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. 2018 Jan 30;8(6):570–578. doi: 10.1177/2192568217745068

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (http://www.creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 8. — Sagittal plane rotations of head and C1 to C7 vertebrae around their respective centers of gravity for load 1.5g relative to T4. Note that the curve for the implanted model (green) overlaps the “AS No Fracture” curve. AS, ankylosing spondylitis.