[Study of dorsal erection osteotomy in kyphosis].

Presented is a procedure for the correction of the juvenile kyphosis and the kyphotic false posture upon spondylitis ankylopoietica. Upon spine dissects the extraction and outbreak force of screws and screw pairs dorsally brought into the vertebral body were measured. It has been showed that the pedicle screws tolerate very high extraction forces upon sagittal and right-angle stress as well. The correction of the juvenile kyphosis upon rigid kyphosis and the correction by lordosing the thoraco-lumbar transition upon patients with a spondylitis ankylopoietica is clinically possible with good results.