Patents Assigned to Pentron Ceramics, Inc.
  • Patent number: 8002885
    Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: August 23, 2011
    Assignee: Pentron Ceramics, Inc.
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Publication number: 20100323328
    Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Application
    Filed: August 31, 2010
    Publication date: December 23, 2010
    Applicant: PENTRON CERAMICS INC.
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Patent number: 7806694
    Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: October 5, 2010
    Assignee: Pentron Ceramics, Inc.
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Publication number: 20100038807
    Abstract: Solid free form fabrication techniques can be utilized indirectly to manufacture substrates, dies, models, near-net shapes, shells, and wax-ups that are then used in the manufacture of dental articles. Digital light processing is the most preferred indirect method for the production of substrates. After the substrates are produced, various coating or deposition techniques such as gel casting, slip casting, slurry casting, pressure infiltration, dipping, colloidal spray deposition or electrophoretic deposition are used to manufacture the dental article.
    Type: Application
    Filed: October 28, 2009
    Publication date: February 18, 2010
    Applicant: PENTRON CERAMICS, INC.
    Inventors: Dmitri Brodkin, Carlino Panzera, Arun Prasad, Grant P. Day, Stefan Borenstein
  • Publication number: 20100035215
    Abstract: A porcelain blank comprising a porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing temperature from about 750° C. to about 1050° C. and a coefficient of thermal expansion from about 9×10?6/° C. to about 17.5×10?6/° C., and comprises: SiO2 57-67? Al2O3 7-15 K2O 7-15 Na2O 6-15 Li2O 0.5-3.
    Type: Application
    Filed: September 2, 2009
    Publication date: February 11, 2010
    Applicant: PENTRON CERAMICS, INC.
    Inventors: Dmitri G. Brodkin, Carlino Panzera, Lisa M. Kaiser
  • Patent number: 7655586
    Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: February 2, 2010
    Assignee: Pentron Ceramics, Inc.
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Publication number: 20090321971
    Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Application
    Filed: June 24, 2009
    Publication date: December 31, 2009
    Applicant: PENTRON CERAMICS, INC.
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Patent number: 7497983
    Abstract: Methods of forming a colored ceramic body or dental article are described that include: (a) forming a body from a ceramic-containing powder; (b) shaping the body into a desired shape; and (c) firing the shaped body in an atmosphere comprising at least one coloring agent. Methods of forming a fully dense ceramic body that lacks discoloration, are also described which include: (a) forming a body from a ceramic-containing powder; (b) shaping the body into a desired shape; (c) placing the shaped body in a firing atmosphere containing at least one impurity that promote discoloration of the ceramic body; (d) placing the ceramic body in proximity to an atmosphere powder; and (e) firing the shaped body in proximity to an atmosphere powder; wherein the atmosphere powder acts as at least one of a barrier and a getter for the at least one impurity.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: March 3, 2009
    Assignee: Pentron Ceramics, Inc.
    Inventors: Ajmal Khan, Dmitri G. Brodkin
  • Publication number: 20080085828
    Abstract: Methods of forming a colored ceramic body or dental article are described that include: (a) forming a body from a ceramic-containing powder; (b) shaping the body into a desired shape; and (c) firing the shaped body in an atmosphere comprising at least one coloring agent. Methods of forming a fully dense ceramic body that lacks discoloration, are also described which include: (a) forming a body from a ceramic-containing powder; (b) shaping the body into a desired shape; (c) placing the shaped body in a firing atmosphere containing at least one impurity that promote discoloration of the ceramic body; (d) placing the ceramic body in proximity to an atmosphere powder; and (e) firing the shaped body in proximity to an atmosphere powder; wherein the atmosphere powder acts as at least one of a barrier and a getter for the at least one impurity.
    Type: Application
    Filed: August 17, 2007
    Publication date: April 10, 2008
    Applicant: Pentron Ceramics, Inc.
    Inventors: Ajmal Khan, Dmitri Brodkin
  • Patent number: 7279238
    Abstract: A pressable dental ceramic comprising a mixture of glass and glass-ceramic frits. A refractory filler is also combined with the frits. The dental ceramic contains an amount of leucite less than about 35 percent by weight. Other additives may be included such as pigments, opacifying agents and fluorescing agents. The dental ceramic comprises a cellular-like microstructure comprised of glassy regions surrounded by clusters of leucite crystals distributed around those glassy regions forming a cellular three-dimensional network.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: October 9, 2007
    Assignee: Pentron Ceramics, Inc.
    Inventor: Dmitri Brodkin
  • Publication number: 20070056467
    Abstract: Blocks of material are prepared in a variety of shapes and sizes to be used in the fabrication of models for dental restorations. The material comprises a partially sintered ceramic material. The blocks are used to manufacture molds using CAD/CAM methods and equipment. The molds are useful in the manufacture of dental restorations using ceramics, metals, alloys, or powders thereof, and composite materials. The models milled from the blanks may be used to manufacture a variety of dental restorations including, but not limited to, crowns, bridges, space maintainers, tooth replacement appliances, orthodontic retainers, dentures, posts, jackets, inlays, onlays, facings, veneers, facets, implants, abutments, splints, partial crowns, teeth, cylinders, pins, and connectors.
    Type: Application
    Filed: November 13, 2006
    Publication date: March 15, 2007
    Applicant: PENTRON CERAMICS, INC.
    Inventor: Carlino Panzera
  • Patent number: 7011522
    Abstract: Ceramic precursor powders are combined with a binder and pressed into blocks or similar shapes to form green bodies. The ceramic powders consist of fairly uniform particles thoroughly dispersed to be essentially free of agglomerates such that it will sinter predictably and isotropically without appreciable distortion. The green bodies may be soft-sintered to a bisque density less than about eighty five percent of the final density. The soft-sintered blocks are then milled to a desired shape and sintered to a final density rendering a high strength dental restorative material. The material may be aluminum oxide, partially stabilized zirconium oxide, mixtures of the two, mullite or any suitable oxide that may be sintered to high strength (i.e., greater than 250 MPa).
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: March 14, 2006
    Assignee: Pentron Ceramics, Inc.
    Inventors: Carlino Panzera, Dmitri Brodkin, Paul Panzera