Patent US20040176845A1 successfully refreshed from Google Patents.
US20040176845A1
Expired / Lapsed
US
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Cervical disc replacement
Assignee: Howmedica Osteonics Corp
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Filing: 2004-02-11
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Granted: —
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Expires: 2024-02-11
Abstract
Abstract An apparatus for replacing at least a portion of an intervertebral disc in a spinal column includes: a first member having a first vertebral contact surface for engagement with an endplate of a first vertebral bone in the spinal column, and having a first articulation surface; and a second member having a second vertebral contact surface for engagement with an endplate of a second vertebral bone in the spinal column, and having a second articulation surface, wherein: an intervertebral disc space is defined substantially between the first and second endplates of the first and second vertebral bones, and at least one of the first and second articulation surfaces is a saddle shaped surface, and the articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending.
Inventors
- 👤 Rafail Zubok
- 👤 Antonio Valdevit
- 👤 Michael Dudasik
- 👤 Joseph Errico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
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; A61B17/70; A61B17/7059; A61B17/80; A61B17/8033; A61B17/8042; A61B17/84; A61B17/86; A61B17/8625; A61F2/46; A61F2/4603; A61F2/4611; A61F2/4684; A61B17/16; A61B17/17; A61B17/1728; A61B17/866; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30301; A61F2002/30316; A61F2002/30535; A61F2002/30576; A61F2002/30578; A61F2002/30604; A61F2002/30616; A61F2002/30621; A61F2002/30649; A61F2002/3065; A61F2/30767; A61F2/30771; A61F2002/30841; A61F2002/30843; A61F2002/449; A61F2002/4625; A61F2002/4627; A61F2002/4628; A61F2002/4629; A61F2230/00; A61F2230/0063; A61F2230/0065; A61F2230/0095; Y; Y10; Y10S; Y10S623/00; Y10S623/902; Y10S623/908; Y10S623/909; Y10S623/911
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
160 words
1 . An apparatus for replacing at least a portion of an intervertebral disc in a spinal column, comprising: a first member having a first vertebral contact surface for engagement with an endplate of a first vertebral bone in the spinal column, and having a first articulation surface; and a second member having a second vertebral contact surface for engagement with an endplate of a second vertebral bone in the spinal column, and having a second articulation surface, wherein: an intervertebral disc space is defined substantially between the first and second endplates of the first and second vertebral bones, and at least one of the first and second articulation surfaces is a saddle shaped surface, and the articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending.
Claim 2
Dependent Claim
160 words
1 . An apparatus for replacing at least a portion of an intervertebral disc in a spinal column, comprising: a first member having a first vertebral contact surface for engagement with an endplate of a first vertebral bone in the spinal column, and having a first articulation surface; and a second member having a second vertebral contact surface for engagement with an endplate of a second vertebral bone in the spinal column, and having a second articulation surface, wherein: an intervertebral disc space is defined substantially between the first and second endplates of the first and second vertebral bones, and at least one of the first and second articulation surfaces is a saddle shaped surface, and the articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending.
Claim 3
Dependent Claim
19 words
2 . The apparatus of claim 1 , wherein both the first and second articulation surfaces are saddle shaped.
Claim 4
Dependent Claim
71 words
3 . The apparatus of claim 1 , wherein the first articulation surface is saddle shaped and the second articulation surface is defined by at least one bearing surface for engaging respective portions of the first articulation surface when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending.
Claim 5
Dependent Claim
72 words
4 . The apparatus of claim 1 , wherein the at least one saddle shaped articulation surface is defined by at least one bearing surface that in the aggregate cooperates to engage respective portions of the other articulation surface when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending.
Claim 6
Dependent Claim
22 words
5 . The apparatus of claim 4 , wherein the at least one bearing surface defines a contiguous saddle shaped articulation surface.
Claim 7
Dependent Claim
123 words
6 . The apparatus of claim 1 , wherein the at least one saddle shaped articulation surface is one of: defined at least by a concave arc having a radius of curvature A about a first axis substantially perpendicular to an anterior-posterior plane of the spinal column, and a convex arc having a radius of curvature B about a first axis substantially perpendicular to a lateral plane of the spinal column; and defined at least by a convex arc having a radius of curvature C about a second axis substantially perpendicular to the anterior-posterior plane of the spinal column, and a concave arc having a radius of curvature D about a second axis substantially perpendicular to the lateral plane of the spinal column.
Claim 8
Dependent Claim
58 words
7 . The apparatus of claim 1 , wherein the first and second articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to at least axially rotate relative to one another through a range of angles.
Claim 9
Dependent Claim
69 words
8 . The apparatus of claim 1 , wherein the first and second articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to axially rotate relative to one another through a range of angles without substantially displacing the first and second vertebral bones away from one another.
Claim 10
Dependent Claim
42 words
9 . The apparatus of claim 8 , wherein the first and second articulation surfaces are sized and shaped such that the first and second vertebral bones are substantially displaced away from one another at axial rotations outside the range of angles.
Claim 11
Dependent Claim
177 words
10 . An apparatus for replacing at least a portion of an intervertebral disc in a spinal column, comprising: a first member having a first vertebral contact surface for engagement with an endplate of a first vertebral bone in the spinal column, and having a first articulation surface; and a second member having a second vertebral contact surface for engagement with an endplate of a second vertebral bone in the spinal column, and having a second articulation surface, wherein: an intervertebral disc space is defined substantially between the first and second endplates of the first and second vertebral bones, and at least one of the first and second articulation surfaces is defined by at least one bearing surface that in the aggregate cooperates to define a saddle shaped surface, and the first and second articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending.
Claim 12
Dependent Claim
177 words
10 . An apparatus for replacing at least a portion of an intervertebral disc in a spinal column, comprising: a first member having a first vertebral contact surface for engagement with an endplate of a first vertebral bone in the spinal column, and having a first articulation surface; and a second member having a second vertebral contact surface for engagement with an endplate of a second vertebral bone in the spinal column, and having a second articulation surface, wherein: an intervertebral disc space is defined substantially between the first and second endplates of the first and second vertebral bones, and at least one of the first and second articulation surfaces is defined by at least one bearing surface that in the aggregate cooperates to define a saddle shaped surface, and the first and second articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending.
Claim 13
Dependent Claim
31 words
11 . The apparatus of claim 10 , wherein each of the first and second articulation surfaces include at least one bearing surface that in the aggregate defines a saddle shape.
Claim 14
Dependent Claim
78 words
12 . The apparatus of claim 10 , wherein the first articulation surface includes at least one bearing surface defining the saddle shape and the second articulation surface is defined by at least one bearing surface for engaging respective portions of the first articulation surface when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to articulate in at least one of flexion, extension, and lateral bending
Claim 15
Dependent Claim
22 words
13 . The apparatus of claim 10 , wherein the at least one bearing surface defines a contiguous saddle shaped articulation surface.
Claim 16
Dependent Claim
125 words
14 . The apparatus of claim 10 , wherein the at least one saddle shaped articulation surface is one of: defined at least by a concave arc having a radius of curvature A about a first axis substantially perpendicular to an anterior-posterior plane of the spinal column, and by a convex arc having a radius of curvature B about a first axis substantially perpendicular to a lateral plane of the spinal column; and defined at least by a convex arc having a radius of curvature C about a second axis substantially perpendicular to the anterior-posterior plane of the spinal column, and by a concave arc having a radius of curvature D about a second axis substantially perpendicular to the lateral plane of the spinal column.
Claim 17
Dependent Claim
58 words
15 . The apparatus of claim 10 , wherein the first and second articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to at least axially rotate relative to one another through a range of angles.
Claim 18
Dependent Claim
69 words
16 . The apparatus of claim 10 , wherein the first and second articulation surfaces are sized and shaped to engage one another when the first and second members are disposed in the intervertebral disc space to enable the first and second vertebral bones to axially rotate relative to one another through a range of angles without substantially displacing the first and second vertebral bones away from one another.
Claim 19
Dependent Claim
41 words
17 . The apparatus of claim 16 , wherein the first and second articulation surfaces are sized and shaped such that the first and second vertebral bones are displaced away from one another at axial rotations outside the range of angles.
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