A metacarpophalangeal prosthesis includes {HEAD ~ a metacarpal component} having {TAIL ~ a head portion} and a phalangeal component having a socket portion 
A metacarpophalangeal prosthesis includes { HEAD ~ a metacarpal component } having { TAIL ~ a head portion } and a phalangeal component having a socket portion
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH