Patents by Inventor Junjie Sang

Junjie Sang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9427382
    Abstract: A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: August 30, 2016
    Assignee: DENTSPLY International Inc.
    Inventors: Junjie Sang, Paul D. Hammesfahr
  • Patent number: 8466211
    Abstract: A one-part, self-etching dental adhesive having improved performance such as adhesion performance with a simple one-coat application, without the need of separate acid-etching, a priming pre-treatment, or bonding step. The invention provides such improvements due to a function of the pH balance of the system in combination with an acid stable photoinitiating system. More specifically, the performance and pH balance is achieved through the employment of a hydrolytically stable, acidic, high-strength adhesive monomer (such as PENTA), with a stable, bifunctional, hydrophilic monomer (such as AHPMA) that yields greater crosslinking.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: June 18, 2013
    Assignee: DENTSPLY International Inc.
    Inventors: Junjie Sang, Huaibing Liu
  • Patent number: 8440741
    Abstract: A one-part, self-etching dental adhesive is disclosed. The adhesive includes a hydrolytically stable acidic adhesive monomer and a hydrolytically stable, difunctional hydrophilic monomer.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: May 14, 2013
    Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
  • Publication number: 20120172488
    Abstract: A one-part, self-etching dental adhesive having improved performance such as adhesion performance with a simple one-coat application, without the need of separate acid-etching, a priming pre-treatment, or bonding step. The invention provides such improvements due to a function of the pH balance of the system in combination with an acid stable photoinitiating system. More specifically, the performance and pH balance is achieved through the employment of a hydrolytically stable, acidic, high-strength adhesive monomer (such as PENTA), with a stable, bifunctional, hydrophilic monomer (such as AHPMA) that yields greater crosslinking.
    Type: Application
    Filed: November 30, 2009
    Publication date: July 5, 2012
    Inventors: Huaibing Liu, Junjie Sang
  • Publication number: 20120101183
    Abstract: A one-part, self-etching dental adhesive is disclosed. The adhesive includes a hydrolytically stable acidic adhesive monomer and a hydrolytically stable, difunctional hydrophilic monomer.
    Type: Application
    Filed: July 25, 2011
    Publication date: April 26, 2012
    Inventors: Junjie SANG, Huaibing LIU, Xiuling WANG
  • Patent number: 8022114
    Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: September 20, 2011
    Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
  • Publication number: 20110165539
    Abstract: A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.
    Type: Application
    Filed: October 8, 2010
    Publication date: July 7, 2011
    Inventors: JUNJIE SANG, Paul D. Hammesfahr
  • Publication number: 20110112208
    Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.
    Type: Application
    Filed: December 10, 2009
    Publication date: May 12, 2011
    Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
  • Publication number: 20090043009
    Abstract: A one-part, self-etching dental adhesive having improved performance such as adhesion performance with a simple one-coat application, without the need of separate acid-etching, a priming pre-treatment, or bonding step. The invention provides such improvements due to a function of the pH balance of the system in combination with an acid stable photoinitiating system. More specifically, the performance and pH balance is achieved through the employment of a hydrolytically stable, acidic, high-strength adhesive monomer (such as PENTA), with a stable, bifunctional, hydrophilic monomer (such as AHPMA) that yields greater crosslinking.
    Type: Application
    Filed: September 25, 2008
    Publication date: February 12, 2009
    Inventor: Junjie Sang
  • Publication number: 20090030101
    Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.
    Type: Application
    Filed: September 25, 2008
    Publication date: January 29, 2009
    Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
  • Publication number: 20090011387
    Abstract: A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.
    Type: Application
    Filed: September 8, 2008
    Publication date: January 8, 2009
    Inventors: Junjie Sang, Paul D. Hammesfahr
  • Publication number: 20070299157
    Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.
    Type: Application
    Filed: September 4, 2007
    Publication date: December 27, 2007
    Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
  • Publication number: 20070293598
    Abstract: A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.
    Type: Application
    Filed: January 31, 2007
    Publication date: December 20, 2007
    Inventors: Junjie Sang, Paul Hammesfahr
  • Publication number: 20070244215
    Abstract: A one-part, self-etching dental adhesive having improved performance such as adhesion performance with a simple one-coat application, without the need of separate acid-etching, a priming pre-treatment, or bonding step. The invention provides such improvements due to a function of the pH balance of the system in combination with an acid stable photoinitiating system. More specifically, the performance and pH balance is achieved through the employment of a hydrolytically stable, acidic, high-strength adhesive monomer (such as PENTA), with a stable, bifunctional, hydrophilic monomer (such as AHPMA) that yields greater crosslinking.
    Type: Application
    Filed: October 10, 2006
    Publication date: October 18, 2007
    Inventor: Junjie Sang
  • Publication number: 20050059753
    Abstract: A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.
    Type: Application
    Filed: September 20, 2004
    Publication date: March 17, 2005
    Inventors: Junjie Sang, Paul Hammesfahr
  • Publication number: 20040229973
    Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.
    Type: Application
    Filed: May 13, 2004
    Publication date: November 18, 2004
    Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
  • Publication number: 20020198285
    Abstract: A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.
    Type: Application
    Filed: April 5, 2002
    Publication date: December 26, 2002
    Applicant: DENTSPLY Research & Development Corp.
    Inventors: Junjie Sang, Paul D. Hammesfahr
  • Patent number: 6391940
    Abstract: A preferred embodiment of the invention provides a composition and method of treating dental metal. The composition includes a polymerizable aryl compound having at least one carboxylic acid group and at least one polymerizable group, and a polymerizable compound having at least one polymerizable group and at least one phosphorous containing group. A preferred composition includes at least 50 percent by weight of a volatile organic solvent, at least 15 percent by weight of one or more polymerizable acrylate compounds and an effective amount of a photoinitiator. At least a portion of the polymerizable compounds are multifunctional polymerizable compounds having at least three acrylate moieties. The polymerizable compounds are substantially soluble in the solvent. The composition is adapted to form a polymeric material which is adapted to adhere to metal and ceramics and to dentin. Compositions of the invention have superior adhesion to dental metals and tooth without separately acid etching dentin or enamel.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: May 21, 2002
    Assignee: Dentsply Research & Development Corp.
    Inventors: Gordon Brian Blackwell, Kewang Lu, Chin-Teh Huang, Mingxin Fan, Paul D. Hammesfahr, Xiuling Wang, Junjie Sang
  • Patent number: 6315554
    Abstract: A shade guide (10) has a base (11) and a plurality of indicia tabs (15) carried by stems (14). Base (11) also includes a shade calculation table (20) containing at least the necessary recipe components of a foundation, body and enamel layers (22, 23 and 24) to achieve the shade of a given tab (15).
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: November 13, 2001
    Assignee: Dentsply Research & Development Corp.
    Inventors: Andrew J. Coste, Junjie Sang, Xiuling Wang, Lisa Durst