Intervertebral disk prosthesis
AssigneeDIMSO (Distribution Medicale du Sud-Quest)
InventorsFabien Gauchet, Régis Le Couedic
Life of this patent
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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.
Claims21
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.
Intervertebral disc prosthesis, comprising:
- 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.
Intervertebral disc prosthesis, comprising:
- 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.
Intervertebral disc prosthesis, comprising:
- 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.
Intervertebral disc prosthesis, comprising:
- 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.
Intervertebral disc prosthesis, comprising:
- 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.
Intervertebral disc prosthesis, comprising:
- 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.
Dependencies are inferred from the claim text.