Spinal interbody device
AssigneeMedgem, LLC
InventorThomas J. Morrison, III
Life of this patent
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Abstract
A multi-material spinal interbody device includes an inner dampener of compressible material in combination with a rigid outer material. The rigidity of the outer periphery of curved surfaces of the device, such as in an eluipsoid shape, provide support as a replacement to the nucleus propulsus, with the inner dampener providing for absorption of spinal forces.
Claims23
An interbody device comprising a first curved and centrally convex vertebral body contact surface of a top shell, a second curved and centrally convex lower vertebral body contact surface of a bottom shell opposite the first vertebral body contact surface and a compressible inner dampener with an ellipsoid central core portion coupled between concave, ellipsoidal inner surface portions underlying each of the centrally convex vertebral body contact surfaces of the top and bottom shells and a compressible equatorial planar surface portion extending outwardly from around a circumference of an equatorial region of the central core portion and between non-concave periphery portions of the top and bottom shells.
An interbody device comprising two or more materials of different compressibility in an ellipsoidal shape having at least opposite curved and centrally convex surfaces in opposite outer shell portions adapted for contacting vertebral bodies wherein an inner dampener is coupled between the opposite outer shell portions and the inner dampener includes a compressible central core portion with top and bottom convex surfaces secured within central recessed portions of each shell underlying the centrally convex surfaces of the opposite outer shell portions and a compressible planar surface portion extending outwardly from around a perimeter around the central core portion and between non-concave periphery portions of each shell.
Dependencies are inferred from the claim text.