Spine
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A retrospective study of patients who underwent 1-3-level kyphoplasty procedures at a single institute. ⋯ The majority of kyphosis correction by kyphoplasty is limited to the vertebral body treated. The majority of height gained after kyphoplasty occurs in the midbody. Higher correction over longer spans of the spine can be achieved with multilevel kyphoplasty procedures, in proportion to the number of levels addressed. Notwithstanding its well-published clinical efficacy, it is unrealistic to expect a 1 or 2-level kyphoplasty to improve significantly the overall sagittal alignment after VCFs.
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Multicenter Study Clinical Trial
Dynamic stabilization in addition to decompression for lumbar spinal stenosis with degenerative spondylolisthesis.
Prospective clinical study. ⋯ In elderly patients with spinal stenosis with degenerative spondylolisthesis, dynamic stabilization with the Dynesys system in addition to decompression leads to similar clinical results as seen in established protocols using decompression and fusion with pedicle screws. It maintains enough stability to prevent further progression of spondylolisthesis or instability. With the Dynesys system, no bone grafting is necessary, therefore, donor site morbidity can be avoided.
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Case Reports Multicenter Study
Neurologic deterioration secondary to unrecognized spinal instability following trauma--a multicenter study.
A retrospective study was undertaken that evaluated the medical records and imaging studies of a subset of patients with spinal injury from large level I trauma centers. ⋯ This multicenter study establishes that missed spinal injuries resulting in a neurologic deficit continue to occur in major trauma centers despite the presence of experienced personnel and sophisticated imaging techniques. Older age, high impact accidents, and patients with insufficient imaging are at highest risk.
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Biomechanical study of unembalmed human lumbar segments. ⋯ Tension on the lumbar fasciae simulating moderate contraction of TrA affects segmental stiffness, particularly toward the neutral zone.