Abstract: The drilling device for forming an osseous channel (2) with a curved profile (2b) via a straight cannula (6) previously fixed in the body of a vertebra (3) with a cortical plateau (4) of a spinal segment (Sr) of a vertebral column (Cv) includes a guide pin (8) which is provided from a guide pin kit and has at one of its ends a curved profile (8a) of which the radius of curvature R is less than 20 millimetres, and a sharpened tip (8b) arranged in a direction defined by an angle Y which is less than 90 degrees to the longitudinal axis of said pin, the profile of said guide pin (8) making it possible to define, after insertion thereof into the body of the vertebra (3), two contact points a and b ensuring the guidance of the free end of an articulated drill bit (10) so as to position said free end in a direction substantially perpendicular to that of the cortical plateau (4) of the vertebra (3) to be drilled.

Abstract: The device for protecting adjacent stages Vc of a spinal segment Sr of a vertebral column previously instrumented by an osteosynthesis device (1) is constituted of fixation elements (110) formed of connectors (111) immobilized in translation and in rotation on the corresponding connection rod (4) of osteosynthesis device (1), a support block (130; 180) in which is housed the spinous process Ve of superjacent vertebra Vc found just above the instrumented spinal segment Sr and at least one ligament (150, 170, 190) allowing spinous process Ve of superjacent vertebra Vc to be joined to support block (130; 180) and the support block (130; 180) to be joined to connectors (111).

Abstract: A vertebral anchoring device includes connectors (2) linked to one another by connecting rods (3) and fixed on bone-anchoring screws (5) implanted in the vertebrae (4) of a vertebral column, each connector (2) being composed of a connection element (6) that includes receiving and fixing members to permit immobilization of the connecting rod (3) in translation and in rotation. Each connection element (6) includes, opposite the members for receiving and fixing the connecting rod (3), a seat (12) that cooperates with a connecting device (17) permitting assembly of the anchoring screw (5). The connecting device (17), before immobilization of the connecting rod (3) in the connection element (6), permits lateral and independent tilting movements of the connection element (6) and of the anchoring screw (5) relative to each other, and rotation of the anchoring screw (5) for fixing it in the body of the vertebra (4).