Highly lordosed fusion cage
First Claim
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1. An intervertebral fusion cage, comprising:
- a) a first component having an outside surface configured to engage an upper vertebral endplate, an interior surface opposite the outside surface along a first direction, and a tapered first distal end, wherein the first component defines a recess that extends into the interior surface toward the outside surface;
b) a second component having first and second opposed surfaces that are opposite each other along the first direction, and a second distal end, wherein the second component includes a projection that extends from the first surface along the first direction away from the second surface,wherein the first surface is slidable along the interior surface in a second direction perpendicular to the first direction such that the second distal end travels toward the tapered first distal end until the projection is received in the recess so as to impede the first surface from further sliding along the interior surface in the second direction, andwherein the projection defines first and second ends that are offset from each other a linear distance along a third direction that is greater than each of a height of the projection along the first direction and a width of the projection along the second direction, and the third direction is perpendicular to each of the first and second directions.
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Abstract
A fusion cage has a first component that defines an outside surface that is configured to engage a vertebral endplate, and an interior surface. The fusion cage has a second component that defines first and second opposed surfaces. One of the first and second opposed surfaces can mate with the interior surface of the first component. The fusion cage can include vertical and lateral throughholes adapted to enhance fusion.
352 Citations
30 Claims
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1. An intervertebral fusion cage, comprising:
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a) a first component having an outside surface configured to engage an upper vertebral endplate, an interior surface opposite the outside surface along a first direction, and a tapered first distal end, wherein the first component defines a recess that extends into the interior surface toward the outside surface; b) a second component having first and second opposed surfaces that are opposite each other along the first direction, and a second distal end, wherein the second component includes a projection that extends from the first surface along the first direction away from the second surface, wherein the first surface is slidable along the interior surface in a second direction perpendicular to the first direction such that the second distal end travels toward the tapered first distal end until the projection is received in the recess so as to impede the first surface from further sliding along the interior surface in the second direction, and wherein the projection defines first and second ends that are offset from each other a linear distance along a third direction that is greater than each of a height of the projection along the first direction and a width of the projection along the second direction, and the third direction is perpendicular to each of the first and second directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An intervertebral fusion cage, comprising:
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a) a first component having a first outside surface and a first interior surface that faces opposite the first outside surface, a first outer surface that extends from the first outside surface to the first interior surface, and a second outer surface opposite the first outer surface along a first direction, wherein the second outer surface extends from the first outside surface to the first interior surface, and the first interior surface extends from the first outer surface to the second outer surface; and b) a housing component having a second outside surface configured to engage a vertebral endplate and a second interior surface that faces opposite the second outside surface, a first sidewall extending from the second interior surface and away from the second outside surface, and a second sidewall extending from the second interior surface and away from the second outside surface, wherein the first side wall is opposite the second side wall along the first direction, wherein the first component is configured for insertion into the housing component such that an entirety of the first interior surface is disposed between the first and second sidewalls with respect to the first direction, and the first interior surface abuts the second interior surface. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification