VERTEBRAL ANCHORING DEVICE AND DEVICE FOR LOCKING SAME ONTO A POLYAXIAL SCREW

摘要

The invention concerns a vertebral anchoring device comprising a connector (2), a linking rod (10) a polyaxial anchoring screw (3) including a spherical head (15) and a threaded body (16) whereof the outer diameter d at the top of the thread teeth (17) is greater than that of the outer diameter a of the spherical head (15), each connector (2) consisting of a connecting element (4) including vertical branches (5, 6) delimiting a U-shaped opening (7), and a locking clip (8) provided with a pressure screw (9) for locking in the base of the U the linking rod (10), said connecting element (4) being perforated in its middle part with a vertical bore (11) for receiving opposite the opening (7) a locking device (19) consisting of a ring (20) and a threaded socket (21) for fixing and positioning the connector on the spherical head (15) of the anchoring screw (3).