The invention relates to instruments for fixing at least two spinal vertebrae by pedicle screw bone anchoring implants (2) and elements for posterior or posterolateral connection. Said device (1) comprises at least one bone anchoring element (2) to be fixed to a vertebra, pre-mounted with a disposable assembly tube, and a sealed sterile packaging. The invention also relates to a kit of instruments for inserting or removing a spinal implant, comprising at least two threaded bone anchoring elements (2), a rod-type or plate-type connecting element mechanically connecting the bone anchoring elements (2), and blocking elements for locking the connecting element in position in relation to the anchoring elements, in order to perform all of the surgical manipulations relating to the insertion or removal of said implant. The invention is characterised in that all of said required instruments are disposable and packed in a sterile manner in at least one sealed packaging.
