US7001432B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intervertebral prosthesis
Assignee: Cervitech Inc
•
Filing: 2003-01-13
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Granted: 2006-02-21
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Expires: 2023-01-13
Abstract
Abstract An intervertebral prosthesis, in particular for the cervical spine, includes a first cover plate to be connected to a first vertebral body, a second cover plate to be connected to the second vertebral body, and a prosthesis core which forms an articulation with the second cover plate. The prosthesis core is held by a seat of the first cover plate which is designed as a guide device. The core can be pushed into the guide device from the ventral side in the anterior-posterior (AP) direction relative to the first cover plate. A limit-stop plate is provided on the ventral edge of the first cover plate. This limit-stop plate is displaceable in a slide guide between a locking position and a nonlocking position.
Inventors
- 👤 Arnold Keller
- 👤 Paul C. McAfee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4425; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30383; A61F2002/30387; A61F2002/3039; A61F2002/30392; A61F2002/30397; A61F2002/30398; A61F2002/304; A61F2002/30476; A61F2002/30517; A61F2002/30535; A61F2002/30576; A61F2002/30578; A61F2002/30604; A61F2002/30616; A61F2002/30621; A61F2002/30649; A61F2002/3065; A61F2002/443; A61F2220/00; A61F2220/0025; A61F2310/00; A61F2310/00005; A61F2310/00011
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
174 words
An intervertebral prosthesis, comprising a first cover plate configured to be connected to a first vertebral body, a second cover plate configured to be connected to a second vertebral body, and a prosthesis core which forms an articulation with the second cover plate and is held by a seat of the first cover plate, which seat is designed as a guide device into which the core can be moved from a ventral side relative to the first cover plate, the first cover plate having, on a ventral edge, a slide guide with respect to which a limit stop on the first cover plate is displaceable between a locking position and a nonlocking position and has a height such that the limit stop does not interfere with relative motion between the prosthesis core and the second cover plate, wherein the slide guide is formed by a guide slot which extends transverse to the guide device and which is configured to receive the limit stop and wherein the limit stop is designed as a limit-stop plate.
Claim 2
Dependent Claim
174 words
An intervertebral prosthesis, comprising a first cover plate configured to be connected to a first vertebral body, a second cover plate configured to be connected to a second vertebral body, and a prosthesis core which forms an articulation with the second cover plate and is held by a seat of the first cover plate, which seat is designed as a guide device into which the core can be moved from a ventral side relative to the first cover plate, the first cover plate having, on a ventral edge, a slide guide with respect to which a limit stop on the first cover plate is displaceable between a locking position and a nonlocking position and has a height such that the limit stop does not interfere with relative motion between the prosthesis core and the second cover plate, wherein the slide guide is formed by a guide slot which extends transverse to the guide device and which is configured to receive the limit stop and wherein the limit stop is designed as a limit-stop plate.
Claim 3
Dependent Claim
65 words
The prosthesis as claimed in claim 1 , wherein the guide slot has a guide direction (D) extending transverse to a plane of extension of the first cover plate and the limit-stop plate, which is configured to be movable in guide direction (D) is, in its locking position, partially held in the slot and partially extends above a bottom surface of the first cover plate.
Claim 4
Dependent Claim
30 words
The prosthesis as claimed in claim 2 , wherein the guide slot is provided in the ventral edge of the first cover plate and in a securing flange arranged thereon.
Claim 5
Dependent Claim
48 words
The prosthesis as claimed in claim 2 , wherein the guide slot has at least one first screw hole passing through it, and the limit-stop plate has a second screw hole which is flush with the first screw hole when the limit-stop plate is in its locking position.
Claim 6
Dependent Claim
26 words
The prosthesis as claimed in claim 4 , wherein the limit-stop plate comprises a bendable fastening lug projecting in the guide direction of the guide slot.
Claim 7
Dependent Claim
24 words
The prosthesis as claimed in claim 2 , wherein the prosthesis core has an articulation surface that covers substantially the entire first cover plate.
Claim 8
Dependent Claim
24 words
The prosthesis as claimed in claim 4 , wherein the prosthesis core has an articulation surface that covers substantially the entire first cover plate.
Claim 9
Dependent Claim
29 words
The prosthesis as claimed in claim 2 , wherein the prosthesis core has a slot which is flush with the guide slot and receives part of the limit-stop plate.
Claim 10
Dependent Claim
26 words
The prosthesis as claimed in claim 8 , wherein the limit-stop plate comprises a bendable fastening lug projecting in the guide direction of the guide slot.
Claim 11
Dependent Claim
24 words
The prosthesis as claimed in claim 8 , wherein the prosthesis core has an articulation surface that covers substantially the entire first cover plate.
Claim 12
Dependent Claim
26 words
The prosthesis as claimed in claim 2 , wherein the limit-stop plate comprises a bendable fastening lug projecting in the guide direction of the guide slot.
Claim 13
Dependent Claim
50 words
The prosthesis as claimed in claim 1 , wherein the guide slot has a guide direction (E) extending parallel to a plane of extension of the first cover plate and transverse to an anterior-posterior direction, and the limit-stop plate can be moved in the anterior-posterior direction into the locking position.
Claim 14
Dependent Claim
41 words
The prosthesis as claimed in claim 12 , wherein the prosthesis core comprises a part which covers the limit-stop plate held in the guide slot and which prevents the limit-stop plate from leaving the guide slot transverse to guide direction (E).
Claim 15
Dependent Claim
29 words
The prosthesis as claimed in claim 13 , wherein the prosthesis core has a slot which is flush with the guide slot and receives part of the limit-stop plate.
Claim 16
Dependent Claim
48 words
The prosthesis as claimed in claim 12 , wherein the guide slot has at least one first screw hole passing through it, and the limit-stop plate has a second screw hole which is flush with the first screw hole when the limit-stop plate is in its locking position.
Claim 17
Dependent Claim
26 words
The prosthesis as claimed in claim 12 , wherein the limit-stop plate comprises a bendable fastening lug projecting in the guide direction of the guide slot.
Claim 18
Dependent Claim
24 words
The prosthesis as claimed in claim 12 , wherein the prosthesis core has an articulation surface that covers substantially the entire first cover plate.
Claim 19
Dependent Claim
26 words
The prosthesis as claimed in claim 1 , wherein the limit-stop plate comprises a bendable fastening lug projecting in the guide direction of the guide slot.
Claim 20
Dependent Claim
24 words
The prosthesis as claimed in claim 18 , wherein the prosthesis core has an articulation surface that covers substantially the entire first cover plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-02-20 | 2009-08-22 | 2010-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-02-20 | 2013-08-22 | 2014-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-02-20 | 2017-08-22 | 2018-02-21 | $7700.00 | Window Closed / Lapsed |