Spine
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Randomized Controlled Trial Multicenter Study Comparative Study
Sagittal alignment after Bryan cervical arthroplasty.
Prospective, randomized, Food and Drug Administration Investigational Device Exemption trial from one study site. ⋯ With the Bryan disc, there was an insignificant increase in lordosis of 0.9° at immediate postoperative time point. Overall cervical sagittal alignment is not different between the experimental and control populations. This prospective study does not demonstrate a clinically significant increase in segmental kyphosis after Bryan disc arthroplasty. Global cervical lordosis is statistically equivalent between arthroplasty and fusion groups at 2 years follow-up.
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Retrospective cohort analysis of prospectively collected data. ⋯ Properly selected patients 75 years of age and older can achieve substantial clinical improvements, based on patient reported HRQOL measures, 2 years after one- and two-level instrumented posterolateral lumbar arthrodesis.
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Observational study with three examiners. ⋯ The centroid method is more reliable for measuring scoliosis in AIS than the Cobb method, and it can substitute the Cobb method, which showed high variability.
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Cross-sectional study. ⋯ The previously reported assumption that changes in the alar ligaments detected on MRI are associated with pain and disability is not supported by this study. The diagnostic value and the clinical relevance of MR-detectable areas of high intensity in the alar ligaments remain questionable.