We treated 17 patients who had chronic low back pain and/or neurologic deficit due to spondyotisthesis with Diaposon system at the Orthopaedics and Traumatology Department of Gülhane Military Medical Academy be-tween January 1989 and May 1994. We applied decompression, reduction and fusion to the patients with and av-erage of 38. We externally supported the patients with body cast in first 3 months postoperativeiy. Average follow-up was 18 months and ali of the complaints of the patients were ceased at the postoperative period. We do be-lieve in the necessity of reduction in order to obtain the mechanical axis of spinal column in spondytoiisthesis cas-es.
Keywords: Spondylolisthesis, surgical treatment, reduction.