Zero profile spinal fusion cage
First Claim
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1. An intervertebral fusion device comprising:
- a first component having i) a proximal component end, ii) a distal component end opposite the proximal component end along a proximal-distal direction, iii) a first outer surface that extends between the proximal and distal component ends, and is positioned and configured to contact a vertebral endplate, iv) a through hole that extends through the first outer surface and adapted to promote vertebral fusion through the first component, and v) a first translation surface extending between the proximal component end and the distal component end and oriented at an oblique angle to the first outer surface;
a rail component having i) a proximal rail end, ii) a distal rail end, iii) a second outer surface that extends between the proximal and distal rail ends, iv) a hole extending distally from an opening in the proximal rail end, and v) a second translation surface that is oriented at an oblique angle to the second outer surface; and
a threaded screw disposed within the hole of the rail component,wherein the first and second outer surfaces are configured to be substantially coplanar with each other when the rail component is movable with respect to the first component along the proximal-distal direction so as to cause the first and second translation surfaces to translate upon each other.
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Abstract
An interbody fusion cage having upper and lower canals for receiving the heads of bone screws that have been pre-installed in opposing vertebral body endplates. In certain embodiments, the interbody fusion cage can include a main interbody device having a guide surface canal, and a rail component configured to slidingly engage the guide surface canal.
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Citations
30 Claims
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1. An intervertebral fusion device comprising:
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a first component having i) a proximal component end, ii) a distal component end opposite the proximal component end along a proximal-distal direction, iii) a first outer surface that extends between the proximal and distal component ends, and is positioned and configured to contact a vertebral endplate, iv) a through hole that extends through the first outer surface and adapted to promote vertebral fusion through the first component, and v) a first translation surface extending between the proximal component end and the distal component end and oriented at an oblique angle to the first outer surface; a rail component having i) a proximal rail end, ii) a distal rail end, iii) a second outer surface that extends between the proximal and distal rail ends, iv) a hole extending distally from an opening in the proximal rail end, and v) a second translation surface that is oriented at an oblique angle to the second outer surface; and a threaded screw disposed within the hole of the rail component, wherein the first and second outer surfaces are configured to be substantially coplanar with each other when the rail component is movable with respect to the first component along the proximal-distal direction so as to cause the first and second translation surfaces to translate upon each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An intervertebral fusion device comprising:
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a first component having i) a proximal component end, ii) a distal component end disposed such that the proximal and distal component ends are opposite each other along a proximal-distal direction, iii) a first outer surface that extends between the proximal and distal component ends, iv) a through hole extending through the first outer surface, and v) a first translation surface that is oblique to the first outer surface as it extends along the proximal-distal direction; a rail component having i) a proximal rail end, ii) a distal rail end disposed such that the proximal and distal rail ends of the rail component are opposite each other along the proximal-distal direction, iii) a second outer surface that extends between the proximal and distal rail ends, wherein the second outer surface is parallel to the first outer surface, iv) a hole extending into the proximal rail end, and v) a second translation surface extending in a proximal-distal direction and oriented oblique to the second outer surface; and a screw having a threaded shaft that that extends into the hole of the rail component, wherein the first and second translation surfaces are translatable upon each other along the proximal-distal direction. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An intervertebral fusion device comprising:
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a first component having i) a proximal component end, ii) a distal component end disposed such that the proximal and distal component ends are opposite each other along a proximal-distal direction, iii) a first outer surface disposed between the proximal and distal component ends, and oriented substantially along a first plane, iv) a hole extending through the first outer surface, and v) a first pair of translation surfaces extending along the proximal-distal direction, wherein
1) the first pair of translation surfaces are non-parallel to the first plane, and aligned with each other in a respective plane that is parallel to the first plane;a rail component having i) a proximal rail end, ii) a distal rail end, iii) a second outer surface disposed between the proximal rail end and the distal rail end, iv) a hole that extends into the proximal rail end, and v) a second pair of translation surfaces that are monolithic with each other and, extend in the proximal-distal direction, are non-parallel to the first plane, and are spaced from each other in a respective plane that is parallel to the first plane; and a screw having a threaded shaft, the screw extending through the hole of the rail component, wherein the first and second pairs of translation surfaces are translatable upon each other as the rail component moves with respect to the first component along the proximal-distal direction. - View Dependent Claims (25, 26, 27, 28)
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29. An intervertebral fusion device comprising:
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a first component having i) a proximal component end, ii) a distal component end opposite the proximal component end along a proximal-distal direction, iii) an outer surface that extends between the proximal and distal component ends, and is positioned and configured to contact a vertebral endplate, iv) a through hole that extends through the outer surface and adapted to promote vertebral fusion through the first component, v) first and second translation surfaces that extend between the proximal component end and the distal component end, and are non-parallel with the outer surface; a rail component having i) a proximal rail end, ii) a distal rail end spaced from the proximal rail end, iii) a hole extending distally from an opening in the proximal rail end, and iv) third and fourth translation surfaces that extend between the proximal rail end and the distal rail end, and are non-parallel with the outer surface; and a threaded screw that extends into the hole of the rail component, wherein the rail component is translatable with respect to the first component along the proximal-distal direction, which causes
1) the first and third translation surfaces to translate upon each other, and
2) the second and fourth translation surfaces to translate upon each other,wherein the first translation surface is monolithic with the second translation surface, the third translation surface is monolithic with the fourth translation surface, the first and second translation surfaces are aligned with each other along a direction that is oriented substantially parallel to the outer surface, and the third and fourth translation surfaces are aligned with each other along the direction that is oriented substantially parallel to the outer surface. - View Dependent Claims (30)
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Specification