1. A registration apparatus for locating reference points between two cranio-facial electronic data sets relating to a patient, comprising: a) a U-shaped member for placement in the mouth of the patient; b) a registration marker cooperatively connected to the U-shaped member; c) a first set of electronic data, the first set of data including position information of the registration marker, wherein the first set of electronic data is generated by a CAT scan; and d) a second set of electronic data, the second set of data including position information of the registration marker and generated by a light based scanner, wherein the registration marker is constructed of a material such that the spatial location of the registration means is recorded during the collection of each of the two electronic data sets, whereby the two data sets may be combined by matching the recorded location of the registration marker on the two electronic data sets.