Abstract: A spinal cage with a wall extending in a longitudinal direction defining an interior space is disclosed. There is also provided a deployable element in movable relation to the spinal cage. In some embodiments, there is a rib, and the rotatable member is engaged at one end with the wall and at the other end with the rib. In some embodiments, the spinal cage is provided with holes for screws that can be directed at adjacent vertebrae for fixation. Such a spinal cage can be used with the spin-plate or with the screws. The screws and the spinal cage may have features that cooperate to prevent back-out of the screws.