The other end of {TAIL ~ the prosthesis} is shaped to replace {HEAD ~ the other end} of the surgically removed bone segment 
The other end of { TAIL ~ the prosthesis } is shaped to replace { HEAD ~ the other end } of the surgically removed bone segment
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH