Patent EP0174843A2 successfully refreshed from Google Patents.
Patent US5676701A successfully refreshed from Google Patents.
US5676701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low wear artificial spinal disc
Assignee: Howmedica Osteonics Corp
•
Filing: 1995-06-07
•
Granted: 1997-10-14
•
Expires: 2015-06-07
Abstract
Abstract An artificial spinal disc for surgical placement between adjacent vertebrae including a first component for attaching to a first vertebrae, the first component having a concave recess, with the concave contoured surface having a circumference of 360°. A second component for attaching to a second vertebrae, the second component including a projection with a convex surface, the convex contoured surface having a circumference of 360°. The corresponding contoured surfaces shaped to allow an unrestricted rotational and a flexion/extension bending motion between the first and second components relative to a patient's normal spinal axis when in a standing position with the spine in a straightened position.
Inventors
- 👤 Hansen A. Yuan
- 👤 Chih-I Lin
- 👤 James A. Davidson
- 👤 Laura C. Small
- 👤 Thomas A. Carls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:32
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4425; A61L; A61L27/00; A61L27/02; A61L27/04; A61L27/045; A61F2/30767; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30016; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30133; A61F2002/30316; A61F2002/30329; A61F2002/30383; A61F2002/3039; A61F2002/30398; A61F2002/30621; A61F2002/30649; A61F2/30771; A61F2002/30841; A61F2002/30878; A61F2002/30891; A61F2002/30892; A61F2002/30922; A61F2002/443; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0015; A61F2250/00; A61F2250/0014; A61F2250/0019; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00035; A61F2310/00089; A61F2310/00179; A61F2310/00293; A61F2310/00389; A61F2310/00395; A61F2310/00419; A61F2310/00449; Y; Y10; Y10S; Y10S606/00; Y10S606/907
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
An artificial spinal disc for surgical placement between first and second adjacent vertebrae of a patient's spine, comprising: (a) a first component for attaching to the first vertebrae, said first component including a concave recess, the concave recess having a contoured surface with a circumference of 360°; (b) a second component for attaching to the second vertebrae, said second component including a projection that fits the concave recess of the first component, said projection having a convex contoured surface with a circumference of 360°; (c) the corresponding contoured surfaces being configured so as to allow an unrestricted rotational and a flexion/extension bending motion between the first and second components relative to a patient's normal spinal axis when in a standing position with the spine in a straightened position, said corresponding contoured surfaces allowing for a flexion/extension angle of about between 20° to 30°.
Claim 2
Dependent Claim
143 words
An artificial spinal disc for surgical placement between first and second adjacent vertebrae of a patient's spine, comprising: (a) a first component for attaching to the first vertebrae, said first component including a concave recess, the concave recess having a contoured surface with a circumference of 360°; (b) a second component for attaching to the second vertebrae, said second component including a projection that fits the concave recess of the first component, said projection having a convex contoured surface with a circumference of 360°; (c) the corresponding contoured surfaces being configured so as to allow an unrestricted rotational and a flexion/extension bending motion between the first and second components relative to a patient's normal spinal axis when in a standing position with the spine in a straightened position, said corresponding contoured surfaces allowing for a flexion/extension angle of about between 20° to 30°.
Claim 3
Dependent Claim
33 words
The artificial spinal disc of claim 1, wherein the contoured surface of at least one component is formed from a chromium-containing metal having a chromium content in excess of about 15 weight percent.
Claim 4
Dependent Claim
19 words
The artificial spinal disc of claim 1, wherein at least one contoured surface is formed from a cobalt-chromium-molybdenum alloy.
Claim 5
Dependent Claim
17 words
The artificial spinal disc of claim 1, wherein both contoured surfaces are formed from a cobalt-chromium-molybdenum alloy.
Claim 6
Dependent Claim
25 words
The artificial spinal disc of claim 1, wherein the first and second component include anchoring means for attachment to the respective first and second vertebrae.
Claim 7
Dependent Claim
22 words
The artificial spinal disc of claim 5, wherein the anchoring means is selected from the group consisting of pegs, posts and screws.
Claim 8
Dependent Claim
30 words
The artificial spinal disc of claim 5, wherein the anchoring means includes a surface selected from the group consisting of a porous-coated and a macro-textured surface to facilitate bone ingrowth.
Claim 9
Dependent Claim
28 words
An artificial spinal disc of claim 1, wherein the components are generally oval in shape with the contoured surfaces being positioned approximately in the center of the component.
Claim 10
Dependent Claim
35 words
An artificial spinal disc of claim 1, wherein the first and second components are configured so as to allow the artificial spinal disc to be implanted as one unit in which over distraction is eliminated.
Claim 11
Dependent Claim
196 words
An artificial spinal disc for surgical placement between first and second adjacent vertebrae of a patient's spine, comprising: (a) a first component for attaching to the first vertebrae, said first component including a concave recess, the concave recess having a contoured surface with a circumference of 360°; (b) a second component for attaching to the second vertebrae, said second component including a projection that fits the concave recess of the first component, said projection having a convex contoured surface with a circumference of 360°; (c) the corresponding contoured surfaces being configured so as to allow an unrestricted rotational and a flexion/extension bending motion between the first and second components relative to a patient's normal spinal axis when in a standing position with the spine in a straightened position, said corresponding contoured surfaces allowing for a flexion/extension angle of about between 20° to 30°; (d) wherein the first and second components are configured so as to allow the artificial spinal disc to be implanted as one unit in which openings in bone of the adjacent vertebrae are created in order to allow the artificial spinal disc to be slid into place so as to prevent over distraction.
Claim 12
Dependent Claim
196 words
An artificial spinal disc for surgical placement between first and second adjacent vertebrae of a patient's spine, comprising: (a) a first component for attaching to the first vertebrae, said first component including a concave recess, the concave recess having a contoured surface with a circumference of 360°; (b) a second component for attaching to the second vertebrae, said second component including a projection that fits the concave recess of the first component, said projection having a convex contoured surface with a circumference of 360°; (c) the corresponding contoured surfaces being configured so as to allow an unrestricted rotational and a flexion/extension bending motion between the first and second components relative to a patient's normal spinal axis when in a standing position with the spine in a straightened position, said corresponding contoured surfaces allowing for a flexion/extension angle of about between 20° to 30°; (d) wherein the first and second components are configured so as to allow the artificial spinal disc to be implanted as one unit in which openings in bone of the adjacent vertebrae are created in order to allow the artificial spinal disc to be slid into place so as to prevent over distraction.
References Cited (Backward Citations)
DE2263842A1
Cited
DE3023353A1
Cited
EP0042271A1
Cited
US4349921A
Cited
US4759766A
Cited
EP0176728B1
Cited
US5258043A
Cited
US4997432A
Cited
FR2632516A1
Cited
US5306308A
Cited
WO1991013598A1
Cited
US5314477A
Cited
US5306307A
Cited
WO1993010725A2
Cited
US5258031A
Cited
US5425773A
Cited
US5415704A
Cited
US5401269A
Cited
US5306309A
Cited
FR2694882A1
Cited
US5308412A
Cited
FR2718635A1
Cited
EP0699426B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-13 | 2001-04-14 | 2001-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-13 | 2005-04-14 | 2005-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-13 | 2009-04-14 | 2009-10-14 | $7700.00 | Window Closed / Lapsed |