Journal of spinal disorders & techniques
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J Spinal Disord Tech · Jul 2008
Residual motion on flexion-extension radiographs after simulated lumbar arthrodesis in human cadavers.
Flexion-extension radiographs are commonly used to assess lumbar fusion. Recommended criteria for solid fusion have varied from 1 to 5 degrees of angular motion between vertebrae. Notwithstanding this wide variation, the validity of these criteria have never been biomechanically tested. ⋯ The amount of radiographically detectable flexion-extension motion with simulated fusions varies widely and seems to be influenced by fusion type. This study documents a range of measurable motion on flexion-extension radiographs after several types of simulated lumbar fusion. However, as the degrees of motion seemed to be high, future studies should use a fusion simulation other than metallic implants that more closely resembles bony arthrodesis.
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J Spinal Disord Tech · Jul 2008
Transvertebral Transsacral strut grafting for high-grade isthmic spondylolisthesis L5-S1 with fibular allograft.
A clinical retrospective study was conducted. ⋯ Treatment by this method showed improvement in lumbosacral kyphosis while avoiding the neurologic injury risk associated with open slip-reduction maneuvers. Despite no reduction in translational deformity, this technique offers excellent fusion results, good clinical outcomes, and prevents further sagittal translation and lumbosacral kyphosis progression.
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J Spinal Disord Tech · Jul 2008
Clinical results of intrapedicular partial pediculectomy for lumbar foraminal stenosis.
A retrospective case study of the use of intrapedicular partial pediculectomy (IPPP) to treat lumbar foraminal stenosis. ⋯ This follow-up study confirms that IPPP affords long-lasting improvements in leg symptoms for patients with lumbar foraminal stenosis.
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J Spinal Disord Tech · Jul 2008
Preservation of the nuchal ligament plays an important role in preventing unfavorable radiologic changes after laminoplasty.
Prospective study. ⋯ These results indicate that the preserved funicular section of the nuchal ligament attached both to the C6 and C7 spinous processes plays an important role in preventing undesirable radiologic changes after laminoplasty.
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J Spinal Disord Tech · Jun 2008
Controlled Clinical TrialEvolution of bone mineral density after percutaneous kyphoplasty in fresh osteoporotic vertebral body fractures and adjacent vertebrae along with sagittal spine alignment.
Prospective controlled cohort study of 27 adult osteoporotic patients who underwent kyphoplasty for fresh osteoporotic spinal fractures. ⋯ The observed 2-year evolution of vertebral endplate BMD, after kyphoplasty under stable global sagittal spinal balance, might contribute to the pathogenesis of new fractures in adjacent vertebra. However, other studies with control series and longer follow-up are necessary to show if these BMD changes are the result of vertebral augmentation or are merely natural history.