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Image guided navigation system

  • US 9,844,324 B2
  • Filed: 03/13/2014
  • Issued: 12/19/2017
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. An oral fixture for an image guidance system for tracking and depicting movement of a surgical tool during oral surgery, the oral fixture removably attachable to at least one tooth in a patient'"'"'s mouth, the oral fixture comprising:

  • a plastic support made from a rigid material that will not substantially deform when subjected to temperatures of about 100 degrees F., the support including a base with an inner wall and an outer wall, the inner wall and outer wall extending outward at an angle from the base, the inner and outer walls being spaced from each other so as to be adapted to receive a tooth to which the oral fixture is intended to be attached;

    a moldable thermoplastic material located on an inner surface of the support, the moldable material configured upon curing to retain an impression of the outside contours of a portion of a patient'"'"'s teeth that were covered by the material;

    a mount on an outside surface of the outer wall for holding a tracking component in an image guidance system; and

    at least three fiducial markers rigidly attached to an outer surface of the base for use in determining the location of the oral fixture relative to the patient'"'"'s teeth, the fiducial markers being made from a material that has a different radiodensity than the support, the moldable material and the patient'"'"'s teeth so as to be detectable in a CT scan, the fiducial markers being spaced apart from one another in a triangular pattern with at least two fiducial markers located substantially in line with one of either the inner or outer walls, and the other fiducial marker located substantially in line with the other of either the inner or outer walls.

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