Patent ID: 9486322
Filing Date: 2016-11-08
CPC Classification: A61F

Claim Text:
1. A prosthesis for use in a carpometacarpal prosthesis system, comprising: a non-resorbable trapezial implant for replacing a removed trapezium, wherein the trapezial implant is selected from a group of body tolerant materials consisting of; polyethylene, titanium, a cobalt/chrome alloy or a ceramic, said trapezial implant configured to help replicate a natural first metacarpal motion in three planes of motion when coupled to a partially excised first metacarpal bone in a hand of the removed trapezium; and a first metacarpal implant for coupling said trapezial implant to said partially excised first metacarpal bone and enabling said trapezial implant and said partially excised first metacarpal bone to cooperate with one another to carry out natural thumb motions of adduction, abduction and opposition; wherein the first metacarpal implant has a unitary construction including a tapered distal end portion for implanting into the partially excised first metacarpal bone, a flanged collar for abutment against a proximal end of the partially excised first metacarpal bone, an elongated neck having a length selected to restore the partially excised first metacarpal bone to an original length before the first metacarpal bone was partially excised and a spherical head configured to couple the first metacarpal implant to the trapezial implant to replicate natural thumb motion between the first metacarpal implant and the trapezial implant; wherein the distal end portion, the flanged collar, the elongated neck and the spherical head are aligned along one common, central longitudinal axis.