Intervertebral disk prosthesis
First Claim
Patent Images
1. Intervertebral disc prosthesis, comprising:
- tow plates; and
a cushion interposed between the plates, the cushion comprising a compressible body including a compressible fluid, wherein the fluid extends around the periphery of the body.
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Accused Products
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.
910 Citations
21 Claims
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1. Intervertebral disc prosthesis, comprising:
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tow plates; and
a cushion interposed between the plates, the cushion comprising a compressible body including a compressible fluid, wherein the fluid extends around the periphery of the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Intervertebral disc prosthesis, comprising:
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two plates; and
a cushion interposed between the plates, the cushion comprising a compressible body and including a compressible fluid, wherein the fluid has a pressure such that the fluid is more compressible than the body.
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10. Intervertebral disc prosthesis, comprising:
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two plates; and
a cushion interposed between the plates, the cushion comprising a compressible body made from a viscoelastic material and including a compressible fluid. - View Dependent Claims (11)
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12. Intervertebral disc prosthesis, comprising:
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two plates; and
a cushion interposed between the plates, wherein the cushion comprises a compressible body and includes a compressible fluid, and wherein the body has at least one end defining a contact zone with one of the plates and the prosthesis is arranged such that the contact zone has a surface area which increases whenever a stressing of the plates in the direction of the body is increased. - View Dependent Claims (13, 14, 15)
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16. Intervertebral disc prosthesis, comprising:
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two plates; and
a cushion interposed between the plates, wherein the cushion comprises a compressible body and includes a compressible fluid, and wherein the body has at least one end in contact with one of the plates, the at least one end being free to move relative to the plate in a direction parallel to the plate. - View Dependent Claims (17)
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18. Intervertebral disc prosthesis, comprising:
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two plates; and
a cushion interposed between the plates, wherein the cushion comprises a compressible chamber containing a compressible fluid such that the chamber has a cross-sectional area parallel to the plates which is essentially invariable when variation occurs in a compression of the cushion between the plates. - View Dependent Claims (20, 21)
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19. Intervertebral disc prosthesis, comprising:
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two plates; and
a cushion interposed between the plates, wherein the cushion comprises a compressible chamber containing a compressible fluid and extending around the periphery of the body and a distance from the body.
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Specification