One end of {TAIL ~ the prosthesis} is shaped to mate with the remaining segment of {HEAD ~ bone} 
One end of { TAIL ~ the prosthesis } is shaped to mate with the remaining segment of { HEAD ~ bone }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD