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 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;
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; and
said implant being made of a material that is wholly bioabsorbable.
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.
146 Citations
22 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 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;
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; and
said implant being made of a material that is wholly bioabsorbable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. 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 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; and
a plurality of channels extending from one of said upper and lower arcuate portions to the other of said upper and lower arcuate portions for permitting for the growth of bone from vertebral body to vertebral body through said implant, at least two of said channels being isolated from one another by a portion of said implant. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification