Prosthetic joint with alignment feature

A prosthetic joint, comprising:

• (a) a first member including a bone-implantable surface, the first member comprising a rigid material and including a body having a cantilevered perimeter flange extending therefrom, the flange defining a wear-resistant, concave first contact surface having a protruding rim and a recessed central portion;
• and
• (b) a second member including a bone-implantable surface, the second member comprising a rigid material with a wear-resistant, convex second contact surface;
• (c) where the first and second contact surfaces bear directly against each other so as to transfer axial and lateral loads from one of the members to the other, while allowing pivoting motion between the two members;
• (d) wherein the flange is shaped and sized so as to deform elastically and permit the first contact surface to conform in an irregular shape to the second contact surface when the joint is placed under a predetermined load;
• and
• (e) wherein at least one of the bone-implantable surfaces includes at least one mechanical feature configured to maintain the associated member in a specific position and/or orientation relative to bone, either during or after implantation.