Patent DE536212C successfully refreshed from Google Patents.
Patent US6733532B1 successfully refreshed from Google Patents.
US6733532B1
Expired / Lapsed
US
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Intervertebral disc prosthesis with improved mechanical behavior
Assignee: Stryker Spine SAS
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Filing: 1999-12-09
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Granted: 2004-05-11
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Expires: 2019-12-09
Abstract
Abstract An intervertebral disc prosthesis comprising two plates and a cushion interposed between the plates is contemplated. The cushion includes a compressible body having two ends in contact with the plates. At least one of the ends is freely displaceable relative to the plate in a parallel direction. Thus, the prosthesis imitates and approximates the mechanical properties of a healthy natural intervertebral disc.
Inventors
- 👤 Fabien Gauchet
- 👤 Régis Le Couedic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:38
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4425; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/30721; A61F2/30742; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30133; A61F2002/30316; A61F2002/30329; A61F2002/30448; A61F2002/30474; A61F2002/30518; A61F2002/30528; A61F2002/30535; A61F2002/30563; A61F2002/30576; A61F2002/30578; A61F2002/443; A61F2220/00; A61F2220/0025; A61F2220/005; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0015; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/91
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
83 words
Intervertebral disc prosthesis comprising: two plates having inner faces; and a cushion interposed between the plates, the cushion comprising an elastic body having ends in contact with the inner faces of the plates, wherein at least one of the ends is freely displaceable relative to the associated plate in a direction parallel to the plate, and wherein, prior to loading, the at least one of the ends has a radius of curvature less than that of the inner face of the associated plate.
Claim 2
Dependent Claim
83 words
Intervertebral disc prosthesis comprising: two plates having inner faces; and a cushion interposed between the plates, the cushion comprising an elastic body having ends in contact with the inner faces of the plates, wherein at least one of the ends is freely displaceable relative to the associated plate in a direction parallel to the plate, and wherein, prior to loading, the at least one of the ends has a radius of curvature less than that of the inner face of the associated plate.
Claim 3
Dependent Claim
35 words
Prosthesis according to claim 1 , wherein at least one end of the body is lodged in a recess provided in one of the plates forming a lateral abutment for the at least one end.
Claim 4
Dependent Claim
50 words
Prosthesis according to claim 1 , wherein at least one end has a face having a zone of contact with a face of the associated plate, wherein the zone of contact has a surface area which increases when a stressing of the plate in the direction of the body increases.
Claim 5
Dependent Claim
44 words
Prosthesis according to claim 1 , wherein at least one end has a face in contact with a face of the associated plate and the end face and the plate face are curved in at least one common direction being respectively convex and concave.
Claim 6
Dependent Claim
13 words
Prosthesis according to claim 1 , wherein the body comprises a viscoelastic material.
Claim 7
Dependent Claim
14 words
Prosthesis according to claim 1 , further comprising a fluid interposed between the plates.
Claim 8
Dependent Claim
15 words
Prosthesis according to claim 6 , wherein the fluid is in contact with the plates.
Claim 9
Dependent Claim
16 words
Prosthesis according to claim 7 , wherein the fluid extends about the periphery of the body.
Claim 10
Dependent Claim
49 words
Prosthesis according to claim 8 , further comprising a chamber extending about the periphery of the body and enclosing the fluid, wherein a surface area of a transverse section of the chamber parallel to the plates is substantially invariable when a stress moving the plates toward one another varies.
Claim 11
Dependent Claim
15 words
Prosthesis according to claim 1 , wherein the prosthesis is an intervertebral lumbar disc prosthesis.
Claim 12
Dependent Claim
12 words
Prosthesis according to claim 5 , wherein the viscoelastic material is silicone.
Claim 13
Dependent Claim
75 words
Intervertebral disc prosthesis comprising: two plates; a cushion interposed between the plates, the cushion comprising a compressible body having ends in contact with the plates, wherein at least one of the ends is freely displaceable relative to the associated plate in a direction parallel to the plate; a fluid interposed between the plates, the fluid being in contact with the plates; and a chamber extending about the periphery of the body and enclosing the fluid.
Claim 14
Dependent Claim
75 words
Intervertebral disc prosthesis comprising: two plates; a cushion interposed between the plates, the cushion comprising a compressible body having ends in contact with the plates, wherein at least one of the ends is freely displaceable relative to the associated plate in a direction parallel to the plate; a fluid interposed between the plates, the fluid being in contact with the plates; and a chamber extending about the periphery of the body and enclosing the fluid.
Claim 15
Dependent Claim
35 words
Prosthesis according to claim 12 , wherein at least one end of the body is lodged in a recess provided in one of the plates forming a lateral abutment for the at least one end.
Claim 16
Dependent Claim
50 words
Prosthesis according to claim 12 , wherein at least one end has a face having a zone of contact with a face of the associated plate, wherein the zone of contact has a surface area which increases when a stressing of the plate in the direction of the body increases.
Claim 17
Dependent Claim
44 words
Prosthesis according to claim 12 , wherein at least one end has a face in contact with a face of the associated plate and the end face and the plate face are curved in at least one common direction being respectively convex and concave.
Claim 18
Dependent Claim
13 words
Prosthesis according to claim 12 , wherein the body comprises a viscoelastic material.
Claim 19
Dependent Claim
12 words
Prosthesis according to claim 16 , wherein the viscoelastic material is silicone.
Claim 20
Dependent Claim
16 words
Prosthesis according to claim 12 , wherein the fluid extends about the periphery of the body.
Claim 21
Dependent Claim
34 words
Prosthesis according to claim 18 , wherein a surface area of a transverse section of the chamber parallel to the plates is substantially invariable when a stress moving the plates toward one another varies.
Claim 22
Dependent Claim
15 words
Prosthesis according to claim 12 , wherein the prosthesis is an intervertebral lumbar disc prosthesis.
Claim 23
Dependent Claim
92 words
Intervertebral disc prosthesis comprising: two plates having inner faces; a cushion interposed between the plates; and a chamber extending about the periphery of the cushion; wherein the cushion comprises a compressible body having ends in contact with the inner faces of the plates; at least one of the ends is freely displaceable relative to the associated plate in a direction parallel to the plate; and prior to loading, the at least one of the ends has a radius of curvature less than that of the inner face of the associated contacting plate.
Claim 24
Dependent Claim
92 words
Intervertebral disc prosthesis comprising: two plates having inner faces; a cushion interposed between the plates; and a chamber extending about the periphery of the cushion; wherein the cushion comprises a compressible body having ends in contact with the inner faces of the plates; at least one of the ends is freely displaceable relative to the associated plate in a direction parallel to the plate; and prior to loading, the at least one of the ends has a radius of curvature less than that of the inner face of the associated contacting plate.
Claim 25
Dependent Claim
51 words
The prosthesis according to claim 21 , wherein at least one end has a face having a zone of contact with a face of the associated plate, and the zone of contact has a surface area which increases when a stressing of the plate in the direction of the body increases.
Claim 26
Dependent Claim
14 words
The prosthesis according to claim 21 , further comprising a liquid within the chamber.
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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) | 2007-05-11 | 2007-11-10 | 2008-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-05-11 | 2011-11-10 | 2012-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-05-11 | 2015-11-10 | 2016-05-11 | $7700.00 | Window Closed / Lapsed |