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).
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Patent number: 9427382Abstract: 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: GrantFiled: October 8, 2010Date of Patent: August 30, 2016Assignee: DENTSPLY International Inc.Inventors: Junjie Sang, Paul D. Hammesfahr
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Patent number: 8466211Abstract: 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: GrantFiled: November 30, 2009Date of Patent: June 18, 2013Assignee: DENTSPLY International Inc.Inventors: Junjie Sang, Huaibing Liu
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Patent number: 8440741Abstract: 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: GrantFiled: July 25, 2011Date of Patent: May 14, 2013Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
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Publication number: 20120172488Abstract: 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: ApplicationFiled: November 30, 2009Publication date: July 5, 2012Inventors: Huaibing Liu, Junjie Sang
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Publication number: 20120101183Abstract: 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: ApplicationFiled: July 25, 2011Publication date: April 26, 2012Inventors: Junjie SANG, Huaibing LIU, Xiuling WANG
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Patent number: 8022114Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.Type: GrantFiled: December 10, 2009Date of Patent: September 20, 2011Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
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Publication number: 20110165539Abstract: 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: ApplicationFiled: October 8, 2010Publication date: July 7, 2011Inventors: JUNJIE SANG, Paul D. Hammesfahr
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Publication number: 20110112208Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.Type: ApplicationFiled: December 10, 2009Publication date: May 12, 2011Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
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Publication number: 20090043009Abstract: 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: ApplicationFiled: September 25, 2008Publication date: February 12, 2009Inventor: Junjie Sang
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Publication number: 20090030101Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.Type: ApplicationFiled: September 25, 2008Publication date: January 29, 2009Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
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Publication number: 20090011387Abstract: 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: ApplicationFiled: September 8, 2008Publication date: January 8, 2009Inventors: Junjie Sang, Paul D. Hammesfahr
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Publication number: 20070299157Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.Type: ApplicationFiled: September 4, 2007Publication date: December 27, 2007Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
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Publication number: 20070293598Abstract: 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: ApplicationFiled: January 31, 2007Publication date: December 20, 2007Inventors: Junjie Sang, Paul Hammesfahr
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Publication number: 20070244215Abstract: 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: ApplicationFiled: October 10, 2006Publication date: October 18, 2007Inventor: Junjie Sang
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Publication number: 20050059753Abstract: 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: ApplicationFiled: September 20, 2004Publication date: March 17, 2005Inventors: Junjie Sang, Paul Hammesfahr
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Publication number: 20040229973Abstract: Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-coat application without need for tooth etching.Type: ApplicationFiled: May 13, 2004Publication date: November 18, 2004Inventors: Junjie Sang, Huaibing Liu, Xiuling Wang
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Publication number: 20020198285Abstract: 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: ApplicationFiled: April 5, 2002Publication date: December 26, 2002Applicant: DENTSPLY Research & Development Corp.Inventors: Junjie Sang, Paul D. Hammesfahr
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Patent number: 6391940Abstract: 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: GrantFiled: June 29, 1999Date of Patent: May 21, 2002Assignee: Dentsply Research & Development Corp.Inventors: Gordon Brian Blackwell, Kewang Lu, Chin-Teh Huang, Mingxin Fan, Paul D. Hammesfahr, Xiuling Wang, Junjie Sang
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Patent number: 6315554Abstract: 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: GrantFiled: November 14, 2000Date of Patent: November 13, 2001Assignee: Dentsply Research & Development Corp.Inventors: Andrew J. Coste, Junjie Sang, Xiuling Wang, Lisa Durst