Patent ID: 7766945

Claim:
A system useful in spinal corrective procedures, the system comprising: a bone screw; a housing; an insert; an elongated rod; a setscrew; the bone screw comprising; a threaded portion, and a head comprising a housing engaging surface and an insert engaging surface; the housing comprising; a bone facing surface and a top edge with at least one sidewall extending therebetween; a through hole extending from the top edge to the bone facing surface; at least a pair of opposing slots proximate the top edge; a screw head seating surface, the screw head seating surface shaped to cooperatively engage the housing engaging surface to allow polyaxial orientation of the bone screw relative to a vertical axis of the housing; and an inner surface comprising a groove, the through hole defining a first transverse inside dimension nearer the top edge and the groove defining a second transverse inside dimension smaller than the first transverse dimension further from the top edge; the insert comprising: a screw head engaging surface, the screw head engaging surface shaped to cooperatively engage the insert engaging surface to allow polyaxial orientation of the bone screw relative to a vertical axis of the housing; a rod rest shaped to seat a portion of the elongated rod, the rod rest aligning with the pair of opposing slots and a narrowed transition portion coupling the screw head engaging surface and the rod rest, the transition portion having narrower cross-sectional width than a maximum width of the screw head engaging surface, and the transition portion having narrower cross-sectional width than a maximum width of the rod rest shape, so as to allow the pedicle screw and the insert additional rotation; and at least one protrusion resiliently deflectable from a first position to a second position, the insert being passable axially into the through hole through the first traverse dimension and into the groove with the protrusion in the first position, and the insert being retained in the groove with the protrusion in the second position; wherein the elongated rod is seatable on the rod rest and securable by the setscrew.