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European Spine Journal

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01-07-2013 | Original Article

Does atlantoaxial dislocation influence the subaxial cervical spine?

Authors: Shenglin Wang, Peter G. Passias, Libin Cui, Gang Li, Ming Yan, Haitao Zhou, Chao Wang

Published in: European Spine Journal | Issue 7/2013

Abstract

Introduction

Previous studies have reported that the alignments of the occipital-cervical and subaxial spine were closely interrelated in asymptomatic individuals; however, none have focused on a population with atlantoaxial dislocation.

Material and methods

From 2007 to 2011, 298 patients with atlantoaxial dislocation and atlas occipitalization were studied. Angles formed between Occiput-C2 and C2–C7 were measured. The relationship between the alignment of the occipital-cervical junction and the subaxial cervical spine was evaluated.

Results

The range of values for the angles measured was as followed: the Occiput-C2 angles were −35.2° to 44.8°, and the C2–C7 angles were −17.4° to 77.8°. Statistically significant negative correlations were observed between the Occiput-C2 and C2–C7 angles.

Conclusion

Anterior dislocations of the atlas are associated with diminished lordosis or even kyphosis of the occipital-cervical junction, and result in compensatory hyperlordosis of the subaxial cervical spine, collectively presenting as a “swan neck” deformity. Atlantoaxial dislocation may influence the global cervical alignment.

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Title: Does atlantoaxial dislocation influence the subaxial cervical spine?
Authors: Shenglin Wang
Peter G. Passias
Libin Cui
Gang Li
Ming Yan
Haitao Zhou
Chao Wang
Publication date: 01-07-2013
Publisher: Springer Berlin Heidelberg
Published in: European Spine Journal / Issue 7/2013
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-013-2742-4

At a glance: The STEP trials

Springer Medicine

Does atlantoaxial dislocation influence the subaxial cervical spine?

Abstract

Introduction

Material and methods

Results

Conclusion

At a glance: The STEP trials

Springer Medicine

Abstract

Introduction

Material and methods

Results

Conclusion

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