Spinal implant having deployable bone engaging projections and method for installation thereof
AssigneeWarsaw Orthopedic, Inc.
InventorGary K. Michelson
Life of this patent
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Abstract
Instrumentation is disclosed for inserting an interbody spinal fusion implant for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine. The implant has an external housing and a substantially hollow internal rotatable member having bone engaging projections that are deployable through the housing to penetrably engage the adjacent vertebral bodies.
Claims20
A method for inserting an interbody spinal implant at least in part within a disc space between two adjacent vertebral bodies of a human spine, the method comprising:
- providing the spinal implant having a body with an upper portion, an opposite lower portion, and a height therebetween, the implant having width transverse to the height and greater than the height, the implant having first and second rotatable shafts, each shaft having a plurality of bone engaging projections, each of the bone engaging projections being spaced apart from one another, the first and second shafts being rotatable from an undeployed position wherein the bone engaging projections are positioned at least in part within the body of the implant to a deployed position wherein the bone engaging projections are positioned at least in part outside of the body of the implant;
- removing at least a portion of disc material from the disc space to create an implantation space for insertion of the spinal implant;
- preparing the implantation space by removing a portion of bone from at least one of the adjacent vertebral bodies, the implantation space being sized to receive at least a portion of the spinal implant;
- inserting the spinal implant into the implantation space;
- rotating the first shaft to deploy the bone engaging projections of the first shaft to penetrably engage one of the adjacent vertebral bodies;
- and
- rotating the second shaft to deploy the bone engaging projections of the second shaft to penetrably engage one of the adjacent vertebral bodies.
An interbody spinal implant comprising:
- a body having an upper portion and a lower portion, said upper portion having a first arcuate portion, a second arcuate portion, and a non-arcuate portion separating said first and second arcuate portions, each of said arcuate portions including a plurality of recesses;
- and
- first and second rotatable shafts positioned at least in part within said first and second arcuate portions, respectively, each of said first and second rotatable shafts having an axis of rotation, each of said rotatable shafts including a plurality of spaced-apart bone engaging projections, said first and second rotatable shafts each being rotatable from an undeployed position wherein said bone engaging projections are positioned at least in part within said body of the implant to a deployed position wherein said bone engaging projections are positioned at least in part outside of said body of the implant, said bone engaging projections extending through respective ones of said recesses and into bone when in the deployed position.
Dependencies are inferred from the claim text.