US7182784B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic devices employing oxidized zirconium and other abrasion resistant surfaces contacting surfaces of cross-linked polyethylene
Assignee: Smith and Nephew Inc
•
Filing: 2003-09-18
•
Granted: 2007-02-27
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Expires: 2023-09-18
Abstract
Abstract Orthopedic implants which include the components of zirconium or zirconium-based alloys having surfaces coated with oxidized zirconium or alternatively, other orthopedic implants comprising abrasion resistant surfaces contacting surfaces of cross-linked polyethylene are disclosed. Such implants provide low friction, highly wear resistant coatings especially useful in artificial joints, such as hip joints, knee joints, elbows, etc., but also useful in other implant devices as well. The implants also find use as vertebral disc prostheses.
Inventors
- 👤 David L. Evans
- 👤 Gordon Hunter
- 👤 Shilesh C. Jani
- 👤 Robert E. Brosnahan, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4425; A61L27/14; A61L27/16; A61L31/00; A61L31/04; A61L31/048; A61L31/08; A61L31/082; A61L31/088; A61F2/30767; A61F2002/30769; A61F2/30771; A61F2002/30841; A61F2/30907; A61F2002/30909; A61F2002/443; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029; A61F2310/00035; A61F2310/00089; A61F2310/00389; A61F2310/00395; A61F2310/00419; A61F2310/00485; A61F2310/00592; A61F2310/00598; A61F2310/00634; A61L2430/00; A61L2430/38; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L2312/00; C08L2312/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A vertebral disc prosthesis for implantation in a patient, said prosthesis comprising at least one surface of cross-linked polyethylene; and, at least one component formed of zirconium or zirconium alloy and having at least one surface of diffusion-bonded blue-black or black oxidized zirconium, wherein said at least one surface of cross-linked polyethylene articulates against said at least one surface of diffusion-bonded blue-black or black oxidized zirconium.
Claim 2
Dependent Claim
66 words
A vertebral disc prosthesis for implantation in a patient, said prosthesis comprising at least one surface of cross-linked polyethylene; and, at least one component formed of zirconium or zirconium alloy and having at least one surface of diffusion-bonded blue-black or black oxidized zirconium, wherein said at least one surface of cross-linked polyethylene articulates against said at least one surface of diffusion-bonded blue-black or black oxidized zirconium.
Claim 3
Dependent Claim
37 words
The vertebral disc prosthesis of claim 1 further comprising: two prosthesis plates; and, a prosthesis core said prosthesis core articulating against at least one of said two prosthesis plates permitting a rotational movement around a vertical axis.
Claim 4
Dependent Claim
25 words
The vertebral disc prosthesis of claim 1 wherein said surface of diffusion-bonded blue-black or black oxidized zirconium is from about 1 to 20 microns thick.
Claim 5
Dependent Claim
25 words
The vertebral disc prosthesis of claim 1 wherein said surface of diffusion-bonded blue-black or black oxidized zirconium is from about 1 to 5 microns thick.
Claim 6
Dependent Claim
32 words
The vertebral disc prosthesis of claim 1 wherein said at least one component comprises an irregular surface structure adapted to accommodate tissue in-growth on a portion of said at least one component.
Claim 7
Dependent Claim
45 words
The vertebral disc prosthesis of claim 5 wherein the irregular surface structure comprises beads attached to the outer surface of said at least one component, wherein at least a portion of the surface of the beads is oxidized to diffusion-bonded blue-black or black oxidized zirconium.
Claim 8
Dependent Claim
46 words
The vertebral disc prosthesis of claim 5 wherein the irregular surface structure comprises wire mesh connected to the outer surface of said at least one component, wherein at least a portion of the surface of the mesh is oxidized to diffusion-bonded blue-black or black oxidized zirconium.
Claim 9
Dependent Claim
16 words
The vertebral disc prosthesis of claim 5 wherein the irregular surface structure comprises a textured surface.
Claim 10
Dependent Claim
17 words
The vertebral disc prosthesis of claim 5 wherein the irregular surface structure comprises anchoring projections or teeth.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2010-02-26 | 2010-08-28 | 2011-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-02-26 | 2014-08-28 | 2015-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-02-26 | 2018-08-28 | 2019-02-27 | $7700.00 | Window Closed / Lapsed |