Intervertebral disc having translation
First Claim
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1. An intervertebral motion disc comprising a) a prosthetic vertebral endplate comprising:
- i) an outer surface adapted to mate with a vertebral body,ii) an inner surface having a first opening thereon,iii) a body portion connecting the inner and outer surfaces and defining a first sidewall comprising a second opening thereon, andiv) an articulation surface suitable for supporting articulation motion,wherein the first and second openings communicate to form a channel having a first open end, andb) a tab shaped for insertion into the channel, wherein the tab is disposed within the channel and comprises a body portion and deformable arms extending from the body portion,wherein each deformable arm comprises a wing extending therefrom,wherein the body portion of the endplate further comprises second and third sidewalls defining a first width and the wings define a wingspan, and wherein the wingspan exceeds the first width of the channel, andwherein each of the second and third sidewall of the endplate further comprises a socket extending therein, thereby defining opposing sockets, andwherein the wings are shaped to be received within the opposing sockets.
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Abstract
This invention relates to an intervertebral motion disc having two motion surfaces and an open channel.
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Citations
46 Claims
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1. An intervertebral motion disc comprising a) a prosthetic vertebral endplate comprising:
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i) an outer surface adapted to mate with a vertebral body, ii) an inner surface having a first opening thereon, iii) a body portion connecting the inner and outer surfaces and defining a first sidewall comprising a second opening thereon, and iv) an articulation surface suitable for supporting articulation motion, wherein the first and second openings communicate to form a channel having a first open end, and b) a tab shaped for insertion into the channel, wherein the tab is disposed within the channel and comprises a body portion and deformable arms extending from the body portion, wherein each deformable arm comprises a wing extending therefrom, wherein the body portion of the endplate further comprises second and third sidewalls defining a first width and the wings define a wingspan, and wherein the wingspan exceeds the first width of the channel, and wherein each of the second and third sidewall of the endplate further comprises a socket extending therein, thereby defining opposing sockets, and wherein the wings are shaped to be received within the opposing sockets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An intervertebral motion disc comprising:
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a) a prosthetic vertebral endplate comprising; i) an outer surface adapted to mate with a vertebral body, ii) an inner surface having a first opening thereon, iii) a body portion connecting the inner and outer surfaces and defining a sidewall comprising a second opening thereon, and iv) a first articulation surface suitable for supporting articulation motion, wherein the first and second openings communicate to form a channel having a first open end, and b) a core member having a first articulation surface suitable for supporting articulation motion, wherein the core member is disposed within the channel and oriented therein to produce a first articulation interface between the first articulation surface of the first endplate and the first articulation surface of the core member, and c) means for retaining the core member within the channel, wherein the means for retaining the core member within the channel comprises a tab shaped for insertion into the channel, wherein the tab is disposed within the channel, wherein the tab comprises a body portion and deformable arms extending from the body portion, wherein each deformable arm comprises a wing extending therefrom, wherein the body portion of the endplate further comprises second and third sidewalls defining a first width and the wings define a wingspan, and wherein the wingspan exceeds the first width of the channel, and wherein each of the second and third sidewall of the endplate further comprises a socket extending therein, thereby defining opposing sockets, and wherein the wings are shaped to be received within the opposing sockets. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An intervertebral motion disc comprising:
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a) a first prosthetic vertebral endplate comprising; i) an outer surface adapted to be attached to a first vertebral body, ii) an inner surface comprising an inner portion and a peripheral portion, wherein at least one of the portions comprises a first articulation surface, and b) a second prosthetic vertebral endplate comprising; i) an outer surface adapted to be attached to a second vertebral body, ii) an inner surface comprising an inner portion and a peripheral portion, wherein at least one of the portions comprises a first articulation surface, and c) a core member comprising; i) a first articulation surface adapted for articulation with the first articulation surface of the first endplate, and ii) a second articulation surface adapted for articulation with the first articulation surface of the second endplate, d) means for limiting the translation motion of the core member, wherein the core member is disposed between the endplates and oriented therein to produce a first articulation interface between the first articulation surface of the first endplate and the first articulation surface of the core member, and a second articulation interface between the first articulation surface of the second endplate and the second articulation surface of the core member, and a distance between the peripheral portions of the first and second endplates, and wherein the distance between the peripheral portions is greater than the height of the core member, wherein the means for limiting the translation motion of the core member comprises a tab shaped for insertion into the channel, wherein the tab is disposed within the channel, wherein the tab comprises a body portion and deformable arms extending from the body portion, wherein each deformable arm comprises a wing extending therefrom, wherein the body portion of the endplate further comprises second and third sidewalls defining a first width and the wings define a wingspan, and wherein the wingspan exceeds the first width of the channel, and wherein each of the second and third sidewall of the endplate further comprises a socket extending therein, thereby defining opposing sockets, and wherein the wings are shaped to be received within the opposing sockets.
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40. An intervertebral motion disc comprising:
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a) a first prosthetic vertebral endplate comprising; i) an outer surface adapted to be attached to a first vertebral body, and ii) an inner surface comprising a first articulation surface, b) a second prosthetic vertebral endplate comprising; i) an outer surface adapted to mate with a second vertebral body, and ii) an inner surface having a first articulation surface, c) a core member comprising; i) a first articulation surface adapted for articulation with the first articulation surface of the first endplate, and ii) a second articulation surface adapted for articulation with the first articulation surface of the second endplate, d) means for limiting a motion of the core member, wherein the core member is disposed between the endplates and oriented therein to produce a first articulation interface between the first articulation surface of the first endplate and the first articulation surface of the core member, and a second articulation interface between the first articulation surface of the second endplate and the second articulation surface of the core member, wherein the first articulation interface has a range of anterior-posterior A-P motion and a range of medial-lateral M-L motion, wherein the range of A-P motion is between 1.5 and 50 times greater than the range of M-L motion, wherein the means for limiting the translation motion of the core member comprises a tab shaped for insertion into the channel, wherein the tab is disposed within the channel, wherein the tab comprises a body portion and deformable arms extending from the body portion, wherein each deformable arm comprises a wing extending therefrom, wherein the body portion of the endplate further comprises second and third sidewalls defining a first width and the wings define a wingspan, and wherein the wingspan exceeds the first width of the channel, and wherein each of the second and third sidewall of the endplate further comprises a socket extending therein, thereby defining opposing sockets, and wherein the wings are shaped to be received within the opposing sockets. - View Dependent Claims (41, 42, 43, 44, 45, 46)
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Specification