SPINAL IMPLANTS
First Claim
Patent Images
1. A spinal implant comprising:
- a superior surface and an inferior surface opposite the superior surface, at least one of the superior surface and the inferior surface comprising a plurality of teeth;
a posterior portion having a leading edge;
wherein the leading edge of the posterior portion forms a central notch along a medial-lateral midline of the implant, the central notch resulting in two posterior points of the leading edge that are at a posterior-most point of the spinal implant and that are configured to rest against a spine and to provide a stable resting position for the spinal implant during impaction, the two posterior points of the leading edge comprising a first posterior point on a medial side of the spinal implant and a second posterior point on a lateral side of the spinal implant;
wherein the leading edge of the posterior portion further forms a medial notch on a medial side of the spinal implant, the medial notch being medial and anterior to the first posterior point of the leading edge on the medial side of the spinal implant;
wherein the leading edge of the posterior portion further forms a lateral notch on a lateral side of the spinal implant, the lateral notch being lateral and anterior to the second posterior point of the leading edge on the lateral side of the spinal implant; and
wherein the medial notch and the lateral notch are configured to reduce the likelihood of tissue compression against a nerve root once the spinal implant is implanted.
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Accused Products
Abstract
Disclosed are improved spinal implants that are configured to help prevent post-operative migration of the implant. In some embodiments, the implant system includes multi-axial tooth geometry and other geometrical configurations such as but not limited to peripheral curvatures that aid in the prevention of such post-operative migration. Also disclosed are asymmetrical implants having superior and inferior surfaces with different angulations relative to the sagittal midline.
8 Citations
20 Claims
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1. A spinal implant comprising:
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a superior surface and an inferior surface opposite the superior surface, at least one of the superior surface and the inferior surface comprising a plurality of teeth; a posterior portion having a leading edge; wherein the leading edge of the posterior portion forms a central notch along a medial-lateral midline of the implant, the central notch resulting in two posterior points of the leading edge that are at a posterior-most point of the spinal implant and that are configured to rest against a spine and to provide a stable resting position for the spinal implant during impaction, the two posterior points of the leading edge comprising a first posterior point on a medial side of the spinal implant and a second posterior point on a lateral side of the spinal implant; wherein the leading edge of the posterior portion further forms a medial notch on a medial side of the spinal implant, the medial notch being medial and anterior to the first posterior point of the leading edge on the medial side of the spinal implant; wherein the leading edge of the posterior portion further forms a lateral notch on a lateral side of the spinal implant, the lateral notch being lateral and anterior to the second posterior point of the leading edge on the lateral side of the spinal implant; and wherein the medial notch and the lateral notch are configured to reduce the likelihood of tissue compression against a nerve root once the spinal implant is implanted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A spinal implant comprising:
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a superior surface and an inferior surface opposite the superior surface, at least one of the superior surface and the inferior surface comprising a plurality of teeth on a medial side of the spinal implant and a plurality of teeth on a lateral side of the spinal implant; an anterior wall; a tool insertion point in the anterior wall that is positioned along a medial-lateral midline of the spinal implant; wherein the plurality of teeth on the medial side of the spinal implant each have a tooth edge at a peak of each tooth that is configured to contact a vertebral endplate; wherein the tooth edges of the plurality of teeth on the medial side of the spinal implant define a longitudinal axis of each tooth; wherein the longitudinal axes of the plurality of teeth on the medial side of the spinal implant are parallel with one another; wherein the plurality of teeth on the lateral side of the spinal implant each have a tooth edge at a peak of each tooth that is configured to contact the vertebral endplate; wherein the tooth edges of the plurality of teeth on the lateral side of the spinal implant define a longitudinal axis of each tooth; wherein the longitudinal axes of the plurality of teeth on the lateral side of the spinal implant are parallel with one another; wherein the longitudinal axes of the plurality of teeth on the medial side of the spinal implant meet at the medial-lateral midline with corresponding longitudinal axes of the plurality of teeth on the lateral side of the spinal implant. - View Dependent Claims (16, 17, 18)
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19. A spinal implant comprising:
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a body for holding graft material therein; a superior surface and an inferior surface opposite the superior surface, at least one of the superior surface and the inferior surface comprising a plurality of teeth on a medial side of the spinal implant and a plurality of teeth on a lateral side of the spinal implant; an anterior wall; a tool insertion point in the anterior wall that is positioned along a medial-lateral midline of the spinal implant, the tool insertion point comprising an anterior surface of the anterior wall having a recessed rectangular slot with a cylindrical opening extending from a recessed surface of the recessed slot to a posterior surface of the anterior wall; wherein the plurality of teeth on the medial side of the spinal implant each have a tooth edge at a peak of each tooth that is configured to contact a vertebral endplate; wherein the tooth edges of the plurality of teeth on the medial side of the spinal implant define a longitudinal axis of each tooth; wherein the longitudinal axes of the plurality of teeth on the medial side of the spinal implant are parallel with one another and at a non-ninety degree angle with the medial-lateral midline of the spinal implant; wherein the plurality of teeth on the lateral side of the spinal implant each have a tooth edge at a peak of each tooth that is configured to contact the vertebral endplate; wherein the tooth edges of the plurality of teeth on the lateral side of the spinal implant define a longitudinal axis of each tooth; wherein the longitudinal axes of the plurality of teeth on the lateral side of the spinal implant are parallel with one another and at a non-ninety degree angle with the medial-lateral midline of the spinal implant; and wherein the longitudinal axes of the plurality of teeth on the medial side of the spinal implant intersect at the medial-lateral midline with corresponding longitudinal axes of the plurality of teeth on the lateral side of the spinal implant so as to form V-shaped or U-shaped intersections. - View Dependent Claims (20)
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Specification