Orthopedic implants and methods

A prosthesis for replacing a natural articular surface on bone, the prosthesis comprising:

• a joint facing side comprising an articular surface;
• a bone anchoring side comprising a bone engagement surface;
• and
• a bone engagement pad secured to at least part of the bone engagement surface, the bone engagement pad comprising:
• a transverse portion configured to extend transverse to a length of the bone;
• and
• wherein the bone engagement pad has a thickness within the range of 0.5 mm to 1.5 mm;
• wherein the bone engagement pad comprises a pad bone-facing surface and a pad joint-facing surface on opposite sides of the bone engagement pad, and the transverse portion comprises a porosity gradient by which porosity of the transverse portion gradually increases toward the pad bone-facing surface.

A prosthesis for replacing a natural articular surface on bone, the prosthesis comprising:

• a joint facing side comprising an articular surface;
• a bone anchoring side comprising a bone engagement surface;
• and
• a bone engagement pad secured to at least part of the bone engagement surface, the bone engagement pad comprising:
• a transverse portion configured to extend transverse to a length of the bone, a pad bone-facing surface and a pad joint-facing surface are on opposite sides of the bone engagement pad, and the transverse portion comprises a porosity gradient by which porosity of the transverse portion gradually increases toward the pad bone-facing surface;
• wherein:
• the bone engagement surface comprises one or more bone engagement features extending through one or more corresponding apertures formed in the transverse portion.