Spine
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The pretension of the Dynesys cord was varied to evaluate its effects on both tissue responses and screw-spacer behaviors by the finite-element method. ⋯ 4.
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Retrospective cohort study using Thomson Reuter's MarketScan database. ⋯ 2.
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Comparative Study
What is the incidence of dysphagia after posterior cervical surgery?
Prospective comparative study. ⋯ Both anterior and posterior cervical surgery may result in long-term dysphagia in a small number of patients, perhaps due to loss of motion or postoperative pain. Surgeons should counsel their patients about possibility for dysphagia prior to all cervical spine surgery.
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Feasibility study on the acquisition of lumbar spine kinematic data from upright magnetic resonance images obtained under heavy load carrying conditions. ⋯ Superior and inferior lumbar levels showed different kinematic behaviors under heavy load carrying conditions. These findings suggest a postural, lumbar flexion strategy aimed at centralizing a heavy posterior load over the base of support.