Bone anchor systems
First Claim
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1. A bone anchor system comprising:
- a bone anchor configured for insertion into an outer surface of a vertebral body that is perpendicular to an endplate surface of the vertebral body, the bone anchor comprising;
a neck,wherein said neck comprises an attachment site along at least a portion of its length;
a plate-like keel extending at least substantially perpendicular from the neck and comprising a leading edge,wherein the leading edge of the plate-like keel is configured for advancement within the outer surface of the vertebral body along a trajectory that is at least substantially parallel with the endplate surface,wherein said attachment site is configured to be positioned such that at least a portion of the attachment site remains proud of the endplate surface of the vertebral body upon insertion of the bone anchor,wherein the plate-like keel is configured for countersinking within said outer surface of the vertebral body such that no portion of said bone anchor remains outside said outer surface; and
a flexible barrier coupled to the attachment site such that the flexible barrier is proud of the endplate surface upon insertion of the bone anchor.
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Abstract
Embodiments of the invention relate generally to tissue anchors and methods of delivering same to the intervertebral disc or other sites within the body. In some embodiments, the anchors provide pull-out resistance, stability and/or maximize contact with tissue involving a minimum amount of penetration. In some embodiments, delivery methods are minimally invasive and include linear, lateral, and off-angle implantation or driving of anchors along, against or within tissue surfaces.
675 Citations
20 Claims
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1. A bone anchor system comprising:
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a bone anchor configured for insertion into an outer surface of a vertebral body that is perpendicular to an endplate surface of the vertebral body, the bone anchor comprising; a neck, wherein said neck comprises an attachment site along at least a portion of its length; a plate-like keel extending at least substantially perpendicular from the neck and comprising a leading edge, wherein the leading edge of the plate-like keel is configured for advancement within the outer surface of the vertebral body along a trajectory that is at least substantially parallel with the endplate surface, wherein said attachment site is configured to be positioned such that at least a portion of the attachment site remains proud of the endplate surface of the vertebral body upon insertion of the bone anchor, wherein the plate-like keel is configured for countersinking within said outer surface of the vertebral body such that no portion of said bone anchor remains outside said outer surface; and a flexible barrier coupled to the attachment site such that the flexible barrier is proud of the endplate surface upon insertion of the bone anchor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A bone anchor system comprising:
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a bone anchor configured for insertion into an outer surface of a vertebral body that is perpendicular to an endplate surface of the vertebral body, the bone anchor comprising; a neck, wherein said neck comprises an attachment site along at least a portion of its length; a bone anchoring region extending at least substantially perpendicular from the neck and comprising a leading edge, wherein the leading edge of the bone anchoring region is configured for advancement within the outer surface of the vertebral body along a trajectory that is generally parallel with the endplate surface, wherein said attachment site is configured to be positioned such that at least a portion of the attachment site remains proud of the endplate surface of the vertebral body during insertion of the bone anchor, wherein the bone anchoring region is configured for countersinking within said outer surface of the vertebral body such that no portion of said bone anchor remains exterior to said outer surface; and a reinforcement member coupled to the attachment site such that the reinforcement member is proud of the endplate surface upon insertion of the bone anchor and configured to provide reinforcement to an anulus of an intervertebral disc adjacent the endplate surface. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A bone anchor system comprising:
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a bone anchor configured for insertion into an outer surface of a vertebral body that is perpendicular to an endplate surface of the vertebral body, the bone anchor comprising; a neck, wherein said neck comprises an attachment site; a bone anchoring portion extending at least substantially perpendicular from the neck and comprising a leading edge, wherein the leading edge of the bone anchoring portion is configured for advancement within the outer surface of the vertebral body in a direction that is at least substantially parallel with the endplate surface, wherein said attachment site is configured to be positioned such that at least a portion of the attachment site remains proud of the endplate surface of the vertebral body upon insertion of the bone anchor, wherein the bone anchoring portion is configured for countersinking within said outer surface of the vertebral body such that no portion of said bone anchor remains outside said outer surface; and
a flexible barrier coupled to the attachment site. - View Dependent Claims (19, 20)
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Specification