Patents Assigned to Pentron Clinical Technologies, LLC
  • Patent number: 9642685
    Abstract: A method and system for the fabrication of dental articles includes at least two imaging and measuring devices, which measure and provide images of the internal and external structure of intra-oral objects in a patient's oral cavity. The outputs from these devices are linked so that the descriptions of the intra-oral objects and features, oral cavity and surrounding bone structure are stored in a system of reference positions. The system of reference positions functions as a “global positioning device” registering locations and orientations of the measuring and imaging device or probe relative to the intra-oral objects and bone structure and orientations of the resulting individual frames or scans in the global system of coordinates. Three-dimensional images, scans and/or maps of the oral cavity obtained from each device are pieced together to generate solid three-dimensional models of the intra-oral objects.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: May 9, 2017
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Dmitri Brodkin
  • Patent number: 9517117
    Abstract: A fiber-reinforced composite post having an inner core section or rod fabricated of fibers impregnated in a resin matrix and an outer sheath of fibers arranged in the form of a mesh. The outer sheath comprises an interior and an exterior surface, the exterior surface is dry and unembedded fibers, and the outer sheath is attached to the inner core. In an embodiment of the dental post, the interior surface of the mesh is embedded in the resin matrix of the inner core with the inner core fibers.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: December 13, 2016
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Ajit Karmaker
  • Patent number: 9492360
    Abstract: An obturator in which a filling material includes a biodegradable thermoplastic polymer. A bioactive substance may also be included in the filling material. The thermoplastic polymer acts as a matrix for the bioactive substance. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: November 15, 2016
    Assignee: PENTRON CLINICAL TECHNOLOGIES, LLC
    Inventors: Weitao Jia, Bruce Alpert
  • Patent number: 9345647
    Abstract: Polymerizable compositions are provided that contain an epoxy compound and a polymerizable, ethylenically-unsaturated resin having an acid functional group where the epoxy compound is polymerized by cationic polymerization initiated by the acid functional group and the polymerizable, ethylenically-unsaturated resin is polymerized by free-radical polymerization. To that end, a two-part polymerizable composition is provided that has a first part containing the epoxy compound; and a second part containing the polymerizable, ethylenically-unsaturated resin having an acid functional group. The first part and/or the second part further contain a radical initiator effective to initiate either self-curing or light-curing by free-radical polymerization.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: May 24, 2016
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Shuhua Jin, Weitao Jia
  • Patent number: 9296891
    Abstract: A filler for a dental resin composition is disclosed, comprising silica particles derived from a nanoparticulate silica sol, the filler material having at least one crystalline phase. The filler material provides improved wear resistance and other properties.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: March 29, 2016
    Assignee: PENTRON CLINICAL TECHNOLOGIES, LLC
    Inventors: Jia Weitao, Jin Shuhua
  • Patent number: 8664294
    Abstract: A self etching, dental cement composition is provided having the advantage of not requiring a separate etching and bonding step. The cement composition comprises a polymerizable (meth)acrylate trimellitic acid/anhydride, a phosphoric acid (meth)acrylate, a hydroxyalkyl(meth)acrylate, copolymerizable multi-functional (meth)acrylate monomers, a diluent, fillers, and a curing system. These cement compositions are prepared as a two-paste system that is combined prior to use.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: March 4, 2014
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Weitao Jia, Shuhua Jin
  • Patent number: 8298664
    Abstract: A dental material comprising a symmetrically rod-shaped fiber-reinforced composite comprising at least two layers of preimpregnated fibers, wherein the preimpregnated fibers comprise fibers coated with a resin, wherein the layers are unbraided, and wherein each layer is unidirectionally disposed on the preceding layer in a direction that is different from the direction of the preceding layer. The rod-shaped composite may be hollow and contain a channel throughout the axial length of the rod or may contain a shaft or other material that is inserted into the channel.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: October 30, 2012
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Weitao Jia
  • Patent number: 8235718
    Abstract: The shade system contains a set of dentin/body shades, and a set of enamel and opaque shades that correspond to the dentin/body shades. The system may also include tints and specialty incisals to provide special effects, if necessary.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: August 7, 2012
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Weitao Jia, Shuhua Jin
  • Patent number: 8163815
    Abstract: Disclosed herein are curable (meth)acrylate resins for dental compositions obtained by reacting an anhydride with an alcohol or an amine to obtain a carboxy ester or a carboxy amide and reacting the carboxy ester or carboxy amide with a (meth)acrylate monomer comprising an epoxide group or an oxetane group.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: April 24, 2012
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Shuhua Jin, Weitao Jia
  • Patent number: 8113836
    Abstract: A dental filling material comprising a polybutylene polymer having a molecular weight of about 10,000 to about 100,000 and being viscoelastic at about 20° C. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: February 14, 2012
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Weitao Jia
  • Publication number: 20110300511
    Abstract: A fiber-reinforced composite post having an inner core section or rod fabricated of fibers impregnated in a resin matrix and an outer sheath of fibers arranged in the form of a mesh. The outer sheath comprises an interior and an exterior surface, the exterior surface is dry and unembedded fibers, and the outer sheath is attached to the inner core. In an embodiment of the dental post, the interior surface of the mesh is embedded in the resin matrix of the inner core with the inner core fibers.
    Type: Application
    Filed: August 15, 2011
    Publication date: December 8, 2011
    Applicant: PENTRON CLINICAL TECHNOLOGIES, LLC
    Inventor: Ajit Karmaker
  • Patent number: 8053490
    Abstract: A dental filler and dental resin restorative composition containing the dental filler is provided. The dental filler is prepared by pre-treating an acid-reactive filler with a polymerizable monomer or oligomer pre-treatment chemical having at least one acid or acid-precursor functional group, at least one polymerizable unsaturated carbon-carbon bond, and a molecular weight of about 1,000 grams per mole or less.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: November 8, 2011
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Weitao Jia, Shuhua Jin
  • Patent number: 7997901
    Abstract: A fiber-reinforced composite post having an inner core section or rod fabricated of fibers impregnated in a resin matrix and an out sheath of fibers arranged in the form of a mesh. The sheath comprises an interior and an exterior surface, whereby the interior surface is attached to and embedded in the resin matrix of the rod and the exterior surface has dry, unimpregnated fibers.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: August 16, 2011
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Ajit Karmaker
  • Patent number: 7998375
    Abstract: Fiber-reinforced composite posts are produced having high strength and high radiopacity. In a method of manufacturing the fiber-reinforced composite posts, fibers are pulled through filled resin and heat is applied at various steps in the process to provide high strength and optimal radiopacity.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: August 16, 2011
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Ajit Karmaker, Mike Karlak, Weitao Jia
  • Publication number: 20110129802
    Abstract: A dental filling material comprising a polybutylene polymer having a molecular weight of about 10,000 to about 100,000 and being viscoelastic at about 20° C. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 2, 2011
    Applicant: PENTRON CLINICAL TECHNOLOGIES LLC
    Inventor: Weitao Jia
  • Patent number: 7906564
    Abstract: A self-etching, dental cement composition is provided having the advantage of not requiring a separate etching and bonding step.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: March 15, 2011
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Weitao Jia, Shuhua Jin
  • Publication number: 20100323330
    Abstract: A polymerizable tooth colorant composition, comprising: a polymerizable resin composition; an additive composition comprising a colorant, a whitener, or both; and a curing system. The composition allows easy coloring and/or whitening of teeth.
    Type: Application
    Filed: August 26, 2010
    Publication date: December 23, 2010
    Applicant: PENTRON CLINICAL TECHNOLOGIES LLC
    Inventor: Weitao Jia
  • Patent number: 7855242
    Abstract: A curable restorative composition is disclosed, comprising a polymerizable mono(meth)acrylate resin having a vapor pressure of 1 mm Hg or less at 20° C., a plasticizer; and a curing system for the mono(meth)acrylate resin. The composition is particularly useful for making temporary restorations. Methods of used and kits comprising the composition are also disclosed.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: December 21, 2010
    Assignee: Pentron Clinical Technologies LLC
    Inventors: Weitao Jia, Shuhua Jin
  • Patent number: 7837471
    Abstract: A dental filling material comprising an inner core and outer layer of material disposed and surrounding the inner core, both the inner core and outer layer of material each containing a thermoplastic polymer. The thermoplastic polymer may be biodegradable. A bioactive substance may also be included in the filling material. The thermoplastic polymer acts as a matrix for the bioactive substance. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: November 23, 2010
    Assignee: Pentron Clinical Technologies, LLC
    Inventor: Weitao Jia
  • Patent number: 7750063
    Abstract: A dental filling material comprising an inner core and outer layer of material disposed and surrounding the inner core, both the inner core and outer layer of material each containing a thermoplastic polymer. The thermoplastic polymer may be biodegradable. A bioactive substance may also be included in the filling material. The thermoplastic polymer acts as a matrix for the bioactive substance. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: July 6, 2010
    Assignee: Pentron Clinical Technologies, LLC
    Inventors: Weitao Jia, Ajit Karmaker