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US 6,371,988 B1Granted
Bone grafts
AssigneeSDGI Holdings, Inc.
InventorsJohn Pafford, Lawrence M. Boyd, William F. McKay, Eddie F. Ray, III, James E. Van Hoeck
Life of this patent
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AssigneeSDGI Holdings, Inc.
InventorsJohn Pafford, Lawrence M. Boyd, William F. McKay, Eddie F. Ray, III, James E. Van Hoeck
Estimating the term…
Spinal spacers 20 are provided for fusion of a motion segment. The spacers include a load bearing member 21 having a wall 22 sized for engagement within a space between adjacent vertebrae to maintain the space and an effective amount of an osteogenic composition to stimulate osteoinduction. The osteogenic composition includes a substantially pure osteogenic factor in a pharmaceutically acceptable carrier. In one embodiment the load bearing member includes a bone graft impregnated in an osteogenic composition. In another embodiment, the osteogenic composition 30 is packed within a chamber 25 defined in the graft. Any suitable configuration of a bone graft is contemplated, including bone dowels, D-shaped spacers and cortical rings.
A hollow spinal spacer for engagement between vertebrae, comprising:
A spinal spacer, comprising a load bearing member of cortical bone obtained from a cross-sectional slice of the diaphysis of a long bone having a medullary canal, said member having a wall, a superior surface and an inferior surface said wall sized for engagement within an intervertebral space and defining a chamber, said chamber including a portion of the canal, at least one of said surfaces defining surface roughenings for engaging the endplates of adjacent vertebrae.
A spinal spacer, comprising a load bearing member of bone obtained from the diaphysis of a long bone having a medullary canal, said member having a wall, a superior surface and an inferior surface, said wall sized for engagement within an intervertebral space and defining a chamber, said chamber including a portion of the canal, at least one of said surfaces defining surface roughenings for engaging the endplates of adjacent vertebrae, said surface roughenings selected from the group consisting of knurlings, a waffle pattern, and teeth.
Dependencies are inferred from the claim text.