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is is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms. ©2019 Published by Scientific Scholar on behalf of Surgical Neurology International Letter to the Editor

Polyaxial pedicle screw dislocation during screw tightening for posterior spinal lumbar stabilization