Method and apparatus for spinal stabilization
First Claim
Patent Images
1. A spinal stabilization device, comprising:
- an elongate body, having a proximal end and a distal end;
a distal anchor on the distal end of the elongate body;
a retention structure on the elongate body, proximal to the distal anchor; and
a proximal anchor, moveably carried by the elongate body, the proximal anchor having an outer surface, at least a portion of the outer surface being elastic, wherein the proximal anchor comprises a saddle shaped curved surface configured to limit compression of the adjacent vertebral bodies, wherein the saddle shaped curved surface is configured to limit side to side motion and/or torsion between the vertebral bodies; and
at least one complementary retention structure on the proximal anchor configured to permit distal movement of the proximal anchor with respect to the elongate body but resist proximal movement of the proximal anchor with respect to the elongate body.
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Abstract
A method of limiting at least one degree of movement between a superior vertebral body and an inferior vertebral body of a patient includes advancing a distal end of a stabilization device into a pedicle of the inferior vertebral body. A proximal portion of the stabilization device is positioned such that the proximal portion limits at least one degree of movement between a superior vertebral body and an inferior vertebral body by contacting a surface of the superior vertebral body.
136 Citations
17 Claims
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1. A spinal stabilization device, comprising:
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an elongate body, having a proximal end and a distal end; a distal anchor on the distal end of the elongate body; a retention structure on the elongate body, proximal to the distal anchor; and a proximal anchor, moveably carried by the elongate body, the proximal anchor having an outer surface, at least a portion of the outer surface being elastic, wherein the proximal anchor comprises a saddle shaped curved surface configured to limit compression of the adjacent vertebral bodies, wherein the saddle shaped curved surface is configured to limit side to side motion and/or torsion between the vertebral bodies; and at least one complementary retention structure on the proximal anchor configured to permit distal movement of the proximal anchor with respect to the elongate body but resist proximal movement of the proximal anchor with respect to the elongate body. - View Dependent Claims (2, 3, 4, 5)
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6. A spinal stabilization device comprising:
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an elongate body having a proximal end and a distal end; a distal anchor on the distal end of the elongate body; a retention structure on the elongate body, proximal to the distal anchor; a proximal anchor formed, at least in part, from an elastic material, wherein the proximal anchor comprises a flat shaped surface configured to limit compression of the adjacent vertebral bodies, wherein the flat shaped surface is configured to limit side to side motion and/or torsion between the vertebral bodies; and at least one complementary retention structure on the proximal anchor configured to permit distal movement of the proximal anchor with respect to the elongate body but resist proximal movement of the proximal anchor with respect to the elongate body. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A spinal stabilization device comprising:
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an elongate body having a proximal end and a distal end; a distal anchor on the distal end of the elongate body; a retention structure on the elongate body, proximal to the distal anchor; a proximal anchor comprising a resilient material, wherein the proximal anchor comprises a shape configured to limit or eliminate rotation of the proximal anchor with respect to the elongate body and/or the vertebral body, wherein the proximal anchor comprises a rectangular shape; and at least one complementary retention structure on the proximal anchor configured to permit distal movement of the proximal anchor with respect to the elongate body but resist proximal movement of the proximal anchor with respect to the elongate body. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification