VERTEBRAL OSTEOSYNTHESIS EQUIPMENT

摘要

This equipment includes - bony anchoring members, such as pedicular screws (1) or hooks, whereof at least one comprises a proximal threaded stud (6) intended for receiving a nut (4) and a base portion (7) intended for anchoring to a vertebra ; -one or two linking rods (2), intended to be connected to these anchoring members and to be attached to the vertebrae, - parts (3) for connecting these linking rod to these anchoring members, and - extension pieces (5) intended for engaging on the proximal stud(s) of the anchoring member(s) for running down connecting parts (3) on this or these proximal stud(s) until they rest on the proximal zone(s) (17) of the base portion(s) (7) of the anchoring members. The proximal stud (6) and the extension piece (5) include positioning means (12, 32) enabling to position the extension piece (5) on the free end of the proximal stud (6), concentrically thereto.