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