Spine
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An in vivo rat model of transient cervical nerve root compression. ⋯ Results imply a force threshold exists less than 10 gf for persistent pain symptoms following transient cervical nerve root compression. Findings also suggest that spinal glial activation may be related to behavioral sensitivity and may modulate cervical nerve root mediated pain.
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Clinical Trial
Instrumented transforaminal lumbar interbody fusion with bioresorbable polymer implants and iliac crest autograft.
Twenty-seven patients underwent instrumented transforaminal lumbar interbody fusion (TLIF) procedures using bioresorbable implants as interbody spacers. The greater than 2-year clinical and radiographic results of this series are presented along with as a review of relevant preclinical and preliminary clinical studies of bioresorbables. ⋯ Bioresorbable implants have significant potential for use in spine surgery. This potential is realized in this first published clinical series using bioresorbable implants as interbody spacers with a minimum follow-up of 2 years, significantly exceeding the biologic "life expectancy" (12-18 months) of the implant material. Both the clinical and radiographic results of this study support the use of interbody devices manufactured from bioresorbable polymers for structural interbody support in the TLIF procedure.
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Comparative Study
Paraspinal electromyography: age-correlated normative values in asymptomatic subjects.
Cross-sectional study. ⋯ The amount of lumbar paraspinal muscle denervation does increase with age. Understanding the range of findings in asymptomatic subjects will help us interpret lumbar paraspinal needle electromyography findings in patients with spinal disorders.
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Review article of current knowledge of animal models used in the investigations of fusionless scoliosis surgery. ⋯ Fusionless scoliosis surgery offers theoretical advantages over brace treatment and surgery. Like bracing, fusionless treatments preserve growth, motion, and function of the spine. Like surgery, these treatments offer substantial correction of deformity. However, minimally invasive fusionless scoliosis surgery is less extensive than fusion surgery and may avoid adjacent segment degeneration and other complications related to fusion. Additional investigations are required to identify optimal implant strategies, to evaluate the effects of these implants of the spine and surrounding structures, and to define the appropriate patient population for these interventions.
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Prospective cohort study. ⋯ The Bryan artificial cervical disc provided in vivo functional spinal motion at the operated level, reproducing the preoperative kinematics of the spondylotic disc.