Set of instruments for the percutaneous stabilization of the spine with the aid of pedicle screws and rods

摘要

The invention relates to an instrument set for percutaneous stabilization of the spinal column using rods (8) and pedicle screws (1) that have a screw head (3) and a screw shank (4) and a distally open recess (13) for receiving a rod (8), with a screw manipulator (2) through which a central cavity (11) passes axially and which comprises a cylindrical sleeve (20) and a slide (24), whereinthe wall of the cylindrical sleeve (20) is divided into two first wall segments (27) by two diametrically opposite and axially extending windows (26) which open out in the proximal end face of the sleeve (20),the proximal ends of the first wall segments (27) form grip elements (28) which, during a screw manipulation, receive between them at least a longitudinal portion of the screw head (3), andthe slide (24) is displaceable in the axial direction on the sleeve (20) and is connected to the first wall segments (27) such that it secures these against moving radially apart at least in a proximal end position (E) of displacement.