Lateral mass fixation in subaxial cervical spine: anatomic review

Global Spine Journal
Elrahmany MohamedAbo-Elw Haitham

Abstract

Introduction The cervical spine is a highly mobile segment of the spinal column, liable to a variety of diseases and susceptible to trauma. It is a complex region where many vital structures lie in close proximity. Lateral mass screw fixation has become the method of choice in stabilizing subaxial cervical spine among other posterior cervical fixation techniques whenever the posterior elements are absent or compromised. Objective This study examined cervical specimens of cadavers and cervical computed tomography (CT) scans to minimize as much as possible complications of cervical lateral mass screw placement such as vertebral artery or nerve root injuries, facet joint violations, or inadequate placement. Methods Forty normal cervical CT scans, obtained from the emergency unit as part of the trauma workup, were included in this study plus 10 cervical cadaveric specimens obtained from the Alexandria Neuro-anatomy laboratory. There were three fixed parameters for screw insertion in this study. First, the point of screw insertion was the midpoint of the lateral mass; it was the crossing point between the sagittal and axial planes of the posterior cortex of the lateral mass. Second, the direction of the screw in the craniocaudal pla...Continue Reading

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Citations

Jan 24, 2019·Clinical Spine Surgery : a Spine Publication·Gregory D SchroederAlexander R Vaccaro
Apr 5, 2021·Clinical Neurology and Neurosurgery·Stephanie M CasilloNima Alan
Nov 28, 2021·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Kohei MoritaYuichi Murayama

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