Biomechanical Study of the Pullout Resistance in Screws of a Vertebral Fixation System
Joint Authors
Zamarioli, Ariane
Shimano, Antonio Carlos
Aparecido Defino, Helton Luiz
Araujo, Cleudmar Amaral
Fakhouri, Sarah Fakher
Wichr, Célia R. G.
Source
Advances in Mechanical Engineering
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-10-15
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The purpose of this study was to investigate the effect of varying the outer diameter of screws of a vertebral fixation system by submitting them to mechanical tests and photoelasticity.
The pullout mechanical test was performed in 20 swine lumbar vertebrae, divided into two groups based on the screw outer diameter: 5.0 and 6.0 mm.
The maximal pullout strengths and stiffness were evaluated.
For the photoelasticity, eight models were used and divided into the same groups.
The maximal pullout strength was 974.12 ± 144.44 N in the 5.0 mm screws and 1537.42 ± 326.95 N in the 6.0 mm screws (P < 0.001).
The stiffness was 418.60 ± 62.58 103N/m in the 5.0 mm screws and 502.12 ± 133.45 103N/m in the 6.0 mm screws (P = 0.09).
The mean ± SD shear stress of the 5.0 mm screws was 12.90 ± 1.87 KPa and 11.99 ± 2.01 KPa for the 6.0 mm screws.
Thus, the 5.0 mm screw had lower pullout and higher shear stress, suggesting that this screw is more susceptible to loosening.
American Psychological Association (APA)
Fakhouri, Sarah Fakher& Zamarioli, Ariane& Wichr, Célia R. G.& Araujo, Cleudmar Amaral& Aparecido Defino, Helton Luiz& Shimano, Antonio Carlos. 2011. Biomechanical Study of the Pullout Resistance in Screws of a Vertebral Fixation System. Advances in Mechanical Engineering،Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-491610
Modern Language Association (MLA)
Fakhouri, Sarah Fakher…[et al.]. Biomechanical Study of the Pullout Resistance in Screws of a Vertebral Fixation System. Advances in Mechanical Engineering No. 2011 (2011), pp.1-6.
https://search.emarefa.net/detail/BIM-491610
American Medical Association (AMA)
Fakhouri, Sarah Fakher& Zamarioli, Ariane& Wichr, Célia R. G.& Araujo, Cleudmar Amaral& Aparecido Defino, Helton Luiz& Shimano, Antonio Carlos. Biomechanical Study of the Pullout Resistance in Screws of a Vertebral Fixation System. Advances in Mechanical Engineering. 2011. Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-491610
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-491610
