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Matthew J. Grosso, Roy Hwang, Thomas Mroz, Edward Benzel and Michael P. Steinmetz

T he normal lordotic curvature of the cervical spine is critical to maintaining sagittal alignment and spinal balance. 9 , 17 , 18 The reversal of normal cervical curvature, as seen in kyphosis, can occur through a variety of mechanisms and can lead to mechanical pain, neurological dysfunction, and functional disabilities. 1 , 2 , 4 , 11 , 12 When patients present with sufficient symptomatic deformity, surgical intervention may be warranted. It is believed that the neurological symptoms seen in cervical kyphosis are a result of deformity

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surveys than NONOP (p<0.05). OP and NONOP had similar coronal alignment (p<0.05). OP had worse sagittal spinopelvic alignment for all measures than NONOP except cervical lordosis, TK and pelvic incidence (PI). OP had greater percentage of pure sagittal classification (type S; OP=23%, NON=14%; p<0.05). OP had worse grades for all modifier categories: PT (26% vs 16%), PI-lumbar lordosis mismatch (37% vs 21%) and global sagittal alignment (29% vs 9%), OP vs NONOP, respectively (p<0.05). Conclusion: Prospective analysis of OP vs NONOP treated ASD patients demonstrated

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-0684 American Association of Neurological Surgeons 10.3171/2017.3.FOC-DSPNabstracts 2017.3.FOC-DSPNABSTRACTS Charles Kuntz Scholar Award Presentations (Abstracts 104–123) 119. Laminoplasty vs. Laminectomy-Fusion for the Treatment of Cervical Myelopathy: Preliminary Results from the CSM-Study Comparing Cervical Sagittal Alignment and Clinical Outcomes Vijay Ravindra , MD, MSPH , Jill Curran , MS , Praveen V. Mummaneni , MD , Adam S. Kanter , MD , Erica Fay Bisson , MD, MPH , Robert F. Heary , MD

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thoracolumbar spine describes a subset of fractures with posterior ligamentous complex disruption in response to a flexion and distraction moment imparted to the thoracolumbar spine. These injuries are mechanically and neurologically unstable and surgical stabilization is frequently necessary to prevent neurological deterioration and maintain sagittal alignment. Conventionally, open posterior fixation and fusion have been utilized as the standard surgical treatment. Recently, percutaneous techniques with pedicle screws insertion are becoming popular as they provide

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Background/Introduction: Transforaminal lumbar interbody fusion (TLIF) has become a popular surgical option to complement posterolateral fusion (PLF) for treatment of degenerative spinal conditions. Purported advantages of TLIF over PLF alone include enhanced fusion rates, improved sagittal alignment, and direct decompression of the neuroforamen. Earlier studies have examined these issues and yielded inconclusive results. Another often suggested advantage, that TLIF provides superior immediate stability and protects against early pedicle screw loosening, has never been

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30; p<0.001). Conclusions The addition of PPI seems to have a protective effect on the development of PJK. The analysis controlled for preoperative sagittal alignment as well as for correction of PI-LL. HYB was effective in restoring sagittal global alignment and cMIS in maintaining it. Neurosurg Focus Neurosurgical Focus FOC 1092-0684 American Association of Neurological Surgeons 2014.3.FOC-DSPNABSTRACTS Abstract Mayfield Clinical Science 243. Microendoscopic Decompression for Cervical Spondylotic Myelopathy

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deformation of non-operative spine fractures and identify predictive variables of angular change. Summary of Background Data Loss of normal sagittal alignment of the spine is a common sequela following thoracolumbar injuries. Patients treated non-operatively are especially at risk; however knowledge of the natural history of these injuries and predictors of deformation over time remains limited. Methods Patients with thoracolumbar fractures were identified via a trauma database. The angular change about the fracture site was determined comparing initial CT

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, Eric Massicotte , MD, MSc , and Michael Fehlings , MD, PhD (Toronto, Canada) 8 2015 123 2 History of Craniotomy, Cranioplasty, and Perioperative Care A493 A493 Copyright held by the American Association of Neurological Surgeons. You may not sell, republish, or systematically distribute any published materials without written permission from JNSPG. 2015 Introduction There is evidence that cervical sagittal alignment and spinal cord MRI hyperintensity correlate with disease severity in CSM patients. The impact of spinal