Interbody fusion grafts and instrumentation
First Claim
Patent Images
1. A spinal fusion implant, comprising:
- an elongate bone portion defining a longitudinal axis and having a generally rectangular cross-section transverse to the longitudinal axis, said bone portion comprising;
a first end portion and an opposite second end portion;
a first bone engaging surface;
a second bone engaging surface;
a first sidewall extending between said first and second bone engaging surfaces, wherein the first sidewall comprises a concave outer surface extending axially between said first and second end portions; and
a second sidewall arranged opposite said first sidewall and extending between said first and second bone engaging surfaces, wherein said second sidewall comprises a convex outer surface extending axially between said first and second end portions; and
wherein said concave outer surface of said first sidewall extends generally parallel with and is positioned opposite said convex outer surface of said second sidewall to provide said elongate bone portion with a generally crescent shaped cross-section in a plane including the longitudinal axis.
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Abstract
This invention relates to implants formed from donor bone for use in lumbar interbody fusion procedures and instruments for performing such procedures. The implants are formed to include a concave surface formed from a portion of the medullary canal of a long bone. The concaved surface defines a recess in the implant that serves as a depot for osteogenic material. Specific instruments for inserting the implants prepared according to this invention and for preparing the intervertebral space to receive the implants are also provided.
669 Citations
38 Claims
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1. A spinal fusion implant, comprising:
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an elongate bone portion defining a longitudinal axis and having a generally rectangular cross-section transverse to the longitudinal axis, said bone portion comprising; a first end portion and an opposite second end portion; a first bone engaging surface; a second bone engaging surface; a first sidewall extending between said first and second bone engaging surfaces, wherein the first sidewall comprises a concave outer surface extending axially between said first and second end portions; and a second sidewall arranged opposite said first sidewall and extending between said first and second bone engaging surfaces, wherein said second sidewall comprises a convex outer surface extending axially between said first and second end portions; and wherein said concave outer surface of said first sidewall extends generally parallel with and is positioned opposite said convex outer surface of said second sidewall to provide said elongate bone portion with a generally crescent shaped cross-section in a plane including the longitudinal axis. - 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)
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25. A spinal fusion implant, comprising:
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an elongate bone portion defining a longitudinal axis and having a generally rectangular cross-section transverse to the longitudinal axis, said bone portion comprising; a first end portion and an opposite second end portion; a first bone engaging surface; a second bone engaging surface; a first sidewall extending between said first and second bone engaging surfaces, wherein the first sidewall comprises a concave outer surface extending axially between said first and second end portions; and a second sidewall arranged opposite said first sidewall and having a substantially planar portion defining a flat outer surface extending between said first and second bone engaging surfaces and axially along a length of said elongate bone portion between said first and second end portions; and wherein said concave outer surface of said first sidewall is positioned opposite said flat outer surface of said second sidewall.
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26. A spinal fusion implant, comprising:
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an elongate bone portion defining a longitudinal axis and having a generally rectangular cross-section transverse to the longitudinal axis, said bone portion comprising; a first end portion and an opposite second end portion; a first bone engaging surface; a second bone engaging surface; and a first sidewall extending along a length of the elongated bone portion and comprising a first substantially planar outer surface adjacent said first end portion and a second substantially planar outer surface adjacent said second end portion, said first and second substantially planar outer surfaces extending between said first and second bone engaging surfaces and axially along the longitudinal axis, the first sidewall further comprising a concave outer surface extending axially between said first and second substantially planar surfaces and between said first and second bone engaging surfaces.
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27. A spinal fusion implant, comprising:
an elongate bone portion defining a length extending along a longitudinal axis and comprising; a first sidewall comprising a concave outer surface extending along the length; a second sidewall opposite said first side wall and comprising a convex outer surface extending along the length; and wherein the convex outer surface of said second sidewall is positioned opposite and is arranged generally parallel to the concave outer surface of said first sidewall to provide said elongate bone portion with a generally crescent shaped cross-section in a plane including the longitudinal axis; a first bone engaging surface positioned between the first and second sidewalls; and a second bone engaging surface opposite the first bone engaging surface. - View Dependent Claims (28)
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29. An implant for implantation in a disc space between adjacent vertebrae, said implant formed of bone and comprising:
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a first end portion and an opposite second end portion, said first and second end portions arranged along a longitudina1 axis; a first bone engaging surface and an opposite second bone engaging surface, each of said bone engaging surfaces being planar; a first side wall disposed between the first bone engaging surface and the second bone engaging surface, said first side wall having a cavity disposed between the first end portion and the second end portion, said cavity defining a concave outer surface extending axially between the first end portion and the second end portion and from the first bone engaging surface to the second bone engaging surface; and a second side wall opposite the first side wall and disposed between the first bone engaging surface and the second bone engaging surface, said second side wall defining a convex outer surface disposed between the first end portion and the second end portion; and wherein said concave outer surface of said first side wall extends generally parallel with and is positioned opposite said convex outer surface of said second side wall to provide the implant with a generally crescent shaped cross-section in a plane including the longitudinal axis. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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38. An implant for implantation in a disc space between adjacent vertebrae, said implant formed of bone and comprising:
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a first end portion and an opposite second end portion, said first and second end portions arranged along a longitudinal axis; a first bone engaging surface and an opposite second bone engaging surface, each of said bone engaging surfaces being planar; a first side wall disposed between the first bone engaging surface and the second bone engaging surface, said first side wall having a cavity disposed between the first end portion and the second end portion, said cavity defining a concave outer surface extending axially between the first end portion and the second end portion and from the first bone engaging surface to the second bone engaging surface; and a second side wall arranged opposite the first side wall and disposed between the first bone engaging surface and the second bone engaging surface, said second side wall comprising a substantially planar portion defining a flat outer surface extending between said first and second bone engaging surfaces and axially between the first end portion and the second end portion along the longitudinal axis; and wherein said concave outer surface defined by said first side wall is positioned opposite said flat outer surface of said second side wall.
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Specification