Vertebral fusion device and method
First Claim
1. An implantable orthopedic device for implantation between opposed vertebral end plates of a pair of vertebrae, the device comprising:
- an inner portion including a pair of spaced-apart end caps and an inner wall member there between, wherein the end caps and the inner wall member define a compartment; and
an outer wall member disposed about and coupled to the inner portion, wherein separation between the outer wall member and the inner portion defines an outer space, wherein the device has a size and shape such that the device can extend between the opposed vertebral end plates such that at least the end caps can be in contact with the vertebral end plates and the outer space can be in communication with the vertebral end plates.
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Abstract
A device for facilitating bone fusion of two vertebrae. The device is sized and shaped to at least extend between the two vertebrae to be fused, and includes an outer wall member disposed about an inner portion. A space between the outer wall member and the inner compartment is adapted to contain an osteogenic bone fusion material. The inner portion includes a compartment adapted to contain an inner fill material, such as a bone cement or an in situ curable polymer. The inner portion may operate as a structural member to maintain a desired amount of spacing between the vertebrae to be fused, and to support the spinal column prior to formation of the fused bone joint. The device is also configured to locate the osteogenic material away from the centers of the vertebrae to be fused, providing a fused joint with high bending and torsional rigidity.
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Citations
25 Claims
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1. An implantable orthopedic device for implantation between opposed vertebral end plates of a pair of vertebrae, the device comprising:
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an inner portion including a pair of spaced-apart end caps and an inner wall member there between, wherein the end caps and the inner wall member define a compartment; and
an outer wall member disposed about and coupled to the inner portion, wherein separation between the outer wall member and the inner portion defines an outer space, wherein the device has a size and shape such that the device can extend between the opposed vertebral end plates such that at least the end caps can be in contact with the vertebral end plates and the outer space can be in communication with the vertebral end plates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An implantable orthopedic device for implantation between opposed vertebral end plates of a pair of vertebrae, the device comprising:
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a pair of spaced apart end caps, wherein at least one of the end caps is configured to be substantially rigid;
a wall member extending between the end caps, wherein the wall member and the end caps define a compartment; and
a curable polymer fill material disposed within and substantially filling the compartment, wherein the device has a size and shape such that it can extend between the opposed vertebral end plates such that at least the end caps can be in contact with the vertebral end plates.
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23. A method of fusing a pair of vertebrae of a spine, the method comprising:
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removing a substantial portion of a disc between opposed vertebral end plates of a pair of vertebrae;
creating a first spacing between the opposed vertebral end plates;
inserting an implantable orthopedic device between the end plates, the device comprising;
a compartment having first and second end caps, and a wall member disposed about the compartment, wherein separation between the wall member and the compartment defines an outer space;
introducing a fill material into the compartment to longitudinally expand the compartment such that the end caps contact the vertebral end plates; and
substantially filling the outer space with an osteogenic material such that the osteogenic material contacts the vertebral end plates. - View Dependent Claims (24, 25)
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Specification