Patent ID: 9173691
Filing Date: 2015-11-03
Classification: A61B,A61F

Abstract:
1. A prosthesis for a first bone of a joint, comprising: a head portion adapted to articulate with a second bone of the joint, said head portion including an articular surface emulating a native post-osteotomy articular surface of the first bone, said articular surface including a saddle shaped articular surface that is circularly concave in a dorsal-palmar plane and circularly convex in a lateral-medial plane; the head portion including a dorsal lip and a palmar lip, the palmar lip protruding beyond the dorsal lip such that a line tangent to a most proximal point on the dorsal lip that is also tangent to a most proximal point on the palmar lip will be inclined at an angle of more than 270 degrees relative to a longitudinal axis through the prosthesis; a stem portion adapted for insertion into the medullary cavity of the first bone; and a keel portion extending from a palmar side of said stem.