Back to results
US 7,004,971 B2Granted
Annular nucleus pulposus replacement
AssigneeDepuy Acromed, Inc.
InventorsHassan A. Serhan, Andrew Dooris
Life of this patent
Estimating the term…
Abstract
An annular nucleus pulposus replacement device having a large central cavity.
Claims23
A prosthetic nucleus pulposus replacement device comprising:
- a) an outer surface having a radius and adapted to conform to an inner wall of an annulus fibrosus, and
- b) an inner surface having a radius and defining a central recess,
- wherein the outer and inner surfaces define a solid, deformable, load-bearing thickness therebetween, and
- wherein the ratio of the radius of the inner surface to the radius of the outer surface is at least 30%.
- wherein the device consists essentially of a material selected from the group consisting of a rubber and an elastomer, and
- wherein the device is made of a material having a modulus of compression of between 5 MPa and 7 MPa.
3 more elements
A prosthetic nucleus pulposus replacement device having a continuous ring shape and comprising:
- a) an upper surface adapted to bear against an upper endplate,
- b) a lower surface adapted to bear against a lower endplate,
- c) an outer surface having a radius and adapted to conform to an inner wall of an annulus fibrosus,
- d) a through hole having a radius and extending from the upper surface to the lower surface, and
- e) an inner surface having a radius and defining a central recess,
- wherein the device consists essentially of a material selected from the group consisting of a rubber and an elastomer, and
- wherein the outer and inner surfaces define a solid, deformable, load-bearing thickness therebetween,
- and wherein the device is made of a material having a modulus of compression of between 5 MPa and 7 MPa.
5 more elements
Dependencies are inferred from the claim text.