Spine
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Morphologic study of 500 human adult atlases, 256 atlases of nonhuman adult primates representing 37 genera, and 25 human atlases of newborns and young individuals from birth to 3 years of age. ⋯ The anteriorly unclosed transverse foramen of the atlas seems to be the result of an evolutionary tendency characteristic of hominoids within primates and could be interpreted as a shared derived character (i.e., synapomorphy) and as the persistence in adults of a juvenile pattern (i.e., paedomorphosis). It must not be interpreted as a pathologic erosion or destruction but as being a simple normal variant.
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Randomized Controlled Trial Comparative Study
A prospective, randomized, blinded, single-site study to evaluate the clinical and radiographic differences between frozen and freeze-dried allograft when used as part of a circumferential anterior lumbar interbody fusion procedure.
Prospective, randomized clinical trial from a single surgeon's patient population. ⋯ When the results are considered in terms of clinical outcomes, the 2 methods of graft preservation perform with few statistically significant differences. Radiographic analysis showed that the freeze-dried graft had a higher likelihood of pseudarthrosis.
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An anatomic study conducted on cadaveric specimens. ⋯ S2 iliac technique is a potential option for distal fixation in spine surgery. Biomechanical and clinical data are required to fully evaluate the potential of this technique.
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A morphometric analysis, using magnetic resonance imaging (MRI) studies of the lumbar spine. ⋯ The safe corridor for performing the discectomy and inserting the intervertebral cage narrows from L1-L2 to the L4-L5 level. This corridor is further narrowed with rotatory deformity of the spine. Using the preoperative MRI to assess the relative position of the adjacent neuro-vascular structures in relation to the lower vertebra's endplate at each level is recommended.
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Comparative Study
Use of walking data in assessing operative results for cervical spondylotic myelopathy: long-term follow-up and comparison with controls.
Retrospective case-control study. ⋯ Surgical decompression is beneficial in the treatment of CSM. Improvements were generally seen by 6 months from operation. Older patients and greater degrees of myelopathy were not associated with a worse outcome, suggesting surgery should not necessarily be discouraged in such patients.