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US 2004/0122524 A1Published application
Bi-polar hip prosthetic devices employing diffusion-hardened surfaces
AssigneeSmith & Nephew, Inc.
InventorsGordon Hunter, Jeffrey E. Schryver, Steve Miller
Life of this patent
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Abstract
An orthopedic implant having diffusion-hardened surfaces employed at inner and outer load-bearing surfaces. Preferably, the orthopedic implant is a bipolar hip prosthetic device and system where a coating of oxidized zirconium is formed at the articulating, load-bearing surface of the acetabular component and at the articulating, load-bearing surface of the femoral head. The acetabular component has a polymeric cup, made from a bio-compatible material, such as UHMWPE.
Claims43
A bipolar hip prosthetic device comprising:
- a) an acetabular component, the acetabular having an outer surface and an interior surface, said acetabular component formed of zirconium, hafnium, niobium, tantalum or alloys thereof;
- b) a polymeric, bio-compatible material lining the interior surface;
- and
- c) a femoral head component, the femoral head component being rotatably secured in said polymeric, bio-compatible material, said femoral head component formed of zirconium, hafnium, niobium, tantalum or alloys thereof;
- d) a first diffusion-hardened coating on at least a part of the outer surface of the femoral head component;
- and
- e) a second diffusion-hardened coating on at least a part of said femoral head component.
4 more elements
A prosthetic device, comprising:
- (a) a first component being sized and shaped to engage or cooperate with a cavity of a patient, the first component having a diffusion-hardened coating on at least a part of the outer surface of the first component, the first component formed of zirconium, hafnium, niobium, tantalum or alloys thereof;
- (b) a biocompatible, polymeric liner disposed within said first component;
- and
- (c) a second component having a diffusion-hardened coating on at least a part of the outer surface of the second component, the second component being sized and shaped to engage or cooperate with the interior surface of the polymeric liner, the first component having a diffusion-hardened coating on at least a part of the outer surface, the first component formed of zirconium, hafnium, niobium, tantalum or alloys thereof.
1 more element
Dependencies are inferred from the claim text.