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Juan S. Uribe, Armen R. Deukmedjian, Praveen V. Mummaneni, Kai-Ming G. Fu, Gregory M. Mundis Jr., David O. Okonkwo, Adam S. Kanter, Robert Eastlack, Michael Y. Wang, Neel Anand, Richard G. Fessler, Frank La Marca, Paul Park, Virginie Lafage, Vedat Deviren, Shay Bess and Christopher I. Shaffrey

O ver the past several decades, surgical treatment options for adult spinal deformity (ASD) have expanded, including both minimally invasive and open techniques. 3 , 12 , 14 , 18 , 27 Determining the most suitable approach in patients should take into account the risks and benefits of each surgical technique. Unfortunately, studies comparing the different operative techniques are lacking. Moreover, outcomes and complications of ASD are largely reported in terms of patient characteristics following traditional open techniques with little published data

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Taemin Oh, Justin K. Scheer, Robert Eastlack, Justin S. Smith, Virginie Lafage, Themistocles S. Protopsaltis, Eric Klineberg, Peter G. Passias, Vedat Deviren, Richard Hostin, Munish Gupta, Shay Bess, Frank Schwab, Christopher I. Shaffrey and Christopher P. Ames

A dult spinal deformity (ASD) is a pathological condition defined as spinal malalignment in the axial, coronal, or sagittal plane and is derivative of congenital, iatrogenic, degenerative, or idiopathic etiology. 30 The restoration of sagittal alignment, as established by the sagittal vertical axis (SVA; target < 5 cm) and pelvic tilt (PT; target < 20°) on sagittal radiography, is important in surgical deformity correction. 6 , 21 , 22 Although coronal plane correction also has clinical relevance, sagittal corrections appear to have greater importance, 5

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, MD, PhD 3 2017 42 3 Peripheral Nerve A10 A11 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. 2017 Introduction: The purpose of this study is to evaluate the efficacy and safety of cervical total disc replacement (TDR) for symptomatic adjacent segment degeneration (ASD) with previous anterior cervical discectomy and fusion (ACDF) was done, compared to ACDF in the treatment of cervical ASD