpose. A dental method comprises applying the composition to the oral cavity of a patient, whereupon calcium fluoride precipitates from the composition.
    Type: Application
    Filed: October 24, 2006
    Publication date: May 3, 2007
    Applicant: ADA Foundation
    Inventors: Laurence Chow, Shozo Takagi
  • Publication number: 20070092580
    Abstract: Disclosed are dual-phase cement precursor systems and related methods and kits. The cement precursor systems are composed of a first and second discrete phases, at least one of which is aqueous. When combined, the cement precursor phases form a cement that is suitable as a bone graft material for bone repair procedures. In preferred embodiments, the materials are highly biocompatible, osteoinductive, and bioresorbable. A number of different but not mutually exclusive cement chemistries may be employed in the cement precursor systems. For instance, hydrogel-forming polymer cements, carboxyl/calcium cements, or calcium phosphate cements may be employed.
    Type: Application
    Filed: October 18, 2006
    Publication date: April 26, 2007
    Applicant: ADA Foundation
    Inventors: Laurence Chow, Shozo Takagi
  • Publication number: 20070092856
    Abstract: Disclosed are endodontic filling materials and methods. A method for filling a dental root canal may include providing a hydrosetting filling material and inserting the hydrosetting filling material into the dental root canal, the material setting in the root canal to form a biocompatible filling. The hydrosetting filling material comprises a hydrogel former and a filler. The hydrogel former is at least one of a reactive organic hydrogel formers, an inorganic hydrogel formers, and a non-reactive organic hydrogel formers, and the filler is at least one of a self-hardening and a non-hardening filler. Plural filling material precursor compositions that collectively contain hydrogel formers and fillers may be provided.
    Type: Application
    Filed: October 18, 2006
    Publication date: April 26, 2007
    Applicant: ADA Foundation
    Inventors: Laurence Chow, Shozo Takagi
  • Publication number: 20060270752
    Abstract: Combining nanosized particles of a source of desired dental restorative, repair or therapeutic materials with strengthening agents in various generally nanosized form such as whiskers, fibers, particles and the like in a resin matrix provides a highly strain resistant composite which more effectively releases the therapeutic agents. The utilization of nano sized particles of the therapeutic agent in the combination enables observation of significantly improved therapeutic results.
    Type: Application
    Filed: May 24, 2006
    Publication date: November 30, 2006
    Applicant: ADA Foundation
    Inventors: Huakun Xu, Limin Sun, Shozo Takagi, Laurence Chow
  • Publication number: 20060263443
    Abstract: A bone or dental implant material in the form of a paste includes a mixture of calcium phosphate and/or calcium-containing powders, liquid glycerol, organic acid and gelling agent. The paste is stable, resistant to washout and will harden upon exposure to water. Physical characteristics of the paste, including consistency, porosity, and hardening time, are controlled by the choice and ratio of constituents.
    Type: Application
    Filed: March 11, 2004
    Publication date: November 23, 2006
    Applicant: ADA Foundation
    Inventors: Laurence Chow, Shozo Takagi
  • Publication number: 20060159717
    Abstract: Living cellular material is encapsulated or placed in a protective material (cell protector) which is biocompatible, biodegradable and has a three-dimensional form. The three dimensional form is incorporated into a matrix that maybe implanted in vivo, ultimately degrade and thereby by replaced by living cell generated material.
    Type: Application
    Filed: May 18, 2005
    Publication date: July 20, 2006
    Applicant: ADA Foundation
    Inventors: Huakun Xu, Michael Weir
  • Publication number: 20050074415
    Abstract: A bone or dental implant material in the form of a paste includes a mixture of calcium phosphate and/or calcium-containing powders and a solution that is (1) an acidic calcium phosphate solution saturated with respect to one or more calcium phosphate compounds, (2) a concentrated acid solution, or (3) salt solutions with a cationic component other than calcium. The paste is stable, resistant to washout and will form hydroxyapatite and harden relatively rapidly to a cement.
    Type: Application
    Filed: September 15, 2004
    Publication date: April 7, 2005
    Applicant: ADA Foundation
    Inventors: Laurence Chow, Shozo Takagi
  • Publication number: 20050020720
    Abstract: Remineralizing dental cements contain source(s) of calcium and phosphate ions, adhesive resin monomers, reinforcing base resin monomers, and catalysts able to initiate the polymerization of the adhesive and reinforcing base resin monomers. Such dental cements can be used as orthodontic cements, crown and bridge cements, adhesives, sealants, cavity liners, and protective coatings. The release of calcium and phosphate ions and, optionally, fluoride ions, protects tooth structure from demineralization, a precursor of tooth decay.
    Type: Application
    Filed: July 2, 2004
    Publication date: January 27, 2005
    Applicant: ADA Foundation
    Inventors: Sabine Dickens, Frederick Eichmiller
  • Patent number: 6793725
    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: Grant
    Filed: January 23, 2002
    Date of Patent: September 21, 2004
    Assignee: ADA Foundation
    Inventors: Laurence C. Chow, Shozo Takagi