Bone prosthesis with porous coating

Details Bone prosthesis with porous coating Bone prosthesis with porous coating

A - Human Necessities

61

F

3/100, 117/109

A61F 2/00 (2006.01) A61F 2/30 (2006.01) B22F 7/00 (2006.01) A61F 2/38 (2006.01)

Patent

CA 1227002

BONE PROSTHESIS WITH POROUS COATING Abstract of the Disclosure An improved metallic bone prosthesis having a porous coating for bone ingrowtn or interlocking with bone cement is disclosed. The porous coating comprises two layers of generally ball-shaped metallic particles bonded together at their points of contact, e.g. by sintering, and defining between them a plurality of connected interstitial pores having an average pore size of from about 350 microns to about 500 microns. A high resistance to failure at the coating-substrate and bone-coating (or cement- coating) interfaces is achieved with the use of the improved prosthesis. Also disclosed are a novel method for affixing the porous coating to a metal substrate, and a knee joint prosthesis having bearing portions designed so that the function of said prosthesis closely approximates that of the natural knee.

421731

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