Abstract: A spinal fixation system for use in securing a spinal rod to a vertebra using a lockable bone screw connector. The connector is configured to be movably connected to the head of a bone screw, and a spinal rod can then be used to physically connect a first vertebra to a second vertebra. The spinal fixation system includes a tool grasping the connector by a locking and/or unlocking instrument that can allow the connector to lock to the bone screw by moving a collet, while the connector can still move along the spinal rod until locked into place by a set screw. The connector can be selectively unlocked from the bone screw for adjustment or removal.

Abstract: A low profile spinal fixation system for use in securing a spinal rod to a vertebra using a lockable bone screw connector. The connector is configured to be removably connected to the head of a bone screw, and a spinal rod can then be used to physically connect a first vertebra to a second vertebra. The spinal rod is locked to the bone screw by use of a compressible upper collet.

Abstract: A modular spinal fixation screw capable of rapid linear engagement of a bone screw and a rod member. The fixation screw is coupled to a connector formed from a clamp and a collet. The collet incorporates the use of a T-shaped living hinge which facilitates both attachment of the connector to a bone screw and lessens the resistance of the collet for locking to the bone screw and rod member. The collet further includes scallops that facilitates the insertion of the spherical end of the bone screw into the collet. The clamp can be moved from a first unlocked position used for installation to a locked position securing the rod member to a pedicle bone. The clamp compresses the collet which holds the hold rod member to the bone screws in a pre-selected position by linear movement of the clamp.