Method and apparatus for spinal stabilization
First Claim
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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 body, proximal to the distal anchor;
a proximal anchor including one or more spikes positioned on a contacting surface of the proximal anchor, the one or more spikes configured to limit rotation of the proximal anchor with respect to the elongate body when the proximal anchor is positioned against bone or tissue; 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.
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Citations
20 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 body, proximal to the distal anchor; a proximal anchor including one or more spikes positioned on a contacting surface of the proximal anchor, the one or more spikes configured to limit rotation of the proximal anchor with respect to the elongate body when the proximal anchor is positioned against bone or tissue; 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, 6, 7, 8)
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9. 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 including one or more serrations, the one or more serrations configured to provide additional gripping support when the proximal anchor is positioned against uneven bone surfaces or soft tissue; 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 (10, 11, 12, 13, 14, 15, 16)
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17. 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 including one or more bone engagement features, the one or more bone engagement features positioned on the distal end of the proximal anchor, the one or more bone engagement features configured to provide additional gripping support of the proximal anchor and limit rotation of the proximal anchor with respect to the elongate body; 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 (18, 19, 20)
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Specification