Spine
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This anatomic study tested placement of C2 pedicle screws using cadaver specimens. ⋯ The present anatomic study suggests that transpedicular screw fixation may be performed safely in the C2 pedicle by using the second technique. Using the first technique is not safe.
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A retrospective study was done in 12 teenagers with severe L5-S1 spondylolisthesis surgically treated with a single-stage posterior procedure for reduction, posterior interbody fusion, and segmental instrumentation. ⋯ Intraoperative distraction appears to be truly effective in reducing severe lumbosacral olyshtesis in children. Posterior interbody fusion (and eventual sacral dome osteotomy) successfully combines the goals of solid fusion with the requirements of root decompression. No neurologic problems were seen as a consequence of distraction. The solidity of the posterior segmental pedicle instrumentation combined with the anterior strut graft eliminate the need for postoperative casting.
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This retrospective study analyzed the clinical and radiologic results of two groups of patients with unstable burst fractures of the thoracolumbar spine treated with anterior decompression, reduction of the kyphotic deformity, and stabilization by grafting and instrumentation. ⋯ The double rod instrumentation performs significantly better regarding loss of correction compared with the single rod instrumentation.
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Axial traction to correct spinal deformity is a very old concept. The oldest reference available is in ancient Hindu mythological epics (written between 3500 BC and 1800 BC) where it is mentioned how Lord Krishna corrected the hunchback of one of his devotees. Later, Hippocrates (460 BC to 377 BC) described certain devices. ⋯ Controlled axial traction has been the keystone of several modern procedures such as Cotrel traction, Halo traction, and Harrington Outrigger instrumentation, etc. It appears that the primitive ways of application of axial traction by crude methods did not totally vanish but have been modified. In Indian tribal areas, bone setters still practice it in modified form.