Journal of spinal disorders & techniques
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J Spinal Disord Tech · Apr 2008
Randomized Controlled TrialThe effect of meperidine-impregnated autogenous free fat grafts on postoperative pain management in lumbar disc surgery.
Prospective, randomized, double-blind clinical study. ⋯ In this study, we helped patients, who underwent 1-level, first-time lumbar microdiscectomy have a postoperative pain-free and comfortable period by using epidural meperidine-impregnated AFFGs.
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J Spinal Disord Tech · Apr 2008
Controlled Clinical TrialFacet joint orientation in spondylolysis and isthmic spondylolisthesis.
The orientation of facet joints (FJs) in a normal population and isthmic spondylolisthesis (IS) population was assessed using magnetic resonance imaging in the lumbar spine. ⋯ Relative coronal FJO in the lumbar spine may be the phenotypic expression of the familial etiology of IS. This may result in increased stress concentration in the pars between or below coronally oriented FJs. These more coronal FJOs in IS may also explain the common observation of retrolisthesis at L4/5 above IS when the L4/5 disc degenerates, lateral overhang of the L4/5 FJ to the L5 pedicle entry point above an IS, and the rare combination of DS at L4/5 and IS at L5/S1 when both disorders are separately common. This latter observation can be explained by the observation that DS occurs in those individual with sagittal lumbar facets, and that IS occurs in those with more coronal FJs.
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J Spinal Disord Tech · Apr 2008
Increasing bending strength and pullout strength in conical pedicle screws: biomechanical tests and finite element analyses.
Comparative in vitro biomechanical study and finite element analysis. ⋯ Conical screws effectively increased the bending strength and pullout strength simultaneously. The finite element analyses reliably predicted the results of the mechanical tests.
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J Spinal Disord Tech · Apr 2008
Higher risk of adjacent segment degeneration after floating fusions: long-term outcome after low lumbar spine fusions.
We report the long-term outcome after mono-segmental and bisegmental fusions at the lumbar L4-S1 region of the spine. ⋯ We conclude that floating fusions of single low lumbar segments are more likely to result in ASD and are negatively influenced by sagittal plane abnormalities.
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J Spinal Disord Tech · Apr 2008
Prevalence of lumbar total disc replacement candidates in a community-based spinal surgery practice.
This study was a retrospective record review of consecutive lumbar surgical patients seen by one surgeon in a private, community setting over a 15-month period. ⋯ This study suggests that in a community-based spinal surgery practice setting, only 14% of fusion patients, and only 5% of all lumbar surgery patients, would be TDR candidates. Furthermore, of those potential TDR candidates, as many as 66% might be expected to have their underlying condition related to a claim of a compensable work-related injury.