The data from {HEAD ~ the several frames} are registered to each other to provide a complete three dimensional virtual model of {TAIL ~ the dentition} 
The data from { HEAD ~ the several frames } are registered to each other to provide a complete three dimensional virtual model of { TAIL ~ the dentition }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL