[Halo instrumentation for the correction and immobilization of the cervical spine].

An instrument set for application in patients requiring a correction treatment and/or a temporary fixation of the cervical spine is described. The halo is combined with a cast or a brace employing the 8 mm Hoffmann External Fixator system supplemented by three additional, newly designed parts. Applications of the instrument set in the treatment of traumatic fracture, fibrous dysplasia and ankylosing spondylitis are described.