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Biomechanical comparison of cervical fixation via transarticular facet screws without rods versus lateral mass screws with rods

Authors
 Seong Yi  ;  Dae-Cheol Rim  ;  Ki-Se Nam  ;  Sang-Hyun Keem  ;  Judith A. Murovic  ;  Jesse Lim  ;  Jon Park 
Citation
 WORLD NEUROSURGERY, Vol.83(4) : 548-552, 2015 
Journal Title
 WORLD NEUROSURGERY 
ISSN
 1878-8750 
Issue Date
2015
MeSH
Aged ; Biomechanical Phenomena ; Bone Screws* ; Cadaver ; Cervical Vertebrae/surgery* ; Female ; Fracture Fixation, Internal/methods* ; Humans ; Male ; Middle Aged ; Rotation ; Zygapophyseal Joint/surgery*
Keywords
Biomechanical stability ; Cadaver ; Cervical spine ; Lateral mass screw ; Material testing machine ; Rod fixation ; Transarticular facet screw
Abstract
OBJECTIVE: Transarticular facet screws restore biomechanical stability to the cervical spine when posterior cervical anatomy has been compromised. This study compares the more recent, less invasive, and briefer transarticular facet screw system without rods with the lateral mass screw system with rods. METHODS: For this study, 6 human cervical spines were obtained from cadavers. Transarticular facet screws without rods were inserted bilaterally into the inferior articular facets at the C5-C6 and C5-C6-C7 levels. Lateral mass screws with rods were inserted bilaterally at the same levels using Magerl's technique. All specimens underwent range of motion (ROM) testing by a material testing machine for flexion, extension, lateral bending, and axial rotation. RESULTS: Both fixation methods, transarticular facet screws without rods and lateral mass screws with rods, reduced all ROM measurements and increased spinal stiffness. No statistically significant differences between the 2 stabilization methods were found in ROM measurements for 1-level insertions. However, in 2-level insertions, ROM for the nonrod transarticular facet screw group was significantly increased for flexion-extension and lateral bending. CONCLUSIONS: Transarticular facet screws without rods and lateral mass screws with rods had similar biomechanical stability in single-level insertions. For 2-level insertions, transarticular facet screws without rods are a valid option in cervical spine repair.
Full Text
http://www.sciencedirect.com/science/article/pii/S1878875014013795
DOI
10.1016/j.wneu.2014.12.008
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Yi, Seong(이성)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/141151
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