One stage lumbar spinal osteotomy in ankylosing spondylitis with immediate correction and fixation with two narrow dynamic compression plates and pedicular screws

ABSTRACT

Six patients with flexion deformity of the spine due to ankylosing spondylitis were treated with a one stage spinal osteotomy through the lumbar spine. All patients were males. The average age was 25.33 +/- 2.16 years. The average pre-operative degree of deformity was 38 +/- 3.58 degrees. The deformity was corrected at the time of the surgery and the osteotomy was fixed internally with two dynamic compression platesand pedicular screws. The average correction angle was 32.83 +/- 2.32 degrees and the average time to union was 4.17 +/- 1.17. No neurological deterioration or aortic rupture occurred in any of the patients