Anterior Transdiscal Axial Screw Fixation for Subaxial Cervical Backbone: A Biomechanical Examine.
World Neurosurg. 2018 Feb;110:e459-e464
Authors: Zheng M, Ji W, Zou L, Huang Z, Zhu Q, Qu D
OBJECTIVE: To judge stability of anterior transdiscal axial screw (ATAS) fixation for anterior instrumentation and to match with commonplace anterior cervical decompression and fusion and plate (ACDFP) fixation in human subaxial cervical backbone.
METHODS: Flexibility checks have been performed on 7 cadaveric specimens (C5-T1) in an intact and injured state and instrumented with ACDFP fixation, ATAS fixation, and ACDFP plus ATAS fixation on the C6-7 section after part of the anterior and posterior longitudinal ligaments and discectomy. A pure second of ±2.zero N-m was utilized to the specimen in flexion-extension, lateral bending, and axial rotation. Vary of movement (ROM) and impartial zone have been calculated for the C6-7 section.
RESULTS: ROM was decreased considerably in contrast with the intact or injured situation for three configurations beneath all motions. ATAS fixation resulted in comparable ROM in C6-7 in contrast with ACDFP fixation in flexion (2.7° vs. 2.6°, P = zero.419), extension (2.7° vs. 2.1°, P = zero.152), and lateral bending (four.6° vs. four.2°, P = zero.295) however bigger ROM in axial rotation (6.1° vs. 5.three°, P = zero.014). When mixed with an anterior plate, ATAS fixation decreased ROM to 1.2° in flexion, 1.1° in extension, three.three° in lateral bending, and three.eight° in axial rotation, which have been considerably smaller than ACDFP or ATAS fixation alone.
CONCLUSIONS: ATAS fixation is a biomechanically efficient various or supplemental methodology of anterior fixation in subaxial cervical backbone.
PMID: 29133006 [PubMed – indexed for MEDLINE]