Determining condyle displacement utilizing electronic models of dental impressions having a common coordinate system
First Claim
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1. A method for determining condyle displacement for a patient, the method comprising:
- mounting a first physical model onto a first scanning plate module to form a first mounting arrangement, the first physical model being representative of a first set of teeth of the patient;
mounting a second physical model onto a second scanning plate module to form a second mounting arrangement, the second physical model being representative of a second set of teeth of the patient;
positioning the first and second mounting arrangements on a base plate module to arrange the first physical model relative to the second physical model within a coordinate system of a scanning device according to a first bite record;
scanning three or more reference sites on at least one of the mounting arrangements with the scanning device to obtain a first set of positional data;
positioning the first and second mounting arrangements on the base plate module to arrange the first and second physical models within the coordinate system of the scanning device according to a second bite record;
scanning the three or more reference sites with the scanning device to obtain a second set of positional data;
determining a transformation matrix from the first and second sets of positional data with a data processing system;
determining a first location of a point corresponding to a condyle of the patient in relation to the first set of positional data;
determining with the data processing system a second location of the point corresponding to the condyle in relation to the second set of positional data based on the transformation matrix; and
generating a manipulable electronic model based on the first and second sets of positional data and the transformation matrix to assess condyle displacement of the patient.
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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.
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Citations
11 Claims
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1. A method for determining condyle displacement for a patient, the method comprising:
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mounting a first physical model onto a first scanning plate module to form a first mounting arrangement, the first physical model being representative of a first set of teeth of the patient; mounting a second physical model onto a second scanning plate module to form a second mounting arrangement, the second physical model being representative of a second set of teeth of the patient; positioning the first and second mounting arrangements on a base plate module to arrange the first physical model relative to the second physical model within a coordinate system of a scanning device according to a first bite record; scanning three or more reference sites on at least one of the mounting arrangements with the scanning device to obtain a first set of positional data; positioning the first and second mounting arrangements on the base plate module to arrange the first and second physical models within the coordinate system of the scanning device according to a second bite record; scanning the three or more reference sites with the scanning device to obtain a second set of positional data; determining a transformation matrix from the first and second sets of positional data with a data processing system; determining a first location of a point corresponding to a condyle of the patient in relation to the first set of positional data; determining with the data processing system a second location of the point corresponding to the condyle in relation to the second set of positional data based on the transformation matrix; and generating a manipulable electronic model based on the first and second sets of positional data and the transformation matrix to assess condyle displacement of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification