ROD REDUCER ASSEMBLY

A system for spinal surgery comprises a pedicle screw assembly and a derotation sleeve mountable to the pedicle screw assembly. The pedicle screw assembly includes a screw securable to a spinal bone, a pedicle screw housing which is coupled to the screw and defines a rod-receiving recess, and an extension assembly coupled to the pedicle screw housing by a frangible member. The derotation sleeve is movable with the pedicle screw assembly to manipulate the spinal bone, and is configured to inhibit the frangible member from breaking while manipulating the spinal bone. In an embodiment, a rod reducer is mountable to the derotation sleeve and is configured to reduce a spinal rod into the rod-receiving recess of the pedicle screw. In an embodiment, the derotation sleeve has a locking member for securely engaging a locking feature of the extension assembly to prevent separation of the derotation sleeve from the pedicle screw assembly, and a proximal portion of the derotation sleeve is rotatable about a longitudinal axis of the derotation sleeve with respect to a distal portion of the derotation sleeve to move the locking member out of engagement with the locking feature. Sheet 6 of 26 i"A2" S"X" 322 "W" ,W-330 324a 324b "A2"