Stand alone interbody spinal system
An embodiment includes an orthopedic fusion system comprising: a cage; a curved first channel coupling a lateral wall of the cage to a superior surface of the cage; a curved second channel coupling the lateral wall of the cage to an inferior surface of the cage; a third channel coupling the superior surface of the cage to the inferior surface of the cage; a curved first anchor configured to slide within the first channel; a curved second anchor configured to slide within the second channel; and a resilient member comprising a resilient first arm that projects across a portion of the first channel and a resilient second arm that projects across a portion of the second channel. Other embodiments are described herein.
1 . An orthopedic fusion system comprising:
a cage;
a curved first channel coupling a lateral wall of the cage to a superior surface of the cage;
a curved second channel coupling the lateral wall of the cage to an inferior surface of the cage;
a third channel coupling the superior surface of the cage to the inferior surface of the cage;
a curved first anchor to slide within the first channel, the first anchor including: (a) a threaded orifice, and (b) a projection to abut a wall of the first channel to prevent a proximal portion of the first anchor from passing through the first channel;
a curved second anchor to slide within the second channel; and
first and second arms that are monolithic with each other;
wherein in an implanted orientation: (a) the first and second arms collectively at least partially obstruct the first and second channels, and (b) a portion of the first arm is lateral to at least a portion of the first anchor and prevents the first anchor from backing out of the first channel.
2 . The system of claim 1 , wherein:
in the implanted orientation the first anchor does not deflect the first arm away from the first channel
in an implantation orientation the first anchor directly deflects the first arm away from the first channel to allow the first anchor to pass within the first channel.
3 . The system of claim 2 comprising an insertion tool, the insertion tool comprising:
a first lever to travel along a first arcuate path to drive the first anchor along the first channel;
a second lever to travel along a second arcuate path to drive the second anchor along the second channel.
4 . The system of claim 1 , wherein in a vertical plane in the implanted orientation the first anchor is completely surrounded by an interior wall of the first channel.
5 . The system of claim 4 , wherein the first and second anchors are identical in physical form with each other and are interchangeable with one another.
6 . The system of claim 4 , wherein the first anchor includes a rail that projects from a side wall of the first anchor and which traverses a majority of a length of the first anchor.
7 . The system of claim 6 wherein a horizontal axis intersects the lateral wall and the first and second channels.
8 . The system of claim 4 wherein:
the first anchor includes an arcuate outer wall defining an arc that extends along a length of the first anchor;
the arc has a single consistent radius of curvature.
9 . The system of claim 1 comprising a threaded withdrawal tool to couple to the threaded orifice.
10 . The system of claim 1 comprising a withdrawal tool, the withdrawal tool comprising a threaded rod to deflect the first arm before coupling to the threaded orifice.
11 . The system of claim 1 comprising a withdrawal tool, the withdrawal tool comprising a withdrawal tool arm to travel along an arcuate path and couple to the threaded orifice.
12 . The system of claim 11 , wherein the withdrawal tool is to deflect the first arm before coupling to the threaded orifice.
13 . An orthopedic fusion system comprising:
a cage;
a first channel coupled to a lateral wall of the cage and projecting superiorly;
a second channel coupled to the lateral wall of the cage and projecting inferiorly;
a third channel coupling a superior surface of the cage to an inferior surface of the cage;
a curved first anchor to slide within the first channel, the first anchor including a threaded orifice;
a curved second anchor to slide within the second channel; and
resilient first and second arms coupled to one another;
wherein in an implanted orientation: (a) the resilient first and second arms collectively at least partially obstruct the first and second channels, and (b) a portion of the first arm is lateral to at least a portion of the first anchor.
14 . The system of claim 13 comprising a threaded withdrawal tool to couple to the threaded orifice.
15 . The system of claim 14 , wherein the withdrawal tool is to deflect the first arm before coupling to the threaded orifice.
16 . The system of claim 13 comprising:
a fourth channel coupling the lateral wall of the cage to the superior surface of the cage; and
a third anchor to slide within the fourth channel.
17 . The system of claim 13 , wherein in a vertical plane in the implanted orientation the first anchor is completely surrounded by an interior wall of the first channel.
18 . The system of claim 17 comprising a withdrawal tool, the withdrawal tool comprising a withdrawal tool arm to travel along an arcuate path to withdraw the first anchor from the first channel.
19 . The system of claim 13 comprising an insertion tool, the insertion tool comprising:
a first insertion tool arm to travel along a first arcuate path to drive the first anchor along the first channel;
a second insertion tool arm to travel along a second arcuate path to drive the second anchor along the second channel.
20 . The system of claim 13 comprising an insertion tool, the insertion tool comprising:
a first lever to travel along a first arcuate path to drive the first anchor along the first channel;
a second lever to travel along a second arcuate path to drive the second anchor along the second channel.