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Determining condyle displacement utilizing electronic models of dental impressions having a common coordinate system

  • US 7,824,346 B2
  • Filed: 09/19/2005
  • Issued: 11/02/2010
  • Est. Priority Date: 03/11/2004
  • Status: Active Grant
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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