Ka K Cheang from Hayward, CA, age 38

Digitally Modeling The Deformation Of Gingival
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US Patent:

6514074, Feb 4, 2003
Filed:

May 14, 1999
Appl. No.:

09/311716
Inventors:

Muhammad Chishti - Menlo Park CA
Huafeng Wen - Redwood Shores CA
Elena Pavlovskaia - San Francisco CA
Ka Man Cheang - Mountain View CA
Assignee:

Align Technology, Inc. - Santa Clara CA
International Classification:

A61C 300
US Classification:

433 24, 433213
Abstract:

A computer obtains a digital model of a patients dentition, including a dental model representing the patients teeth at a set of initial positions and a gingival model representing gum tissue surrounding the teeth. The computer then derives from the digital model an expected deformation of the gum tissue as the teeth move from the initial positions to another set of positions.

Digitally Modeling The Deformation Of Gingival Tissue During Orthodontic Treatment
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US Patent:

6685470, Feb 3, 2004
Filed:

Oct 24, 2002
Appl. No.:

10/280556
Inventors:

Muhammad Chishti - Menlo Park CA
Huafeng Wen - Redwood Shores CA
Elena Pavlovskaia - San Francisco CA
Ka Man Cheang - Sunnyvale CA
Assignee:

Align Technology, Inc. - Santa Clara CA
International Classification:

A61C 300
US Classification:

433 24
Abstract:

A computer obtains a digital model of a patients dentition, including a dental model representing the patients teeth at a set of initial positions and a gingival model representing gum tissue surrounding the teeth. The computer then derives from the digital model an expected deformation of the gum tissue as the teeth move from the initial positions to another set of positions.

Digitally Modeling The Deformation Of Gingival Tissue During Orthodontic Treatment
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US Patent:

6948931, Sep 27, 2005
Filed:

Oct 22, 2003
Appl. No.:

10/691942
Inventors:

Muhammad Chishti - Sunnyvale CA, US
Huafeng Wen - Redwood Shores CA, US
Elena Pavlovskaia - San Francisco CA, US
Ka Man Cheang - Sunnyvale CA, US
Assignee:

Align Technology, Inc. - Santa Clara CA
International Classification:

A61C003/00
US Classification:

433 24, 433213
Abstract:

A computer obtains a digital model of a patient's dentition, including a dental model representing the patient's teeth at a set of initial positions and a gingival model representing gum tissue surrounding the teeth. The computer then derives from the digital model an expected deformation of the gum tissue as the teeth move from the initial positions to another set of positions.

System And Method For Detecting Deviations During The Course Of An Orthodontic Treatment To Gradually Reposition Teeth
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US Patent:

8075306, Dec 13, 2011
Filed:

Jun 8, 2007
Appl. No.:

11/760612
Inventors:

Ian Kitching - Saratoga CA, US
Ka M. Cheang - Santa Clara CA, US
Assignee:

Align Technology, Inc. - San Jose CA
International Classification:

A61C 3/00
US Classification:

433 24, 382128
Abstract:

Method and system for detecting and correcting deviation during an orthodontic treatment plan is provided. The method includes the steps of receiving an un-segmented current teeth image representing a patient's teeth after an orthodontic treatment plan has begun and before the plan ends for the patient; matching a previously segmented teeth model with the current teeth image; and generating at least one corrective stage to define an intermediate tooth arrangement, wherein the at least one corrective stage repositions a digital teeth image so that a prescribed tooth arrangement of the previously segmented teeth model can be used.

System And Method For Detecting Deviations During The Course Of An Orthodontic Treatment To Gradually Reposition Teeth
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US Patent:

8636510, Jan 28, 2014
Filed:

Nov 10, 2011
Appl. No.:

13/293916
Inventors:

Ian Kitching - Saratoga CA, US
Ka Man Cheang - Sunnyvale CA, US
Assignee:

Align Technology, Inc. - San Jose CA
International Classification:

A61C 3/00
US Classification:

433 24, 382128
Abstract:

Method and system for detecting and correcting deviation during an orthodontic treatment plan is provided. The method includes the steps of receiving an un-segmented current teeth image representing a patient's teeth after an orthodontic treatment plan has begun and before the plan ends for the patient; matching a previously segmented teeth model with the current teeth image; and generating at least one corrective stage to define an intermediate tooth arrangement, wherein the at least one corrective stage repositions a digital teeth image so that a prescribed tooth arrangement of the previously segmented teeth model can be used.

System And Method For Positioning Three-Dimensional Brackets On Teeth
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US Patent:

20080096152, Apr 24, 2008
Filed:

Oct 20, 2006
Appl. No.:

11/551605
Inventors:

Ka Man Cheang - Sunnyvale CA, US
Assignee:

ALIGN TECHNOLOGY, INC. - Santa Clara CA
International Classification:

A61C 3/00
US Classification:

433 24
Abstract:

System and methods for positioning 3D virtual brackets on teeth for the precise positioning of conventional brackets and wire. Various reference features may be calculated for the teeth and used to calculate a position for the virtual bracket. Reference features that are calculated include curve of Spee, Andrew's plane, and a facial axis of the clinical crown for the teeth.

Systems And Methods For Removing Gingiva From Teeth
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US Patent:

6386878, May 14, 2002
Filed:

Aug 16, 2000
Appl. No.:

09/640328
Inventors:

Elena Pavlovskaia - San Francisco CA
Venkata S. Sarva - Fremont CA
Ka Man Cheang - Sunnyvale CA
Assignee:

Align Technology, Inc. - Santa Clara CA
International Classification:

A61C 500
US Classification:

433215
Abstract:

A computer-implemented method separates gingiva from a model of a tooth by defining a cutting surface along the gingiva; and applying the cutting surface to the tooth to separate the gingiva from the tooth.

System And Method For Detecting Deviations During The Course Of An Orthodontic Treatment To Gradually Reposition Teeth
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US Patent:

20200237477, Jul 30, 2020
Filed:

Apr 17, 2020
Appl. No.:

16/852251
Inventors:

- San Jose CA, US
Ka M. Cheang - Sunnyvale CA, US
International Classification:

A61C 7/00
G16H 50/50
Abstract:

Method and system for detecting and correcting deviation during an orthodontic treatment plan is provided. The method includes the steps of receiving an un-segmented current teeth image representing a patient's teeth after an orthodontic treatment plan has begun and before the plan ends for the patient; matching a previously segmented teeth model with the current teeth image; and generating at least one corrective stage to define an intermediate tooth arrangement, wherein the at least one corrective stage repositions a digital teeth image so that a prescribed tooth arrangement of the previously segmented teeth model can be used.