APPARATUS AND METHOD FOR PERFORMING SPINAL SURGERY
First Claim
1. A prosthetic device comprising:
- a first compressible member sized to substantially replace the nucleus pulposus of a first intervertebral disc;
a second compressible member sized to substantially replace the nucleus pulposus of a second intervertebral disc that is separated from the first intervertebral disc by a vertebral body; and
a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members.
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Accused Products
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.
146 Citations
57 Claims
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1. A prosthetic device comprising:
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a first compressible member sized to substantially replace the nucleus pulposus of a first intervertebral disc; a second compressible member sized to substantially replace the nucleus pulposus of a second intervertebral disc that is separated from the first intervertebral disc by a vertebral body; and a fixation member sized to fit within a cavity in the vertebral body between the first and second compressible members. - View Dependent Claims (2, 3, 4, 5)
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6. A prosthetic device comprising:
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a fixation member sized to fit within a cavity in a first vertebral body; and a compressible member sized to substantially replace a nucleus pulposus of an intervertebral disc adjacent the vertebral body, wherein; (A) a first side of the compressible member is configured to engage the fixation member and a second side of the compressible member is configured to engage a second vertebral body, and (B) the second side of the compressible member is configured to fit within a seat formed in the cortical bone of the endplate of the second vertebral body.
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7. An intervertebral prosthetic device for implantation in a spine, comprising:
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a rigid fixation member having a fixed length, the rigid fixation member being configured to be placed in a cavity of a vertebral body and against bone of the vertebral body; and a first compressible member configured to be placed in a cavity in a first intervertebral disc adjacent the vertebral body and to be secured to the rigid fixation member, wherein; (A) the compressible member is constructed to remain compressible after implantation and has at least one compressible element that remains compressible after implantation, and (B) the rigid fixation member is sized to compress the compressible member a predetermined amount when the rigid fixation member and the first compressible member are placed in the cavity in the first vertebral body and in the cavity in the first intervertebral disc, respectively. - View Dependent Claims (8, 9, 10, 11, 12)
wherein the second compressible member is configured to be; (A) placed in a cavity in a second intervertebral disc adjacent the vertebral body on the opposite side as the first intervertebral disc; and (B) secured to the rigid fixation member.
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9. The intervertebral prosthetic device according to claim 8, wherein the first and second compressible members are sized to replace the nucleus pulposuses of the first and second intervertebral discs, respectively.
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10. The intervertebral prosthetic device according to claim 7, wherein the rigid fixation member is composed of a bioresorbable material.
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11. The intervertebral prosthetic device according to claim 7, wherein the first compressible member has a plate opposite the rigid fixation member having a convex outer surface.
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12. The intervertebral prosthetic device according to claim 11, wherein the convex lowermost surface is configured to rest within a corresponding concave indentation formed in a second vertebral body adjacent thereto.
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13. An intervertebral prosthetic device for implantation in a spine comprising:
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a fixation member configured to be placed in a cavity of a vertebral body, the fixation member comprising; an outer member configured to be placed against bone of the vertebral body; an inner member opposite the outer member; and at least one adjustment element that extends between the outer and inner members and that is configured to adjust a length dimension of the fixation member along its longitudinal axis; a compressible member configured to be placed in a cavity in an intervertebral disc adjacent the vertebral body and configured to be secured to the inner member of the fixation member; and a spacer sized to fit between the outer and inner members of the fixation member to maintain the fixation member at a desired length dimension. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. An intervertebral prosthetic device for implantation in a spine, comprising:
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a fixation member configured to be placed in a cavity of a vertebral body, the fixation member comprising; an outer member configured to be placed against bone of the vertebral body; an inner member opposite the outer member; and a longitudinal axis extending between the outer and inner members; and a compressible member configured to be placed in a cavity in an intervertebral disc and to be secured to the inner member of the fixation member, wherein; (A) the compressible member is constructed to remain compressible after implantation, and (B) the outer member includes a tab extending outward along an axis different from the longitudinal axis. - View Dependent Claims (22, 23, 24)
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25. An intervertebral prosthetic device for implantation in a spine, comprising:
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a fixation member configured to be placed in a cavity of a vertebral body, the fixation member comprising; an outer member configured to be placed against bone of the vertebral body; an inner member opposite the outer member; and a longitudinal axis extending between the outer and inner members; a compressible member configured to be placed in a cavity in an intervertebral disc adjacent the vertebral body and configured to be secured to the fixation member; and at least one anchor element configured to immobilize and/or stabilize the compressible member and/or the fixation member. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A prosthetic device comprising:
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a fixation member sized to fit within a cavity in a first vertebral body; and a compressible member comprising; a cup-shaped base member; an upper member; and one or more compressible elements provided between the base member and the upper member, wherein the compressible member is sized to substantially replace a nucleus pulposus of an intervertebral disc adjacent the vertebral body. - View Dependent Claims (32, 33)
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34. A prosthetic device comprising:
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a fixation member sized to fit within a cavity in a first vertebral body; and a compressible member comprising; a base member; an upper member that includes a spike; and one or more compressible elements provided between the base member and the upper member, wherein the one or more compressible elements are sized to substantially replace a nucleus pulposus of an intervertebral disc adjacent the vertebral body. - View Dependent Claims (35)
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36. A prosthetic device comprising:
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a fixation member sized to fit within a cavity in a first vertebral body; and a compressible member comprising; a base member; an upper member comprising a ball-and-socket joint; and one or more compressible elements provided between the base member and the upper member, wherein the compressible member is sized to substantially replace a nucleus pulposus of an intervertebral disc adjacent the vertebral body. - View Dependent Claims (37, 38, 39)
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40. A prosthetic device comprising:
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a fixation member sized to fit within a cavity in a first vertebral body; and a compressible member comprising; a base member; an upper member; and one or more compressible elements provided between the base member and the upper member, wherein; (A) the compressible member is sized to substantially replace a nucleus pulposus of an intervertebral disc adjacent the vertebral body, and (B) the base member is adjustable in a radial direction. - View Dependent Claims (41, 42)
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43. A method of spinal prosthetic implantation, the method comprising the step of:
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creating a cavity in a first vertebral body; cutting a first hole through either a lower or an upper endplate of the vertebral body and through the nucleus pulposus of a first intervertebral disc adjacent thereto, thereby creating a first opening in the first intervertebral disc; cutting a second hole through the other of the lower and upper endplate of the vertebral body and through the nucleus pulposus of a second intervertebral disc adjacent thereto, thereby creating a second opening in the second intervertebral disc; implanting a first compressible member into one of the first and second openings; implanting a second compressible member into the other of the first or second openings; and implanting a fixation member into the cavity in the first vertebral body. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50)
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51. A method of spinal prosthetic implantation, the method comprising the steps of:
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creating a cavity in a first vertebral body; cutting through an endplate of the vertebral body and through the nucleus pulposus of an adjacent intervertebral disc, thereby creating an opening in the intervertebral disc; cutting into the cortical bone of a second vertebral body on the other side of the intervertebral disc to create a seat; implanting a compressible member into the opening in the intervertebral disc such that a distal end of the compressible member sits within the seat in the second vertebral body; and implanting a fixation member in the cavity in the first vertebral body. - View Dependent Claims (52)
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53. A method of spinal prosthetic implantation, the method comprising the step of:
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creating a cavity in a vertebral body; cutting a hole through either a lower or an upper endplate of the vertebral body and through the nucleus pulposus of an intervertebral disc adjacent thereto, thereby creating an opening in the intervertebral disc; implanting a compressible member into the opening in the intervertebral disc; and implanting a fixation member into the cavity in the first vertebral body, wherein; (i) the compressible member comprises a base member that is wider than the hole cut in the vertebral body through which the first compressible member is implanted, and (ii) the step of implanting the compressible member into the opening comprises the steps of;
(a) maneuvering the base member of the compressible member so that it passes through the hole and into the opening; and
(b) rotating the base member so that it substantially covers the hole.- View Dependent Claims (54)
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55. A method of spinal prosthetic implantation, the method comprising the step of:
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creating a cavity in a vertebral body; cutting a hole through either a lower or an upper endplate of the vertebral body and through the nucleus pulposus of an intervertebral disc adjacent thereto, thereby creating an opening in the intervertebral disc; implanting a compressible member into the opening in the intervertebral disc; and implanting a fixation member into the cavity in the first vertebral body, wherein; (i) the compressible member comprises a base member that is radially adjustable to be wider than the hole cut in the vertebral body through which the compressible member is implanted, and (ii) the step of implanting the compressible member into the opening comprises the steps of;
(a) maneuvering the base member of the compressible member so that it passes through the hole and into the opening; and
(b) radially adjusting the base member so that it substantially covers the hole.- View Dependent Claims (56)
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57. A drill guide for use in spinal surgery, comprising a body having a first leg and a second leg, wherein:
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(A) the first leg is dimensioned to be fixed relative to an intervertebral prosthetic member mounted in a cavity of a first vertebral body, (B) the second leg is dimensioned to extend from the first leg, adjacent the first vertebral body, to a free end, adjacent at least one of an intervertebral disc and a second vertebral body, and (C) the second leg includes at least one drilling channel extending through the second leg and the free end of the second leg comprises a drill positioning block through which the at least one drilling channel extends.
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Specification