CPC A61F 2/447 (2013.01) [A61F 2/30771 (2013.01); A61F 2/4611 (2013.01); A61F 2002/30176 (2013.01); A61F 2002/30471 (2013.01); A61F 2002/30476 (2013.01); A61F 2002/30518 (2013.01); A61F 2002/30904 (2013.01); A61F 2002/30937 (2013.01); A61F 2002/4615 (2013.01)] | 21 Claims |
1. An expandable intervertebral spacer system, the spacer system comprising:
a) a top plate and a bottom plate forming a cage that has a proximal end, a distal end, a top, a bottom, and four sides;
b) a first ramp extending into the cage from the top or bottom of the cage;
c) a hinge connecting the top plate and bottom plate at the proximal end;
d) a stanchion at the distal end, the stanchion comprising a movable post having saw teeth and a stationary post having saw teeth; and
e) a torsion spring configured to bias the movable post against the stationary post, such that the movable post and stationary post cooperate to lock the top plate and bottom plate apart a desired distance.
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