The bone model produced by the present invention can be used as {HEAD ~ an optimum substitute} for {TAIL ~ the real bone} for this purpose 
for
The bone model produced by the present invention can be used as { HEAD ~ an optimum substitute } for { TAIL ~ the real bone } for this purpose
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH