Patent ID: 9408706
Filing Date: 2016-08-09
CPC Classification: A61F

Claim Text:
1. A trapeziometacarpal joint implant, the implant comprising a body defining: a median plane, a metacarpal joint surface and a trapezium joint surface, the metacarpal joint surface having a first central region extending from a center of the trapeziometacarpal joint implant toward a periphery of the trapeziometacarpal joint implant and the trapezium joint surface having a second central region extending from the center of the trapeziometacarpal joint implant toward the periphery of the trapeziometacarpal joint implant, the first central region being situated on an opposite side of the median plane from the second central region, the first and second central regions corresponding to profiles of a first axial segment and a second axial segment, respectively, the first and second axial segments each being one of a cylinder, a cone and a torus and being centered on a first axis and a second axis, respectively, the first and second axes, as projected on the median plane, being perpendicular to each other; wherein the metacarpal joint surface further defines a first peripheral region adjacent the first central region and the first axial segment has a first cross section that has a smaller radius of curvature in the first central region of the metacarpal joint surface than in the first peripheral region of the metacarpal joint surface.