Patents by Inventor Paul Panzera
Paul Panzera 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: 9155597Abstract: Solid free form fabrication techniques such as fused deposition modeling and three-dimensional printing are used to create a dental restoration. Three-dimensional printing includes ink-jet printing a binder into selected areas of sequentially deposited layers of powder. Each layer is created by spreading a thin layer of powder over the surface of a powder bed. Instructions for each layer may be derived directly from a CAD representation of the restoration. The area to be printed is obtained by computing the area of intersection between the desired plane and the CAD representation of the object. All the layers required for an aesthetically sound restoration can be deposited concurrently slice after slice and sintered/cured simultaneously. The amount of green body oversize is equivalent to the amount of shrinkage which occurs during sintering or curing.Type: GrantFiled: July 31, 2008Date of Patent: October 13, 2015Assignee: Ivoclar Vivadent AGInventors: Dmitri G. Brodkin, Carlino Panzera, Paul Panzera
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Patent number: 7011522Abstract: 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: GrantFiled: December 18, 2001Date of Patent: March 14, 2006Assignee: Pentron Ceramics, Inc.Inventors: Carlino Panzera, Dmitri Brodkin, Paul Panzera
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Patent number: 6994549Abstract: Solid free form fabrication techniques such as fused deposition modeling and three-dimensional printing are used to create a dental restoration. Three-dimensional printing comprises inkjet printing a binder into selected areas of sequentially deposited layers of powder. Each layer is created by spreading a thin layer of powder over the surface of a powder bed. Instructions for each layer may be derived directly from a CAD representation of the restoration. The area to be printed is obtained by computing the area of intersection between the desired plane and the CAD representation of the object. All the layers required for an aesthetically sound restoration can be deposited concurrently slice after slice and sintered/cured simultaneously. The amount of green body oversize is equivalent to the amount of shrinkage which occurs during sintering or curing.Type: GrantFiled: October 5, 2001Date of Patent: February 7, 2006Assignee: Jeneric/Pentron IncorporatedInventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Publication number: 20050127544Abstract: Lithium disilicate based glass-ceramics contain high strength ceramic components for use in the manufacture of dental products. The glass-ceramics have good pressability, i.e., the ability to be formed into dental products by heat-pressing using commercially available equipment. The strength of the dental articles is increased with the inclusion of the high strength ceramic components.Type: ApplicationFiled: October 8, 2004Publication date: June 16, 2005Inventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera, Arun Prasad, Ajit Karmaker, Elie Zammarieh, Gregg Daskalon, Martin Schulman
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Publication number: 20040245663Abstract: A ceramic tape is provided in its green state so that it is malleable and formable to a mold for forming a dental restoration, but will not break or crack as it is applied to the mold. Pressure may be applied to further form or adapt the ceramic tape to the shape of the mold. Heat is applied simultaneously with pressure or in a separate step to achieve high density and strength in the ceramic material. A vacuum atmosphere may be used with the application of pressure and/or heat. One or more layers of surface material such as porcelain or composite resin may be applied to the ceramic to form the dental restoration. The process is useful in the manufacture of dental materials or restorations including but not limited to orthodontic appliances, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, posts; teeth, jackets, inlays, onlays, facing, veneers, facets, implants, abutments, cylinders, and connectors.Type: ApplicationFiled: September 10, 2003Publication date: December 9, 2004Inventors: Joseph A. MacDougald, Carlino Panzera, Weitao Jia, Dmitri Brodkin, Martin L. Schulman, Paul Panzera, Bruce Alpert
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Publication number: 20040232576Abstract: A method of making a dental restoration comprising forming a ceramic core or an alloy framework; pressing a porcelain onto the core or framework, wherein the porcelain comprises an amorphous glass phase with a maturing temperature less than about 850° C., wherein the amorphous glass phase, in one embodiment, comprises: 1 Component Amount (wt. %) SiO2 55-75 B2O3 2.6-6 Al2O3 3-4.9 ZnO 0-3 CaO 0-3 MgO 0.5-3 ZrO2 0-3 BaO 0-2 Li2O 0.8-2 K2O 0-6.Type: ApplicationFiled: February 20, 2003Publication date: November 25, 2004Inventors: Dmtri Brodkin, Carlino Panzera, Paul Panzera
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Patent number: 6802894Abstract: This invention is directed to lithium disilicate (Li2Si2O5) based glass-ceramics comprising silica, lithium oxide, alumina, potassium oxide and phosphorus pentoxide. The glass-ceramics are useful in the fabrication of single and multi-unit dental restorations (e.g. anterior bridges) made by heat pressing into refractory investment molds produced using lost wax techniques. The glass-ceramics have good pressability, i.e., the ability to be formed into dental articles by heat-pressing using commercially available equipment. In accordance with one embodiment directed to the process of making the glass-ceramics, the compositions herein are melted at about 1200 ° to about 1600 ° C., thereafter cast into steel molds in the shape of cylindrical blanks (pellets), or alternately, cooled to the crystallization temperature. The resulting glass blank are heat-treated to form glass-ceramic blanks via a one or two step heat-treatment cycle preferably in the temperature range of about 400 ° to about 1100 ° C.Type: GrantFiled: June 25, 2002Date of Patent: October 12, 2004Assignee: Jeneric/Pentron IncorporatedInventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Patent number: 6761760Abstract: Opaque porcelains for use with metal cores in the manufacture of PFM restorations. The porcelains exhibit a coefficient of thermal expansion (CTE) substantially equal to or slightly above the CTE of the metal to which it is applied. The porcelains exhibit a CTE equal to or up to about 1.5×10−6/° C. higher than the dental alloys to which they are applied as the opaque. The porcelains are fabricated from a mixture of two frit compositions. A high expansion, leucite containing frit is combined with a low melting glass frit to provide a porcelain having an expansion in the range of 16.9 to about 18.5×10−6/° C. in the temperature range of 250°-600° C.Type: GrantFiled: June 12, 2002Date of Patent: July 13, 2004Assignee: Pentron CorporationInventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Patent number: 6648645Abstract: A ceramic tape is provided in its green state so that it is malleable and formable to a mold for forming a dental restoration, but will not break or crack as it is applied to the mold. Pressure may be applied to further form or adapt the ceramic tape to the shape of the mold. Heat is applied simultaneously with pressure or in a separate step to achieve high density and strength in the ceramic material. A vacuum atmosphere may be used with the application of pressure and/or heat. One or more layers of surface material such as porcelain or composite resin may be applied to the ceramic to form the dental restoration. The process is useful in the manufacture of dental materials or restorations including but not limited to orthodontic appliances, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, posts, teeth, jackets, inlays, onlays, facing, veneers, facets, implants, abutments, cylinders, and connectors.Type: GrantFiled: September 1, 2000Date of Patent: November 18, 2003Assignee: Jeneric/Pentron IncorporatedInventors: Joseph A. MacDougald, Carlino Panzera, Weitao Jia, Dmitri Brodkin, Martin L. Schulman, Paul Panzera, Bruce Alpert
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Patent number: 6645285Abstract: Micaceous glass-ceramics are useful in the fabrication of single and multi-unit dental restorations including but not limited to orthodontic appliances, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, posts, teeth, jackets, inlays, onlays, facing, veneers, facets, implants, abutments, cylinders, and connectors by machining the glass-ceramic using CAM/CAM devices. The micaceous glass-ceramics are provided in a plurality of shades and colors to adequately match the colors and shades of teeth found in 95% or more of the human population.Type: GrantFiled: February 4, 2002Date of Patent: November 11, 2003Assignee: Pentron CorporationInventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Publication number: 20030183964Abstract: High strength ceramic components for use in dental applications are provided wherein one or more layers of ceramic material is disposed on a high strength ceramic component to provide a dental restoration. The ceramic material may be applied in the form of powder, putty, tape a pellet.Type: ApplicationFiled: January 17, 2003Publication date: October 2, 2003Inventors: Gregg Daskalon, Dmitri Brodkin, Ajit Karmaker, Elie Zammarieh, Martin L. Schulman, Arun Prasad, Carlino Panzera, Paul Panzera
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Publication number: 20030122270Abstract: Opaque porcelains for use with metal cores in the manufacture of PFM restorations. The porcelains exhibit a coefficient of thermal expansion (CTE) substantially equal to or slightly above the CTE of the metal to which it is applied. The porcelains exhibit a CTE equal to or up to about 1.5×10−6/° C. higher than the dental alloys to which they are applied as the opaque. The porcelains are fabricated from a mixture of two frit compositions. A high expansion, leucite containing frit is combined with a low melting glass frit to provide a porcelain having an expansion in the range of 16.9 to about 18.5×10−6/° C. in the temperature range of 25°-600° C.Type: ApplicationFiled: June 12, 2002Publication date: July 3, 2003Inventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Patent number: 6554615Abstract: A dental porcelain composition comprises an amorphous glass phase with a maturing temperature less than about 850° C., wherein the amorphous glass phase, in one embodiment, comprises: Component Amount (wt. %) SiO2 55-75 B2O3 2.6-6 Al2O3 3-4.9 ZnO 0-3 CaO 0-3 MgO 0.5-3 ZrO2 0-3 BaO 0-2 Li2O 0.8-2 K2O 0-6.Type: GrantFiled: June 30, 2000Date of Patent: April 29, 2003Assignee: Pentron Laboratory Technologies, LLCInventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Publication number: 20030073563Abstract: This invention is directed to lithium disilicate (Li2Si2O5) based glass-ceramics comprising silica, lithium oxide, alumina, potassium oxide and phosphorus pentoxide. The glass-ceramics are useful in the fabrication of single and multi-unit dental restorations (e.g. anterior bridges) made by heat pressing into refractory investment molds produced using lost wax techniques. The glass-ceramics have good pressability, i.e., the ability to be formed into dental articles by heat-pressing using commercially available equipment. In accordance with one embodiment directed to the process of making the glass-ceramics, the compositions herein are melted at about 1200° to about 1600° C., thereafter quenched (e.g., water quenched or roller quenched) or cast into steel molds, or alternately, cooled to the crystallization temperature. The resulting glass is heat-treated to form a glass-ceramic via a one or two step heat-treatment cycle preferably in the temperature range of about 400° to about 1100° C.Type: ApplicationFiled: June 25, 2002Publication date: April 17, 2003Inventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Patent number: 6533969Abstract: Process for the manufacture of dental restorations using high strength ceramic components. A wax pattern is built around a high strength ceramic component on a die. The wax pattern with the high strength ceramic component is surrounded with investment material. The wax is burned out, leaving a mold with the high strength ceramic component. The mold is filled with a ceramic material, covering the high strength ceramic component, creating a dental restoration.Type: GrantFiled: September 26, 2000Date of Patent: March 18, 2003Assignee: Jeneric/Pentron, Inc.Inventors: Gregg Daskalon, Dmitri Brodkin, Ajit Karmaker, Elie Zammarieh, Martin L. Schulman, Arun Prasad, Carlino Panzera, Paul Panzera
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Patent number: 6517623Abstract: This invention is directed to lithium disilicate (Li2Si2O5) based glass-ceramics comprising silica, lithium oxide, alumina, potassium oxide and phosphorus pentoxide. The glass-ceramics are useful in the fabrication of single and multi-unit dental restorations (e.g. anterior bridges) made by heat pressing into refractory investment molds produced using lost wax techniques. The glass-ceramics have good pressability, i.e., the ability to be formed into dental articles by heat-pressing using commercially available equipment. In accordance with one embodiment directed to the process of making the glass-ceramics, the compositions herein are melted at about 1200° to about 1600° C., thereafter quenched (e.g., water quenched or roller quenched) or cast into steel molds, or alternately, cooled to the crystallization temperature. The resulting glass is heat-treated to form a glass-ceramic via a one or two step heat-treatment cycle preferably in the temperature range of about 400° to about 1100° C.Type: GrantFiled: August 17, 2000Date of Patent: February 11, 2003Assignee: Jeneric/Pentron, Inc.Inventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Publication number: 20020157570Abstract: Micaceous glass-ceramics are useful in the fabrication of single and multi-unit dental restorations including but not limited to orthodontic appliances, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, posts, teeth, jackets, inlays, onlays, facing, veneers, facets, implants, abutments, cylinders, and connectors by machining the glass-ceramic using CAM/CAM devices. The micaceous glass-ceramics are provided in a plurality of shades and colors to adequately match the colors and shades of teeth found in 95% or more of the human population.Type: ApplicationFiled: February 4, 2002Publication date: October 31, 2002Inventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Publication number: 20020155412Abstract: 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 sofi-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: ApplicationFiled: December 18, 2001Publication date: October 24, 2002Inventors: Carlino Panzera, Dmitri Brodkin, Paul Panzera
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Patent number: 6455451Abstract: This invention is directed to lithium disilicate (Li2Si2O5) based glass-ceramics comprising silica, lithium oxide, alumina, potassium oxide and phosphorus pentoxide. The glass-ceramics are useful in the fabrication of single and multi-unit dental restorations (e.g. anterior bridges) made by heat pressing into refractory investment molds produced using lost wax techniques. The glass-ceramics have good pressability, i.e., the ability to be formed into dental articles by heat-pressing using commercially available equipment. In accordance with one embodiment directed to the process of making the glass-ceramics, the compositions herein are melted at about 1200° to about 1600° C., thereafter quenched (e.g., water quenched or roller quenched) or cast into steel molds, or alternately, cooled to the crystallization temperature. The resulting glass is heat-treated to form a glass-ceramic via a one or two step heat-treatment cycle preferably in the temperature range of about 400° to about 1100° C.Type: GrantFiled: December 10, 1999Date of Patent: September 24, 2002Assignee: Jeneric/Pentron, Inc.Inventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera
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Patent number: 6428614Abstract: Opaque porcelains for use with metal cores in the manufacture of PFM restorations. The porcelains exhibit a coefficient of thermal expansion (CTE) substantially equal to or slightly above the CTE of the metal to which it is applied. The porcelains exhibit a CTE equal to or up to about 1.5×10−6/° C. higher than the dental alloys to which they are applied as the opaque. The porcelains are fabricated from a mixture of two frit compositions. A high expansion, leucite containing frit is combined with a low melting glass frit to provide a porcelain having an expansion in the range of 16.9 to about 18×10−6/° C. in the temperature range of 25°-500° C.Type: GrantFiled: June 29, 2000Date of Patent: August 6, 2002Assignee: Jeneric/Pentron, Inc.Inventors: Dmitri Brodkin, Carlino Panzera, Paul Panzera