Frusto-conical spinal implant
First Claim
1. An interbody spinal fusion implant for insertion across the surgically corrected height of a disc space between two adjacent vertebral bodies of a human spine, said implant comprising:
- a leading end for insertion first into the disc space, a trailing end opposite said leading end, and a length between said ends;
opposed upper and lower portions adapted to contact the adjacent vertebral bodies when implanted in the spine, said opposed upper and lower portions of said implant including at least one opening in communication with one another for permitting for the growth of bone from vertebral body to vertebral body through said implant; and
non-threaded bone engaging projections for engaging said implant to the adjacent vertebral bodies, said bone engaging projections extending from at least a portion of said opposed upper and lower portions, at least two of said bone engaging projections each having a forward facet directed at least in part toward said leading end, each of said forward facets having a slope, the slope of at least one of said forward facets being different from the slope of another of said forward facets of said at least two bone engaging projections.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention is directed to a variety of interbody spinal fusion implants having at least a partially frusto-conical configuration. The spinal fusion implants of the present invention may be relatively solid or hollow and may have surface roughenings to promote bone ingrowth and stability. The spinal fusion implants of the present invention may have wells extending into the material of the implant from the surface for the purpose of holding fusion promoting materials and to provide for areas of bone ingrowth fixation. A variety of surface irregularities may be employed to increase implant stability and implant surface area, and/or for the purpose of advancing the spinal fusion implant into the fusion site.
113 Citations
55 Claims
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1. An interbody spinal fusion implant for insertion across the surgically corrected height of a disc space between two adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end for insertion first into the disc space, a trailing end opposite said leading end, and a length between said ends;
opposed upper and lower portions adapted to contact the adjacent vertebral bodies when implanted in the spine, said opposed upper and lower portions of said implant including at least one opening in communication with one another for permitting for the growth of bone from vertebral body to vertebral body through said implant; and
non-threaded bone engaging projections for engaging said implant to the adjacent vertebral bodies, said bone engaging projections extending from at least a portion of said opposed upper and lower portions, at least two of said bone engaging projections each having a forward facet directed at least in part toward said leading end, each of said forward facets having a slope, the slope of at least one of said forward facets being different from the slope of another of said forward facets of said at least two bone engaging projections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A non-threaded interbody spinal fusion implant for insertion across the surgically corrected height of a disc space between two adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end for insertion first into the disc space, a trailing end opposite said leading end, a length between said ends, and a mid-longitudinal axis passing through said leading and trailing ends;
opposed upper and lower portions adapted to contact the adjacent vertebral bodies when implanted in the spine, said opposed upper and lower portions being angled relative to one another so as to maintain an angulation of the adjacent vertebral bodies relative to one another, said opposed upper and lower portions of said implant including at least one opening in communication with one another for permitting for the growth of bone from vertebral body to vertebral body through said implant, said opposed upper and lower portions each having an exterior that includes a portion of an arc of a circle, said arcuate portions of said opposed upper and lower portions being arcs of the same circle; and
opposite sides between said upper portion and said lower portion, and between said leading and trailing ends, at least one of said opposite sides having an exterior portion that is not a portion of the same circle as said arcuate portions of said opposed upper and lower portions. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A push-in interbody spinal fusion implant for insertion across the surgically corrected height of a disc space between two adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end for insertion first into the disc space, a trailing end opposite said leading end, a length between said ends, and a mid-longitudinal axis passing through said ends;
opposed upper and lower arcuate portions adapted to contact the adjacent vertebral bodies when implanted in the spine, said opposed upper and lower arcuate portions being angled relative to one another so as to maintain an angulation of the adjacent vertebral bodies relative to one another, said opposed upper and lower arcuate portions of said implant including at least one opening in communication with one another for permitting for the growth of bone from vertebral body to vertebral body through said implant; and
non-threaded bone engaging projections for engaging said implant to the adjacent vertebral bodies, said bone engaging projections extending from at least a portion of said opposed upper and lower portions, at least one of said bone engaging projections extending uninterrupted around the mid-longitudinal axis of said implant. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification