A spinal stabilization system having a pedicle screw which includes (i) a shaft with external threads and a head segment on one end of the shaft； (ii) a first drive socket positioned in the head segment； (iii) a second drive socket on a shaft end opposite the first drive socket； and (iv) wherein the shaft end opposite the first drive socket has a lesser diameter than the shaft end at the head segment. The system further includes an intervertebral stabilization structure having an elongated body with rotating ring segments attached to each end of the elongated body.
