1/3. Partial lumbosacral kyphosis reduction, decompression, and posterior lumbosacral transfixation in high-grade isthmic spondylolisthesis: clinical and radiographic results in six patients.BACKGROUND: In an attempt to increase fusion while decreasing the neurologic risk associated with complete reduction of high-grade spondylolisthesis, the authors have used a technique of partial lumbosacral kyphosis reduction, posterior decompression, and pedicle screw transfixation of the lumbosacral junction. OBJECTIVE: To determine if this technique is effective in treatment of high-grade spondylolisthesis. STUDY DESIGN: A retrospective review of six patients with high-grade spondylolisthesis treated by this technique was performed. There were four female patients (ages 16 years [n=2], 23 years [n=1], and 29 years [n=1]) and two male patients (both 13 years of age) with spondylolisthesis ranging from Grade IV to Grade V. All patients presented with pain and radiculopathy. After surgery the patients were evaluated for resolution of symptoms, sagittal alignment, fusion, and satisfaction. The radiographic measurements included the slip angle, the percentage slip, and the sacral inclination. An SRS outcome score was also obtained on all six patients to evaluate postoperative outcome, in terms of pain control, self-image perception, and return to function. RESULTS: The average length of follow-up was 42.6 months (range 24-60 months). All patients evidenced solid fusion by the 6-month follow-up (based on oblique radiographs showing lateral bridging bone masses). The slip angle was improved from 62 degrees to 28 degrees (P < 0.5), whereas there was no significant improvement in the percentage slip or the sacral inclination (89-80% and 28-37 degrees, respectively). No progression of the slip angle or percentage slip was noted on the follow-up radiographs. Complications included two intraoperative dural tears that were identified and repaired. There were no neurologic complications. The SRS outcome instrument demonstrated good postoperative pain control, function, self-image, and satisfaction in all patients. CONCLUSION: In high-grade spondylolisthesis, this posterior approach is safe and effective in obtaining a solid arthrodesis, restoring sagittal balance, and improving function. These results reinforce the impression that it is the partial reduction of the slip angle, not the percentage slip, in high-grade spondylolisthesis that is important in obtaining optimal results.- - - - - - - - - - ranking = 1keywords = spondylolisthesis (Clic here for more details about this article) |
2/3. Novel bioabsorbable interbody fusion spacer-assisted fusion for correction of spinal deformity.OBJECT: The authors report the cases of 12 patients with medically refractory mechanical low-back pain and intermittent radicular symptoms in whom radiography demonstrated evidence of multilevel lumbosacral degenerative kyphotic and scoliotic deformity and spondylolisthesis. methods: These patients underwent multilevel posterior lumbar interbody fusion in which Macropore bioabsorbable spacers were placed. Each patient underwent at least 1 year of clinical and radiographic follow up. CONCLUSIONS: This series illustrates the novel use of bioabsorbable interbody spacers and fusion technique for correction of spinal deformity due to advanced degenerative kyphoscoliosis and spondylolisthesis.- - - - - - - - - - ranking = 0.2keywords = spondylolisthesis (Clic here for more details about this article) |
3/3. Severe spondylolisthesis. Reduction and internal fixation.The authors have developed and algorithm for management of spondylolysis and spondylolisthesis. Since March 1983, 15 patients with an average age of 20 years and with greater than 50% anterior displacement have been treated. The mean follow-up period is 24 months. Before surgery the average anterior displacement was 72%, the average delta angle at L5-S1 representing kyphosis was 73 degrees, and the average lumbar lordosis from L1 to L5 was 64 degrees. An anterior release and fusion was combined with a posterior reduction and instrumentation using the internal fixator. Correction of the anterior displacement averaged 46%, while the kyphosis was corrected a mean of 20 degrees and the lordosis a mean of 12 degrees. The L4 segment was preserved in 13 cases and the L4-L5 angle was improved by a mean of 7 degrees. Postoperative pain and function were improved in all cases. Neurologic complications occurred in four patients, three permanent and one temporary. Hardware failure occurred in two patients, and reoperation has been required in one. Further follow-up evaluation of this technique is required.- - - - - - - - - - ranking = 0.5keywords = spondylolisthesis (Clic here for more details about this article) |