WO2005009268A3 - Automatic crown and gingiva detection from three-dimensional virtual model of teeth - Google Patents

Automatic crown and gingiva detection from three-dimensional virtual model of teeth Download PDF

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Publication number
WO2005009268A3
WO2005009268A3 PCT/US2004/021956 US2004021956W WO2005009268A3 WO 2005009268 A3 WO2005009268 A3 WO 2005009268A3 US 2004021956 W US2004021956 W US 2004021956W WO 2005009268 A3 WO2005009268 A3 WO 2005009268A3
Authority
WO
WIPO (PCT)
Prior art keywords
model
teeth
saddle points
local maxima
gingival tissue
Prior art date
Application number
PCT/US2004/021956
Other languages
French (fr)
Other versions
WO2005009268A2 (en
Inventor
Markus Kaufmann
Peer Sporbert
Phillip Getto
Original Assignee
Orametrix Inc
Markus Kaufmann
Peer Sporbert
Phillip Getto
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orametrix Inc, Markus Kaufmann, Peer Sporbert, Phillip Getto filed Critical Orametrix Inc
Publication of WO2005009268A2 publication Critical patent/WO2005009268A2/en
Publication of WO2005009268A3 publication Critical patent/WO2005009268A3/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0012—Biomedical image inspection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/12—Edge-based segmentation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/002—Orthodontic computer assisted systems
    • A61C2007/004—Automatic construction of a set of axes for a tooth or a plurality of teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/002—Orthodontic computer assisted systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2200/00—Indexing scheme for image data processing or generation, in general
    • G06T2200/04—Indexing scheme for image data processing or generation, in general involving 3D image data
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2200/00—Indexing scheme for image data processing or generation, in general
    • G06T2200/24—Indexing scheme for image data processing or generation, in general involving graphical user interfaces [GUIs]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10028—Range image; Depth image; 3D point clouds
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30004—Biomedical image processing
    • G06T2207/30036—Dental; Teeth

Abstract

A method is provided for automatically separating tooth crowns and gingival tissue in a virtual three-dimensional model of teeth and associated anatomical structures. The method orients the model with reference to a plane and automatically determines local maxima of the model and areas bounded by the local maxima. The method automatically determines saddle points between the local maxima in the model, the saddle points corresponding to boundaries between teeth. The method further positions the saddle points along a dental arch form. For each tooth, the method automatically identifies a line or path along the surface of the model linking the saddle points to each other, the path marking a transition between teeth and gingival tissue and between adjacent teeth in the model. The areas bounded by the lines correspond to the tooth crowns; the remainder of the model constitutes the gingival tissue.
PCT/US2004/021956 2003-07-23 2004-07-09 Automatic crown and gingiva detection from three-dimensional virtual model of teeth WO2005009268A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/626,796 2003-07-23
US10/626,796 US7004754B2 (en) 2003-07-23 2003-07-23 Automatic crown and gingiva detection from three-dimensional virtual model of teeth

Publications (2)

Publication Number Publication Date
WO2005009268A2 WO2005009268A2 (en) 2005-02-03
WO2005009268A3 true WO2005009268A3 (en) 2005-10-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/021956 WO2005009268A2 (en) 2003-07-23 2004-07-09 Automatic crown and gingiva detection from three-dimensional virtual model of teeth

Country Status (2)

Country Link
US (3) US7004754B2 (en)
WO (1) WO2005009268A2 (en)

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Also Published As

Publication number Publication date
US7530811B2 (en) 2009-05-12
US7004754B2 (en) 2006-02-28
US20090220918A1 (en) 2009-09-03
US20050019732A1 (en) 2005-01-27
WO2005009268A2 (en) 2005-02-03
US20060134581A1 (en) 2006-06-22
US8047847B2 (en) 2011-11-01

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