Spine
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Multicenter Study Comparative Study
Fixation points within the main thoracic curve: does more instrumentation produce greater curve correction and improved results?
Prospective consecutive multicenter case series. ⋯ Absolute curve correction improved most with all pedicle screw and screw and wire constructs, but, when compared to bending films, the number of fixation points is more important than fixation type for curve correction. Although SRS scores improved the most in those with all screw constructs, the significance of this improvement is uncertain, and the SRS scores did not relate to whether curve correction was more or less than the bend films.
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Systematic review. ⋯ Strong.
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Multicenter Study
Risk factors for medical complication after lumbar spine surgery: a multivariate analysis of 767 patients.
Multivariate analysis of prospectively collected registry data. ⋯ Risk factors identified in this study can be beneficial to clinicians and patients alike when considering surgical treatment of the lumbar spine. Future analyses and models that predict the occurrence of medical complication after lumbar spine surgery may be of further benefit for surgical decision making.
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A cross-sectional study. ⋯ A 28-item QOL scale specifically targeting patients with LSS was developed, and its reliability and validity were confirmed.
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Biomechanics of human intervertebral discs before and after nucleotomy. ⋯ Nucleotomy alters the internal radial and axial AF strains in the neutral position, which may leave the AF vulnerable to damage and microfractures. In bending, the effects of nucleotomy were minimal, likely due to more of the applied load being directed over the AF. Some of the nucleotomy effects are modulated by degeneration, where the mechanical effect of nucleotomy was magnified in degenerated discs and may further induce mechanical damage and degeneration.