Spine
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A retrospective study. OBJECTIVE.: To decipher the incidence, characteristics, functional outcomes, and complications of spinal fusion after revision surgery for recurrent pseudarthrosis in adult patients with scoliosis. ⋯ Revision surgery for pseudarthrosis repair in adult scoliosis is most successful at attaining fusion when thoracolumbar and overall sagittal alignment are restored as much as possible.
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A retrospective review of lumbar total disc replacement (TDR) radiographs. ⋯ To be 95% certain that an implanted TDR prosthesis has any sagittal motion, a ROM of at least 4.6 degrees must be observed, which is the upper limit of intraobserver measurement variability for a TDR with a true ROM of 0 degrees. To be 95% certain that a change in TDR ROM has occurred between 2 measurements by the same observer, a change in ROM of at least 9.6 degrees must be observed (the entire range of +/-4.6 degrees intraobserver variability). ROM measurement variability should be considered when evaluating the success or failure of motion preservation in lumbar TDR.
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This is a report of a 12-year-old girl treated surgically for scoliosis associated with bilateral hip dislocation in Larsen syndrome. ⋯ A case of scoliosis associated with dislocated hips in a patient with Larsen syndrome was successfully treated with posterior correction surgery. Fusion surgery between T4 and L2 provided an ideal sagittal balance of the total spine, while preserving 4 lumbar mobile segments.
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A retrospective radiographic analysis of 47 intact cadaver pediatric cervical spines at the Hamann-Todd Osteology Collection in Cleveland, Ohio. ⋯ Our results showed an overall increase in the pedicle axis and pedicle width but no significant change in pedicle length. The data in this study indicate that pedicle screws may not be safe for use in the pediatric cervical spine, particularly younger children. The use of lateral mass screws was not specifically addressed in this study. As in the thoracolumbar spine, growth of the pedicles in relation to the spinal canal is lateral to the canal. The vertebral body itself appears to contribute most to overall pedicle axis growth, while the pedicle itself contributes a progressively smaller percentage over time.