Spinal cage having deployable member
First Claim
Patent Images
1. A spinal cage assembly, comprising:
- a spinal cage having a structure suitable to maintain two vertebrae separate from each other and having an interior having at least some empty space defined by an internal surface,said spinal cage having at least one screw hole suitable to receive a bone screw directed through an external surface of said spinal cage and having a screw hole axis aimed, in a direction along said screw hole from an exterior of said spinal cage toward said interior of said spinal cage, so as to point partially away from said spinal cage in a longitudinal direction;
a spin-plate engageable with said spinal cage and rotatable with respect to said spinal cage, wherein when said spin-plate is in an undeployed position, said spin-plate covers at least a portion of said screw hole, and when said spin-plate is in a deployed position, said spin-plate covers none of said screw hole or less of said screw hole than when said spin-plate is in said undeployed position; and
wherein said spinal cage comprises a first feature suitable to receive a first end of a shaft of said spin-plate and comprises a second feature suitable to receive a second end of said shaft of said spin-plate, wherein said first feature is a first internal groove within said internal surface and said second feature is a second internal groove within said internal surface, said second internal groove being opposed to said first internal groove.
8 Assignments
0 Petitions
Accused Products
Abstract
A spinal cage with a wall extending in a longitudinal direction defining an interior space is disclosed. There is also provided a deployable element in movable relation to the spinal cage. In some embodiments, there is a rib, and the rotatable member is engaged at one end with the wall and at the other end with the rib. In some embodiments, the spinal cage is provided with holes for screws that can be directed at adjacent vertebrae for fixation. Such a spinal cage can be used with the spin-plate or with the screws. The screws and the spinal cage may have features that cooperate to prevent back-out of the screws.
-
Citations
20 Claims
-
1. A spinal cage assembly, comprising:
-
a spinal cage having a structure suitable to maintain two vertebrae separate from each other and having an interior having at least some empty space defined by an internal surface, said spinal cage having at least one screw hole suitable to receive a bone screw directed through an external surface of said spinal cage and having a screw hole axis aimed, in a direction along said screw hole from an exterior of said spinal cage toward said interior of said spinal cage, so as to point partially away from said spinal cage in a longitudinal direction; a spin-plate engageable with said spinal cage and rotatable with respect to said spinal cage, wherein when said spin-plate is in an undeployed position, said spin-plate covers at least a portion of said screw hole, and when said spin-plate is in a deployed position, said spin-plate covers none of said screw hole or less of said screw hole than when said spin-plate is in said undeployed position; and wherein said spinal cage comprises a first feature suitable to receive a first end of a shaft of said spin-plate and comprises a second feature suitable to receive a second end of said shaft of said spin-plate, wherein said first feature is a first internal groove within said internal surface and said second feature is a second internal groove within said internal surface, said second internal groove being opposed to said first internal groove. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 20)
-
-
15. A spinal cage comprising:
-
a wall having an internal surface and an external surface, both extending vertically and generally parallel to a vertical axis of said spinal cage and progressing circumferentially, wherein said external surface forms a closed circumference, and wherein said internal surface forms a closed perimeter defining an interior space; wherein said internal surface comprises at least a first internal groove within said internal surface, said groove extending vertically at least approximately parallel to said vertical axis; wherein said first internal groove has two respective side walls opposed to each other and generally parallel to each other, said two respective side walls defining a groove width therebetween, said first internal groove having a groove base surface connecting between said side walls; wherein at a first vertical end of said first internal groove, said side walls extend as far as said wall extends vertically; wherein at an opposed vertical end of said first internal groove, said side walls connect with a curved surface within said internal surface, said curved surface defining a cylindrical space within said internal surface having a cylindrical diameter; wherein said cylindrical diameter is greater than said groove width and said cylindrical space is centered midway between said side walls; and at least one screw hole suitable to receive a bone screw directed through said external surface of said wall and having a screw hole axis aimed, in a direction along said screw hole from an exterior of said spinal cage toward said interior space of said spinal cage, so as to point partially away from said spinal cage in a longitudinal direction. - View Dependent Claims (16, 17, 18, 19)
-
Specification