In-situ oxidized textured surfaces for prosthetic devices and method of making same
AssigneeSmith & Nephew, Inc.
InventorsGordon Hunter, Randy Fesmire, Harsh Gupta, Daniel Heuer
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Abstract
A textured surface and oxidation layer coating on a metallic material is accomplished through the chemical and/or electrochemical etching of the surface to modify the surface texture and an in-situ oxidation procedure. The surface is useful for the fabrication of prosthetic devices, particularly medical implants, due to the corrosion and wear resistance imparted by the oxidation layer and the ability to enhance grafting of the implant onto bone imparted by the surface texture.
Claims47
A method of producing a modified surface on a metallic substrate comprising the steps of:
- modifying the texture of at least a portion of the surface of said metallic substrate;
- and,
- oxidizing at least a portion of the surface of said metallic substrate to form a diffusion hardened surface on said metallic substrate.
A prosthesis for implantation comprising a metallic prosthesis body having
- (a) an implant portion for inserting into the body tissue of the patient,
- (b) a bearing surface comprising at least one condyle on the prosthesis body;
- and,
- (c) a tibial component adapted to cooperate with the bearing surface;
- wherein at least a portion of the surface of said prosthesis body is texture-modified;
- and,
- wherein at least a portion of the surface of said prosthesis body comprises a diffusion hardened oxidation layer.
A prosthesis for implantation comprising:
- a metallic prosthesis body for implantation into a femor having
- (a) a head portion;
- and,
- (b) a bearing surface on the head portion;
- an acetabular cup having an inner surface adapted to cooperate with the bearing surface on the head portion;
- wherein at least a portion of the surface of said metallic prosthesis body is texture-modified;
- and,
- wherein at least a portion of the surface of said metallic prosthesis body comprises a diffusion hardened oxidation layer.
A prosthesis for implantation comprising a metallic prosthesis body having
- (a) an implant portion for insertion into the body tissue of the patient;
- (b) a bearing surface on the prosthesis body, the bearing surface being sized and shaped to engage or cooperate with a second bearing surface on another implant portion;
- and
- wherein at least a portion of the surface of said metallic prosthesis body is texture-modified;
- and,
- wherein at least a portion of the surface of said metallic prosthesis body comprises a diffusion hardened oxidation layer.
A prosthesis comprising:
- a bearing surface;
- and,
- a counter-bearing surface adapted to cooperate with the bearing surface;
- wherein at least a portion of the surface of said prosthesis is texture-modified;
- and,
- wherein at least a portion of the surface of said prosthesis comprises a diffusion hardened oxidation layer.
A medical implant for inserting into the body tissue of the patient comprising a component, wherein at least a portion of the surface of said component is texture-modified and further wherein at least a portion of the surface of said component comprises a diffusion hardened oxidation layer.
Dependencies are inferred from the claim text.