Spine
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Randomized Controlled Trial
Efficacy of epidural perineural injections with autologous conditioned serum for lumbar radicular compression: an investigator-initiated, prospective, double-blind, reference-controlled study.
Prospective, double-blind, reference-controlled, investigator-initiated, single center. ⋯ ACS is an encouraging treatment option for patients with unilateral lumbar radicular compression. The decrease in pain was pronounced, clinically remarkable, and potentially superior to steroid injection.
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Comparative Study
A biomechanical investigation of vertebroplasty in osteoporotic compression fractures and in prophylactic vertebral reinforcement.
Cadaveric single vertebrae were used to evaluate vertebroplasty as a prophylactic treatment and as an intervention for vertebral compression fractures. ⋯ Results suggest that augmentation of the vertebrae postfracture significantly increases failure load, while stiffness is not restored. Prophylactic augmentation was seen to increase failure strength in comparison to the predicted failure load. Stiffness appears to be maintained suggesting that prophylactic vertebroplasty maintains stiffness better than vertebroplasty postfracture.
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Translation, cross-cultural adaptation and psychometric testing of self-report outcome measurements. ⋯ The results of this study indicate that the Brazilian-Portuguese versions of the FRI and RMDQ are reliable and valid instruments for the measurement of disability in Brazilian-Portuguese-speaking patients with LBP presenting for physiotherapy treatment. Both instruments are suitable for use in clinical practice and research studies.
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Comparative Study
A comparison of fatigue failure responses of old versus middle-aged lumbar motion segments in simulated flexed lifting.
Survival analysis techniques were used to compare the fatigue failure responses of elderly motion segments to a middle-aged sample. ⋯ Younger motion segments survive considerably longer when exposed to similar spine loading conditions that simulate repetitive lifting in neutral and flexed torso postures, primarily associated with the increased bone mineral content possessed by younger motion segments. Cycles to failure of young specimens at 22.5 degrees flexion were similar to that of older specimens at 0 degrees flexion, and survivorship of young specimens at 45 degrees flexion was similar to the older cohort at 22.5 degrees.
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Technical note. ⋯ We present a technique for controlled extension osteotomy correction of chin-on-chest deformity in a prone position. Use of the operating table mechanism in conjunction with a closing-wedge osteotomy diminishes the risk of translation, decreases risk of air embolus associated with a sitting position, and promotes greater opportunity for fusion through the osteotomy, and the stability allows for placement of modern instrumentation.