Management of lumbosacral instability using oswestry pedicle screw system [OPSS]

ABSTRACT

The main presenting symptom in patients with lumbosacral instability was low back pain with or without leg pain. Fifty cases were prospectively studied after failure of significant improvement with medical treatment for a minimum period of six months in 25 cases with spondylolisthesis and three months in 25 cases with failed back surgery. The standard surgical procedure consisted of transpedicular fixation using Oswestry pedicular screw system and in situ posterolateral graft using autogenous iliac bone with or without decompression. After an average follow up of twenty months, the results obtained were quite satisfactory with an overall fusion rate of 74% and excellent or good clinical results of 82% including back and leg pain and spinal mobility. The results of the present study support the reliability of the segmental pedicular fixation of the Oswestry type combined with decompression and posterolateral grafting as a safe technique for management of cases with lumbosacral instability resulting in a satisfactory outcome without significant complications