CPC A61B 17/7086 (2013.01) [A61B 17/708 (2013.01); A61B 17/7085 (2013.01); A61B 17/7052 (2013.01)] | 18 Claims |
1. An extender tower configured to couple to a bone anchor, the extender tower comprising:
an outer tower body extending along a longitudinal axis from a proximal portion to a distal portion, the tower body comprising:
first and second deflectable arms at the distal portion configured to engage with a housing of a bone anchor;
first and second ramp-locks located on the first and second deflectable arms, respectively;
a threaded portion located at the proximal portion;
first and second deflectable prongs extending alongside the first deflectable arm; and
third and fourth deflectable prongs extending alongside the second deflectable arm;
a cap configured to engage the threaded portion;
a first inner slide comprising a first coupling portion configured to engage the cap and a first window configured to engage the first ramp-lock; and
a second inner slide comprising a second coupling portion configured to engage the cap and a second window configured to engage the second ramp-lock;
wherein the cap can be rotated to:
move the first and second inner slides to engage the first and second ramp-locks to push the first and second deflectable arms outward; and
move the first and second inner slides to engage the first and second ramp-locks to prevent outward movement of the first and second deflectable arms.
|