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US 2008/0176182 A1Published application
System and method for electronically modeling jaw articulation
OwnerBruce Willard Hultgren, Michael C. Marshallinventors
Life of this patent
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Abstract
A system and method for determining condyle displacement during jaw articulation includes a physical model with corresponding reference points. The physical model is positioned and scanned to obtain positional data representing a first and second bite position. This positional data is used to generate a transformation matrix. The position of at least one condyle is determined in reference to positional data scanned from the physical model. The transformation matrix is used to map the position of the condyle with respect to the second bite position.
Claims20
A method for modeling jaw articulation, the method comprising:
- generating a first model representing a mandible of a patient, the first model having coordinates, the coordinates being known within a first coordinate system;
- digitizing at least three points on the mandible of the patient, wherein digitizing the points obtains coordinates for the points within a second coordinate system;
- identifying coordinates of an equal number of points on the first model within the first coordinate system corresponding to the coordinates of the digitized points;
- aligning the first model within the second coordinate system based on the digitized points;
- generating a second model representing a maxilla of the patient, the second model having coordinates, the coordinates being known within a third coordinate system;
- digitizing at least three points on the maxilla of the patient within the second coordinate system, wherein digitizing the points obtains coordinates for the points within the second coordinate system;
- identifying coordinates of an equal number of points on the second model within the third coordinate system corresponding to the coordinates of the digitized points;
- and
- aligning the second model within the second coordinate system based on the digitized points.
6 more elements
A system for modeling jaw articulation, comprising:
- means for generating a first model representing a mandible of a patient, the first model having coordinates, the coordinates being known within a first coordinate system;
- means for digitizing at least three points on the mandible of the patient, wherein digitizing the points obtains coordinates for the points within a second coordinate system;
- means for identifying coordinates of an equal number of points on the first model within the first coordinate system corresponding to the coordinates of the digitized points;
- means for aligning the first model within the second coordinate system based on the digitized points;
- means for generating a second model representing a maxilla of the patient, the second model having coordinates, the coordinates being known within a third coordinate system;
- means for digitizing at least three points on the maxilla of the patient within the second coordinate system, wherein digitizing the points obtains coordinates for the points within the second coordinate system;
- means for identifying coordinates of an equal number of points on the second model within the third coordinate system corresponding to the coordinates of the digitized points;
- and
- means for aligning the second model within the second coordinate system based on the digitized points.
6 more elements
A system for modeling jaw articulation, comprising:
- a scanner device arranged and configured to generate a first model representing a mandible of a patient, the first model having coordinates, the coordinates being known within a first coordinate system, and a second model representing a maxilla of the patient, the second model having coordinates, the coordinates being known within a third coordinate system;
- a digitizer arranged and configured to digitize at least three points on the mandible of the patient, wherein digitizing the points obtains coordinates for the points within a second coordinate system, and to digitize at least three points on the maxilla of the patient within the second coordinate system, wherein digitizing the points obtains coordinates for the points within the second coordinate system;
- and
- a processor operatively connected to the scanner and the digitizer, the processor arranged and configured to identify coordinates of an equal number of points on the first model within the first coordinate system corresponding to the coordinates of the digitized points, align the first model within the second coordinate system based on the digitized points, identify coordinates of an equal number of points on the second model within the third coordinate system corresponding to the coordinates of the digitized points, and to align the second model within the second coordinate system based on the digitized points.
1 more element
A system for modeling jaw articulation, comprising:
- a scanner device arranged and configured to generate a first model representing a mandible of a patient, the first model having coordinates, the coordinates being known within a first coordinate system, and a second model representing a maxilla of the patient, the second model having coordinates, the coordinates being known within a third coordinate system;
- a digitizer device including both translation and rotation measurements wherein three translations and three rotations are measured in order to capture six degrees of freedom, the digitizer capturing at least three points on the mandible of the patient, wherein capturing the points obtains coordinates for the points within a second coordinate system, and to capture at least three points on the maxilla of the patient within the second coordinate system, wherein capturing the points obtains coordinates for the points within the second coordinate system;
- and
- a processor operatively connected to the scanner and the digitizer, the processor arranged and configured to identify coordinates of an equal number of points on the first model within the first coordinate system corresponding to the coordinates of the captured points, align the first model within the second coordinate system based on the captured points, identify coordinates of an equal number of points on the second model within the third coordinate system corresponding to the coordinates of the captured points, and to align the second model within the second coordinate system based on the captured points.
1 more element
Dependencies are inferred from the claim text.