An image guidance system for tracking a surgical instrument during oral surgery comprising: a fixture configured to be removably attached to one or more teeth in a patient's mouth in a location near a surgical area; a first tracking assembly including a bracket assembly removably attached to the fixture and a first tracking pattern surface, the first tracking pattern surface including a first optically visible pattern, the bracket assembly positioning the first tracking pattern at a location spaced apart from the surgical area; a tool for use in the surgical procedure; a second tracking assembly including a second tracking pattern surface mounted to the tool, the second tracking pattern surface including a second optically visible pattern; a plurality of cameras mounted away from the surgical area at a position that permits the cameras, when activated, to capture images of the optically visible patterns on the first and second tracking pattern surfaces (208, 306); a reference dataset including the location and orientation of the fixture with respect to a scan of the surgical area; and a processing system to process the captured images and configured to recognize the optically visible patterns and triangulate the locations and orientations of the first and second tracking assemblies (200, 300), the processing system determining the location and orientation of the tracked tool based on the reference dataset and analyzing relative transforms between each camera of the optically visible patterns on the first and second tracking pattern surfaces (208, 306), characterised in that the fixture includes a rigid support including a base, and an inner wall and an outer wall integrally attached to and extending outward from the base, the spacing of the inner and outer walls (18, 20) being larger than the width of the teeth of the patient, a moldable material on a lower surface of the base adapted to be secured to the patient's teeth in a cured state, a plurality of fiducial markers mounted on the support so as to be positioned within the patient's mouth, the fiducial markers having a radiodensity that is different than the fixture, at least one flange extending outwardly from the outer wall; and wherein the bracket assembly includes a bracket mount that is removably attached to the flange on the fixture, a tracking mount that is attached to the first tracking pattern surface, and a support arm that attaches the bracket mount to the tracking mount. a fixture configured to be removably attached to one or more teeth in a patient's mouth in a location near a surgical area; a first tracking assembly including a bracket assembly removably attached to the fixture and a first tracking pattern surface, the first tracking pattern surface including a first optically visible pattern, the bracket assembly positioning the first tracking pattern at a location spaced apart from the surgical area; a tool for use in the surgical procedure; a second tracking assembly including a second tracking pattern surface mounted to the tool, the second tracking pattern surface including a second optically visible pattern; a plurality of cameras mounted away from the surgical area at a position that permits the cameras, when activated, to capture images of the optically visible patterns on the first and second tracking pattern surfaces (208, 306); a reference dataset including the location and orientation of the fixture with respect to a scan of the surgical area; and a processing system to process the captured images and configured to recognize the optically visible patterns and triangulate the locations and orientations of the first and second tracking assemblies (200, 300), the processing system determining the location and orientation of the tracked tool based on the reference dataset and analyzing relative transforms between each camera of the optically visible patterns on the first and second tracking pattern surfaces (208, 306), characterised in that the fixture includes a rigid support including a base, and an inner wall and an outer wall integrally attached to and extending outward from the base, the spacing of the inner and outer walls (18, 20) being larger than the width of the teeth of the patient, a moldable material on a lower surface of the base adapted to be secured to the patient's teeth in a cured state, a plurality of fiducial markers mounted on the support so as to be positioned within the patient's mouth, the fiducial markers having a radiodensity that is different than the fixture, at least one flange extending outwardly from the outer wall; and wherein the bracket assembly includes a bracket mount that is removably attached to the flange on the fixture, a tracking mount that is attached to the first tracking pattern surface, and a support arm that attaches the bracket mount to the tracking mount.