Spine
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Postoperative outcomes of cervical pedicle screw (CPS) placement were evaluated. The screws were inserted in degenerative vertebrae using anatomic landmarks. ⋯ The deviation rate of CPS placement using anatomic landmarks was higher than anticipated, although no serious complications were encountered. Refinement of the technique (e.g., using a computer-assisted navigation system) is strongly recommended.
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Comparative Study
Biomechanical changes at adjacent segments following anterior lumbar interbody fusion using tapered cages.
A biomechanical evaluation of anterior cages in a calf lumbar spine model. ⋯ Statistically significant changes in intradiscal pressures and motion were found at the adjacent levels following a single-level stand-alone ALIF procedure using paired LT cages.
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Randomized Controlled Trial Multicenter Study Comparative Study
Comparison of OP-1 Putty (rhBMP-7) to iliac crest autograft for posterolateral lumbar arthrodesis: a minimum 2-year follow-up pilot study.
A prospective, randomized, controlled, multicenter clinical study. ⋯ This study represents the first clinical trial to demonstrate the safety and similarity of OP-1 Putty as a replacement for autogenous bone graft in the posterolateral fusion environment with a minimum of 2-year follow-up. OP-1 Putty was able to achieve osteoinduction leading to a radiographically solid fusion in the absence of autogenous iliac crest bone graft in 55% of the patients at 24 and 36 months. These results compare favorably to the historical fusion rates reported for uninstrumented arthrodesis in this challenging clinical scenario.
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Randomized Controlled Trial Comparative Study
Predictors and modifiers of treatment effect influencing sick leave in subacute low back pain patients.
Modifying effects in multivariate analyses of a randomized controlled trial. ⋯ The spine clinic intervention seems to have a main effect on work absenteeism via interacting with the concerns of being unable to work.
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Comparative Study Clinical Trial
Temporary external transpedicular fixation of the lumbosacral spine: a prospective, longitudinal study in 330 patients.
In this study, 330 patients with incapacitating low back pain underwent temporary external transpedicular fixation (TETF) of the lumbosacral spine in a prospective trial. ⋯ In this heterogeneous group of chronic patients with low back pain, TETF of the spine (including a placebo trial) does not appear to be of value in selecting suitable candidates for spinal fusion.