Various exemplary embodiments relate to a distractor system including one or more of the following: a distraction screw comprising a double threaded distal portion and a nonthreaded locking feature near a proximal end of the distraction screw a crossbar a first arm coupled to the crossbar a second arm coupled to the crossbar and having an interior bore sized to receive at least a portion of the distraction screw and a lock having a nonthreaded aperture sized to receive at least a portion of the distraction screw therethrough, wherein the lock is configurable in a first position and a second position, when configured in the first position the lock engages the locking feature to substantially inhibit axial movement of the distraction screw within the interior bore, and when configured in the second position the lock substantially permits axial movement of the distraction screw within the interior bore.
