[The problem of dorsal spondylodesis while using traction rods (author's transl)].

Functional and morphological disturbances of health at the vertebral column lead to instability, dislocation and reduction of intervertebral distance in the mobile segment. A safe therapy to remove these changes must aim at achieving three goals: 1. Re-establishment of stability 2. Repositioning of slipped disks and 3. Re-establishment of intervertebral distance. Especially in spondylolisthesis, results are often unsatisfactory. Even if dorsal traction rods are used, the intervertebral bodies will often slip due to uncoupling in the vertebral joints. This situation can be avoided by effecting together with the introduction of bone blocks. This procedure enables satisfactory repositioning, full restoration of intervertebral distance and permanent restoration of stability.