The metacarpophalangeal prosthesis 1, wherein said head portion of said metacarpal component defines a spherical surface and {TAIL ~ said means} for substantially limiting radial and ulnar deviation further includes a groove formed in said spherical surface, said groove having a curved portion and a notched portion defined by a pair of {HEAD ~ intersecting walls} 
The metacarpophalangeal prosthesis 1 , wherein said head portion of said metacarpal component defines a spherical surface and { TAIL ~ said means } for substantially limiting radial and ulnar deviation further includes a groove formed in said spherical surface , said groove having a curved portion and a notched portion defined by a pair of { HEAD ~ intersecting walls }
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