Posterolateral lumbosacral fusion with transpedicular fixation - 63 consecutive cases followed for 4 (2-6) years

We analyzed the clinical, vocational and radiologic outcomes of 63 consecutive posterolateral lumbosacral fusions performed with transpedicular fixation. The indication for surgery was long-standing intractable lumbar and/or radiating pain with spondylolysis-olisthesis in 31 cases, degenerative disc disease and/or facet joint arthrosis in 23 cases and pain after laminectomy/decompression in 9 cases. Radiographic union was finally achieved in 30 out of the 63 cases. Fixation device-related complications, such as screw misplacement, breakage, bending and loosening, occurred in 33 cases. 15 patients underwent refusion. 43 patients obtained good pain relief. There was no correlation between bony healing and a good clinical outcome. 28/49 preoperatively employed patients returned to work. There was no correlation between relief of pain and return to work. 20 patients retired on a full disability pension. The clinical results were best in the spondylolysis-olisthesis group. Only 2/15 patients with markedly reduced spondylolisthesis maintained the reduction. In 3 patients, progressive disc degeneration above the level of fusion was observed. We conclude that posterolateral lumbosacral fusion with transpedicular fixation provides a satisfactory clinical outcome in patients with spondylolysis-olisthesis, but the high incidence of complications related to the fixation device in the other indications studied is a serious drawback of the method.