Image guided navigation system
First Claim
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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Accused Products
Abstract
An image guidance system for tracking a surgical instrument within the oral cavity. The image guidance system includes a plurality of cameras adapted to be located within the oral cavity to provide intraoral images of optically visible patterns within oral cavity. A processing system receives and processes the intraoral images to recognize patterns and triangulate the locations and orientations of each camera. The processing system uses a reference dataset which defines a reference coordinate system based on alignment to a portion of the oral anatomy. The processing system determines the location and orientation of the tracked instrument based on the reference dataset. In an embodiment, the system includes an oral fixture that is removably attachable to teeth in a patient and is configured to hold one of the cameras.
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Citations
18 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification