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01-03-2014 | Original Article

Reciprocal changes in cervical spine alignment after corrective thoracolumbar deformity surgery

Authors: Yoon Ha, Frank Schwab, Virginie Lafage, Gregory Mundis, Christopher Shaffrey, Justin Smith, Shay Bess, Christopher Ames

Published in: European Spine Journal | Issue 3/2014

Abstract

Purpose

To identify changes in cervical alignment parameters following surgical correction of thoracolumbar deformity and then assess the preoperative parameters which induce changes in cervical alignment following corrective thoracolumbar deformity surgery.

Methods

A retrospective study of 49 patients treated for thoracolumbar deformity with preoperative planning of an acceptably aligned coronal and sagittal plane in each case. We compared cervical spine parameters in two distinct low [preoperative C7 sagittal vertical axis (SVA) ≤6 cm] and high (preoperative C7 SVA ≥9 cm) C7 SVA groups. Multilinear regression analysis was performed and revealed the relationship between postoperative cervical lordosis and preoperative spinopelvic parameters and surgical plans.

Results

In the lower C7 SVA group, cervical lordosis was significantly increased after thoracic/lumbar deformity correction (p < 0.01). In contrast, the high C7 SVA group showed decreased cervical lordosis postoperatively (p < 0.01). Multilinear regression analysis demonstrated the preoperative parameters (preoperative C2–7 angle, T1 slope, surgical plan for PT and C7 SVA), which determine the postoperative cervical lordosis.

Conclusion

In spinal deformity procedures, preoperative spinal alignment parameters, and surgical plans could affect postoperative cervical spine alignment.

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Title: Reciprocal changes in cervical spine alignment after corrective thoracolumbar deformity surgery
Authors: Yoon Ha
Frank Schwab
Virginie Lafage
Gregory Mundis
Christopher Shaffrey
Justin Smith
Shay Bess
Christopher Ames
Publication date: 01-03-2014
Publisher: Springer Berlin Heidelberg
Published in: European Spine Journal / Issue 3/2014
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-013-2953-8

At a glance: The STEP trials

Springer Medicine

Reciprocal changes in cervical spine alignment after corrective thoracolumbar deformity surgery

Abstract

Purpose

Methods

Results

Conclusion

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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