Christopher D Chu

US Patent:

8052424, Nov 8, 2011

Filed:

Feb 14, 2008

Appl. No.:

12/070076

Inventors:

Tom Cameron - Medford NJ, US
Vicky Nemzer - Newton PA, US
Al McDonald - Wallingford PA, US
Arlo King - Lumberton NJ, US
Christopher Chu - West Windsor NJ, US
Slawomir Banasiak - Kearny NJ, US

Assignee:

Dentsply International, Inc. - York PA

International Classification:

A61C 13/083
A61C 19/10
A61C 13/09
A61C 13/08
A61C 5/10

US Classification:

433223, 433 26, 4332031

Abstract:

A series of ceramic ingots is provided in which each ingot in the series, referred to as base ingots, has a shade corresponding to a different shade of a shade guide. The number of differently shaded base ingots is less than the total number of shades associated with the shade guide. A base ingot is selected from the series having a shade of a value at least as high as a shade associated with a patient's tooth. If the base ingot shade matches the patient's tooth, a restoration made with the selected base ingot can be glazed as is; otherwise the dental restoration is stained with a stain having a lower value than the selected base ingot to match the tooth. Thus, the total different number of ingot shades needed in inventory is reduced but without requiring staining in every case.

US Patent:

8110035, Feb 7, 2012

Filed:

May 30, 2008

Appl. No.:

12/156169

Inventors:

Christopher Chu - West Windsor NJ, US
Slawomir Banasiak - Kearny NJ, US
Victoriya Shtessel-Nemzer - Newtown PA, US

Assignee:

DENTSPLY International Inc. - York PA

International Classification:

A61K 6/02

US Classification:

106 35, 501 14, 501 17, 501 21, 501 29, 501 69, 501 70, 4332221, 4332021, 4332121

Abstract:

An integrated dental porcelain system for making dental prostheses and restorations is provided. The system includes three universal major components: a) opaque porcelain composition; b) pressable dentin ingot; and c) veneering porcelain composition that can be used interchangeably for making restorations. Techniques for making the prostheses and restorations include porcelain fused-to-metal (PFM), press-to-metal (PTM), and either pressed and/or machined all-ceramic methods. The system uses both a hand-layering of veneering porcelain (PFM technique) and a hot-pressing process (PTM and all-ceramic technique) to fabricate the prostheses and restorations.

US Patent:

20070196788, Aug 23, 2007

Filed:

Apr 20, 2007

Appl. No.:

11/788600

Inventors:

Christopher Chu - West Windsor NJ, US
Slawomir Banasiak - Kearny NJ, US

Assignee:

DENTSPLY International Inc. - York PA

International Classification:

A61C 13/08

US Classification:

433202100

Abstract:

A dental prosthesis, typically formed in a press to metal process, includes application of a porcelain composition sufficient to form a veneer on a dental prosthesis supporting metal structure, the composition having an integrated tooth-like translucency providing an aesthetic appearance. The composition is formed of a dentin frit and an enamel frit, typically sintered into a desired ingot shape including an amount of composition sufficient to veneer the prosthesis. The porcelain composition is a component of a kit that includes opaquers, other porcelains and stains useful in finishing to provide an aesthetic prosthesis.

US Patent:

20120111227, May 10, 2012

Filed:

Jan 5, 2012

Appl. No.:

13/343905

Inventors:

Christopher Chu - West Windsor NJ, US
Slawomir Banasiak - Kearny NJ, US
Victoriya Shtessel-Nemzer - Newtown PA, US

Assignee:

DENTSPLY INTERNATIONAL INC. - YORK PA

International Classification:

A61K 6/02

US Classification:

106 35

Abstract:

An integrated dental porcelain system for making dental prostheses and restorations is provided. The system includes three universal major components: a) opaque porcelain composition; b) pressable dentin ingot; and c) veneering porcelain composition that can be used interchangeably for making restorations. Techniques for making the prostheses and restorations include porcelain fused-to-metal (PFM), press-to-metal (PTM), and either pressed and/or machined all-ceramic methods. The system uses both a hand-layering of veneering porcelain (PFM technique) and a hot-pressing process (PTM and all-ceramic technique) to fabricate the prostheses and restorations.

US Patent:

20130209966, Aug 15, 2013

Filed:

Mar 18, 2013

Appl. No.:

13/845455

Inventors:

Christopher Chu - West Windsor NJ, US
Slawomir Banasiak - Kearny NJ, US
Victoriya Shtessel-Nemzer - Newtown PA, US

Assignee:

DENTSPLY INTERNATIONAL INC. - YORK PA

International Classification:

A61C 5/10
A61C 5/08
C09D 1/00

US Classification:

4332221, 1062864, 427 227

Abstract:

An integrated dental porcelain system for making dental prostheses and restorations is provided. The system includes three universal major components: a) opaque porcelain composition; b) pressable dentin ingot; and c) veneering porcelain composition that can be used interchangeably for making restorations. Techniques for making the prostheses and restorations include porcelain fused-to-metal (PFM), press-to-metal (PTM), and either pressed and/or machined all-ceramic methods. The system uses both a hand-layering of veneering porcelain (PFM technique) and a hot-pressing process (PTM and all-ceramic technique) to fabricate the prostheses and restorations.

US Patent:

20190038387, Feb 7, 2019

Filed:

Aug 7, 2017

Appl. No.:

15/670583

Inventors:

Christopher Chu - West Windsor NJ, US
Slawomir Banasiak - Kearny NJ, US
Victoriya Shtessel-Nemzer - Newtown PA, US

Assignee:

DENTSPLY SIRONA INC. - YORK PA

International Classification:

A61C 13/00
A61C 13/083
A61C 13/09
A61C 5/77
A61K 6/06
C03C 4/00
C03C 8/02

Abstract:

An integrated dental porcelain system for making dental prostheses and restorations is provided. The system includes three universal major components: a) opaque porcelain composition; b) pressable dentin ingot; and c) veneering porcelain composition that can be used interchangeably for making restorations. Techniques for making the prostheses and restorations include porcelain fused-to-metal (PFM), press-to-metal (PTM), and either pressed and/or machined all-ceramic methods. The system uses both a hand-layering of veneering porcelain (PFM technique) and a hot-pressing process (PTM and all-ceramic technique) to fabricate the prostheses and restorations.

US Patent:

20180098918, Apr 12, 2018

Filed:

Oct 10, 2017

Appl. No.:

15/729208

Inventors:

- York PA, US
Vicky Nemzer - Newtown PA, US
Christopher Chu - West Windsor NJ, US
Dan Ammon - York PA, US

Assignee:

DENTSPLY SIRONA Inc. - York PA

International Classification:

A61K 6/02
A61C 13/083
A61C 13/08

Abstract:

The invention is related to a shaded porcelain system that contains two types of veneering porcelains: natural enamel/dentin body and opal enamel, as well as stain & glaze porcelain, with CTE that are compatible to and which can be used for veneering a dental prosthesis made of 1) lithium disilicate-based glass-ceramic substructure that is formed by hot pressing or CAD/CAM machined process or 2) YTZP zirconia-based ceramic substructure that is formed by CAD/CAM machined process in order to improve overall esthetics of final prosthesis.