Spine
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Comparative Study
Comparison of 3-dimensional spinal reconstruction accuracy: biplanar radiographs with EOS versus computed tomography.
Experimental study for systematic evaluation of 3-dimensional (3D) reconstructions from low-dose digital stereoradiography. ⋯ The EOS image acquisition and reconstruction software provides accurate 3D spinal representations of scoliotic spinal deformities. The results of this study provide spinal deformity surgeons evidence pertaining to this new upright 3D imaging technology that may aid in the clinical diagnosis and decision making for patients with scoliosis.
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Prospective, longitudinal single-cohort study of 28 patients with displaced sacral fractures treated with internal fixation. ⋯ A high rate of impairments was observed in this study; urinary and sexual problems deteriorated over time, whereas neurological deficits of the lower extremities and bowel function did not change. These severe problems should be addressed early in the rehabilitation period and the patients should be followed by adequate expertise for many years after the injury.
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We compared the sizes of the dural sac among conventional magnetic resonance imaging (MRI), axial loaded MRI, and upright myelography in patients with lumbar spinal canal stenosis (LSCS). ⋯ The axial loaded MRI demonstrated a significant reduction in the dural sac size and significant correlations of the dural sac diameters with the upright myelogram. Furthermore, the axial loaded MRI had higher sensitivity and specificity than the conventional MRI for detecting the severe constriction observed in the myelogram. Therefore, the axial loaded MRI can be used to represent positional changes of the dural sac size detected by the upright myelography in patients with LSCS.
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Comparative Study
Pullout analysis of a lumbar plate with varying screw orientations: experimental and computational analyses.
Experimental and finite element analysis of anterior lumbar interbody fixation (ALIF) plate pullout. ⋯ Significant difference was found between certain screw-angle configurations; however, when compared with simply placing the screws straight in, the difference was never more than 8%. This implies that there is greater freedom in the angle and placement of screws than previously thought. Our results show that there is little change in fixation strength when placing the screw in a different direction.