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