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US 2006/0041314 A1Published application
Artificial disc prosthesis
OwnerThierry Millardinventor
Life of this patent
Estimating the term…
Abstract
An intervertebral disc having a first end plate, a second end plate and a core. The first end plate including a top surface and a bottom spherical surface. The second end plate having a lower surface and an upper surface, the upper surface including at least one protrusion having a length and a width extending upward from said upper surface. The core having a concave surface and a second surface. The core adapted for being disposed between the first end plate and the second end plate.
Claims20
An intervertebral disc comprising:
- a first end plate having a first surface for engaging a vertebral body and an oppositely-facing second surface remote from said first surface, said second surface having an articulation portion, said articulation portion having a first position defining a maximum articulation angle;
- a second end plate having a first surface for engaging a vertebral body and an oppositely-facing second surface remote from said first surface;
- a core having an articulation surface and an oppositely-facing translation surface, said core being positioned between said first end plate and said second end plate such that said articulation portion of said second surface is positioned adjacent said articulation surface of said core for articulation therebetween, said translation surface of said core confronting said second surface of said second end plate;
- and
- wherein said articulation portion is adapted to reach said first position in response to a force in a first direction, and said core is adapted to translate along said second surface of said second end plate in response to a force in a first direction after said articulation portion reaches said first position.
2 more elements
An intervertebral disc comprising:
- a first end plate having a first surface for engaging a vertebral body and an oppositely-facing second surface remote from said first surface, said second surface having an articulation portion;
- a second end plate having a first surface for engaging a vertebral body and an oppositely-facing second surface remote from said first surface, said second surface having at least one protrusion extending outwardly therefrom, said protrusion having a height, a width and a length, each having a first dimension;
- and
- a core having an articulation surface and an oppositely-facing translation surface, said translation surface including at least one indent having a height, a length and a width, each having a second dimension, said height dimension of said indent being greater than said height dimension of said protrusion and at least one of said length dimension or said width dimension of said protrusion being greater than said height dimension or said width dimension of said protrusion respectively, said core being positioned between said first end plate and said second end plate such that said articulation surface of said core confronts said second surface of said first end plate and said translation surface of said core confronts said second surface of said second end plate, said core capable of articulating relative to said first end plate and translating relative to said second end plate, said at least one protrusion of said second surface being disposed within said at least one indent of said translation surface, wherein said protrusion limits translation of said core across said second end plate.
1 more element
An intervertebral disc comprising:
- a first end plate having a vertebral body contacting surface and an articulation surface spaced therefrom;
- a core element having an articulation surface for articulation with said articulation surface of said first end plate, said core element having a translation surface spaced from said articulation surface, said translation surface having a stop element formed therein;
- and
- a second end plate having a vertebral body contacting surface and a translation surface spaced therefrom, said translation surface slidably engaging said core translation surface, said end plate translation surface including a stop element engagable with said core stop element to limit the relative translation between said core element and said second end plate.
1 more element
An intervertebral disc comprising:
- a first portion having a first surface for engaging a vertebral body and an oppositely-facing second surface remote from said first surface,
- a second portion having a first surface for engaging a vertebral body and an oppositely-facing second surface remote from said first surface, said first surface having a stop element disposed thereon;
- and
- a core element having an articulation surface and a translation surface, said translation surface having a stop element engagable with said stop element of said second portion, said translation surface slidably engaging said first surface of said second portion as said core stop element engages said second portion stop element.
1 more element
Dependencies are inferred from the claim text.