Spinal implant
AssigneeGeorge J. Picha
InventorsGeorge J. Picha, Jeffrey A. Goldstein
Life of this patent
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Abstract
A spinal implant including a hollow, generally tubular shell having an exterior lateral surface, a leading end, and a trailing end. The shell has a helical thread projecting from its exterior surface. The thread includes a plurality of pillars. Each pillar has a height of 100-4500 microns and a lateral dimension at the widest point of 100-4500 microns. The exterior surface has a plurality of holes therethrough to permit bone growth therethrough. The spinal implant may alternatively have a plurality of pillars projecting from its exterior surface in a regular, non-helical array.
Claims5
A spinal implant comprising a hollow, generally tubular shell having an exterior surface, a first end, and a second end, a plurality of pillars projecting from said exterior surface in a regular, non-helical, herringbone arrangement, each pillar being substantially rectangular in top view having a width of 100-1000 microns, a length of 400-4500 microns, and a height of 150-2000 microns, said exterior surface having a plurality of holes therethrough to permit bone growth therethrough.
A spinal implant comprising a cylindrical shell defining an interior chamber, said shell having an exterior surface with a plurality of pillars extending therefrom, said pillars being substantially rectangular in top view, arranged in a regular, non-helical, herringbone arrangement, and each having a width of 100-1000 microns, a length of 400-4500 microns, and a height of 150-2000 microns, said exterior surface having a plurality of holes extending therethrough for facilitating bone ingrowth, said holes being interspersed with the pillars and each having a dimension of 150-1500 microns.
A spinal implant comprising a hollow, generally tubular shell having an exterior surface, a substantially open first end and a substantially open second end, a plurality of pillars projecting from said exterior surface in a regular, non-helical, herringbone arrangement, said pillar being distributed across substantially all of said exterior surface, each pillar being substantially rectangular in top view and having a height of 150-2000 microns, a width of 100-1000 microns, and a length of 400-4500 microns, said exterior surface having a plurality of holes therethrough to permit bone growth therethrough.
A spinal implant comprising a cylindrical shell defining an interior chamber, said shell having an exterior surface with a plurality of pillars extending therefrom, said pillars being distributed across substantially all of said exterior surface, said pillars being arranged in a regular, non-helical, herringbone arrangement, each pillar being substantially rectangular in top view and having a width of 100-1000 microns, a length of 400-4500 microns, and a height of 150-2000 microns, said exterior surface having a plurality of holes extending therethrough for facilitating bone ingrowth, said holes being interspersed with the pillars and each having a dimension of 150-1500 microns.
Dependencies are inferred from the claim text.