Atlas (C1) lateral mass screw placement using the intersection between lateral mass and inferomedial edge of the posterior arch: a cadaveric study

Purpose To compare the Atlas (C1) lateral mass screw placement between screw trajectories of 0° and 15° medial angulation while using the intersection between lateral mass and inferomedial edge of the posterior arch. Methods Forty-eight Atlas lateral masses were prepared and divided into 2 groups: G...

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Bibliographic Details
Published in:European spine journal 2022-12, Vol.31 (12), p.3443-3451
Main Authors: Liawrungrueang, Wongthawat, Riew, K. Daniel, Sugandhavesa, Nantawit, Bunmaprasert, Torphong
Format: Article
Language:English
Subjects:
Atlanto-Axial Joint - surgery
Bone Screws
Bone surgery
Cadavers
Cervical Atlas - diagnostic imaging
Cervical Atlas - surgery
Computed tomography
Humans
Medical imaging
Medicine
Medicine & Public Health
Neurosurgery
Original Article
Orthopedics
Spinal Fusion
Surgical Orthopedics
Tomography, X-Ray Computed
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Summary:Purpose To compare the Atlas (C1) lateral mass screw placement between screw trajectories of 0° and 15° medial angulation while using the intersection between lateral mass and inferomedial edge of the posterior arch. Methods Forty-eight Atlas lateral masses were prepared and divided into 2 groups: Group 1; screws inserted at 3 mm lateral to the reference point with screw trajectory of 0° angulation( N  = 24) and Group 2; those inserted with screw trajectory of 15° medial angulation( N  = 24). We evaluated the atlas anatomy, screw purchase and the presence of any breaches using CT scan. Results The radiographic parameters for Groups 1 and 2 were found statistically different ( p -value 
ISSN:0940-6719
1432-0932
DOI:10.1007/s00586-022-07385-7