Fig. 1

Schematic illustrations demonstrate the surgical procedure to install Rocker. A customized detacher is used to partially dissect the paraspinous muscles of asymptomatic side (a). Properly sized pilot is inserted to ensure that the optimal distraction were achieved (b). Unlocked Rocker is folded to facilitate installation (c). When inserting between spinous processes, folded Rocker deploys and locks by itself (d)