Apparatus and method for performing spinal surgery
First Claim
1. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
- a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place;
a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member in place;
a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation; and
a releasable connection that connects at least one of the first and second compressible members to the fixation member,wherein the fixation member comprises a plurality of adjustable members and a wedge-shaped member.
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Abstract
An embodiment of an intervertebral prosthetic device for implantation in a spine includes a rigid fixation member and a compressible member. The fixation member is configured to be placed in a cavity of a first vertebral body and against bone of the first vertebral body. The compressible member is configured to be placed in a cavity in an intervertebral disc and to be secured to the first fixation member. Another embodiment includes two compressible members and one fixation member. In this embodiment, the first and second compressible members are sized to substantially replace the nucleus pulposus of first and a second intervertebral discs, respectively, on either side of a vertebral body. The fixation member is sized to fit within a cavity in the vertebral body between the first and second compressible members.
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Citations
57 Claims
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1. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place; a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member in place; a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation; and a releasable connection that connects at least one of the first and second compressible members to the fixation member, wherein the fixation member comprises a plurality of adjustable members and a wedge-shaped member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place; a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member in place; and a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation, wherein at least one of the first compressible member and second compressible member includes a plurality of compressible elements and the at least one of the first compressible member and second compressible member is open on lateral sides to permit fibrous tissue to grow on and between the compressible elements, and wherein the fixation member comprises a plurality of adjustable members and a wedge-shaped member. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place; a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member n place; and a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation, wherein the fixation member comprises a plurality of adjustable members and a wedge-shaped member, and wherein the adjustable members and the fixation member are open on lateral sides to permit bone tissue to grow on and between the adjustable members. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place; a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member in place; and a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation, wherein the fixation member includes a first member, a second member spaced from the first member, adjustable members that extend from the first member to the second member and a wedge-shaped member, wherein the adjustable members are configured to permit free movement of the first member relative to the second member for the adjustment of spacing between the first member and the second member along a longitudinal axis of the fixation member, and the adjustable members are configured to prevent movement of the first member relative to the second member along a latitudinal axis of the fixation member. - View Dependent Claims (40, 41, 42, 43, 44)
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45. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place; a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member in place; and a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation, wherein at least one of the first compressible member and second compressible member is configured and connected so as to be fixed in position at an interface with another portion of the prosthetic device, and wherein the fixation member comprises a plurality of adjustable members and a wedge-shaped member. - View Dependent Claims (46, 47, 48, 49)
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50. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place; a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member in place; a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation; and a wedge-shaped support member disposed between the fixation member and one of the first and second compressible members, wherein the fixation member comprises a plurality of adjustable members and the wedge-shaped support member. - View Dependent Claims (51, 52)
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53. A prosthetic device for treating first and second intervertebral discs, the prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of the first intervertebral disc and to be surrounded by and substantially maintain the annulus fibrosis of the first intervertebral disc so that the annulus fibrosis can retain the first compressible member in place; a second compressible member sized to substantially replace the nucleus pulposus of the second intervertebral disc, that is separated from the first intervertebral disc by a vertebral body, and to be surrounded by and substantially maintain the annulus fibrosis of the second intervertebral disc so that the annulus fibrosis can retain the second compressible member in place; and a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members and configured to maintain a fixed length after implantation, wherein at least one of the first compressible member and second compressible member includes a plurality of compressible elements, wherein at least one of the compressible elements has a different characteristic from another of the compressible elements to provide corrective loading on a malaligned spine, and wherein the fixation member comprises a plurality of adjustable members and a wedge-shaped member. - View Dependent Claims (54, 55, 56, 57)
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Specification