Highly lordosed fusion cage
First Claim
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1. An implant configured to be implanted into an intervertebral space between first and second vertebrae, the implant comprising:
- a first component having;
proximal and distal ends that are spaced from one another along a first direction;
first and second sides that are spaced from one another along a second direction, perpendicular to the first direction; and
a first inner surface and a first outer surface that are spaced from one another along a third direction, perpendicular to both the first and second direction, the first outer surface configured to grip one of the first and second vertebrae, wherein the first component defines a through hole that extends from the first outer surface to the first inner surface along the third direction, and the first component further defines a recess that extends into the first inner surface with respect to the third direction and terminates between the first inner surface and first outer surface, the recess further extending through the first and second sides along the second direction; and
a second component having a pair of sides that are spaced from one another along the second direction, and having a second inner surface configured to face the first component along the third direction, the second component having a projection that extends between the sides of the pair of sides along the second direction such that the projection has a maximum length along the second direction, a maximum height along the third direction, and a maximum width along the first direction, the maximum length being greater than the maximum height and the maximum width, and the projection being configured to mate with the recess when the second component is coupled to the first component.
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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.
1254 Citations
23 Claims
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1. An implant configured to be implanted into an intervertebral space between first and second vertebrae, the implant comprising:
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a first component having; proximal and distal ends that are spaced from one another along a first direction; first and second sides that are spaced from one another along a second direction, perpendicular to the first direction; and a first inner surface and a first outer surface that are spaced from one another along a third direction, perpendicular to both the first and second direction, the first outer surface configured to grip one of the first and second vertebrae, wherein the first component defines a through hole that extends from the first outer surface to the first inner surface along the third direction, and the first component further defines a recess that extends into the first inner surface with respect to the third direction and terminates between the first inner surface and first outer surface, the recess further extending through the first and second sides along the second direction; and a second component having a pair of sides that are spaced from one another along the second direction, and having a second inner surface configured to face the first component along the third direction, the second component having a projection that extends between the sides of the pair of sides along the second direction such that the projection has a maximum length along the second direction, a maximum height along the third direction, and a maximum width along the first direction, the maximum length being greater than the maximum height and the maximum width, and the projection being configured to mate with the recess when the second component is coupled to the first component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implant configured to be implanted into an intervertebral space between first and second vertebrae, the implant comprising:
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a first component having proximal and distal ends that are spaced from one another along a first direction, a first pair of sides that are spaced from one another along a second direction, perpendicular to the first direction, and a first inner surface and a first outer surface that are spaced from one another along a third direction, perpendicular to both the first and second directions, the first outer surface configured to grip one of the first and second vertebrae, the first component defining a through hole that extends through the first inner and first outer surfaces, and the first component further defining a recess that extends into the first inner surface with respect to the third direction and terminates between the first inner surface and first outer surface; and a second component having proximal and distal ends that are spaced from one another along the first direction, a second pair of sides that are spaced from one another along the second direction, and a second inner surface and a second outer surface that are spaced from one another along the third direction, the second inner surface facing the first inner surface, and the second outer surface configured to grip another one of the first and second vertebrae, the second component defining a through hole that extends through the second inner surface and the second outer surface, wherein the implant further comprises a projection that has a maximum length along the second direction that is greater a maximum width and maximum height of the projection along the first direction and third directions, respectively, and the projection being configured to be received by the recess, the projection including a ramped surface that defines an incline with respect to the first and second inner surfaces as the projection extends along the first direction. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An implant configured to be implanted into an intervertebral space between first and second vertebrae, the implant comprising:
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a first component having proximal and distal ends that are spaced from one another along a first direction, a first pair of sides that are spaced from one another along a second direction, perpendicular to the first direction, and a first inner surface and a first outer surface that are spaced from one another along a third direction, perpendicular to both the first and second directions, the first outer surface configured to grip one of the first and second vertebrae, the first component defining a through hole that extends through the first inner and first outer surfaces, and the first component further defining a recess that extends into the first inner surface with respect to the third direction and terminates between the first inner surface and first outer surface; and a second component having proximal and distal ends that are spaced from one another along the first direction, a second pair of sides that are spaced from one another along the second direction, and a second inner surface and a second outer surface that are spaced from one another along the third direction, the second inner surface facing the first inner surface, and the second outer surface configured to grip another one of the first and second vertebrae, the second component defining a through hole that extends through the second inner surface and the second outer surface, wherein the implant further comprises a projection that is elongate along the second direction and configured to be received by the recess, the projection including a ramped surface that defines an incline with respect to the first and second inner surfaces as the projection extends along the first direction, and the projection including respective proximal and distal ends that are opposite one another along the first direction, the ramped surface extending from the respective proximal end of the projection to the respective distal end of the projection. - View Dependent Claims (21, 22, 23)
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Specification