Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/1523
Title: Pullout performance comparison of novel expandable pedicle screw with expandable poly-ether-ether-ketone shells and cement-augmented pedicle screws
Authors: Aycan, Mehmet Fatih
Tolunay, Tolga
Demir, Teyfik
Yaman, Mesut Emre
Usta, Yusuf
144123
Keywords: Bovine vertebra
pedicle screw
polyurethane foam
pullout test
expandable
poly-ether-ether-ketone shell
Issue Date: Feb-2017
Publisher: Sage Publications Ltd
Source: Aycan, M. F., Tolunay, T., Demir, T., Yaman, M. E., & Usta, Y. (2017). Pullout performance comparison of novel expandable pedicle screw with expandable poly-ether-ether-ketone shells and cement-augmented pedicle screws. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 231(2), 169-175.
Abstract: Aim of this study is to assess the pullout performance of various pedicle screws in different test materials. Polyurethane foams (Grade 10 and Grade 40) produced in laboratory and bovine vertebrae were instrumented with normal, cannulated (cemented), novel expandable and normal (cemented) pedicle screws. Test samples were prepared according to the ASTM F543 standard testing protocols and surgical guidelines. To examine the screw placement and cement distribution, anteriosuperior and oblique radiographs were taken from each sample after insertion process was completed. Pullout tests were performed in an Instron 3369 testing device. Load versus displacement graphs were recorded and the ultimate pullout force was defined as the maximum load (pullout strength) sustained before failure of screw. Student's t-test was performed on each group whether the differences between pullout strength of pedicle screws were significant or not. While normal pedicle screws have the lowest pullout strength in all test materials, normal pedicle screws cemented with polymethylmethacrylate exhibit significantly higher pullout performance than others. For all test materials, there is a significant improvement in pullout strength of normal screws by augmentation. While novel expandable pedicle screws with expandable poly-ether-ether-ketone shells exhibited lower pullout performance than normal screws cemented with polymethylmethacrylate, their pullout performances in all groups were higher than the ones of normal and cannulated pedicle screws. For all test materials, although cannulated pedicle screws exhibit higher pullout strength than normal pedicle screws, there are no significant differences between the two groups. The novel expandable pedicle screws with expandable poly-ether-ether-ketone shells may be used instead of normal and cannulated pedicle screws cemented with polymethylmethacrylate due to their good performances.
URI: https://doi.org/10.1177/0954411916687792
https://hdl.handle.net/20.500.11851/1523
ISSN: 0954-4119
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Show full item record

CORE Recommender

SCOPUSTM   
Citations

12
checked on Sep 23, 2022

WEB OF SCIENCETM
Citations

13
checked on Sep 24, 2022

Page view(s)

24
checked on Dec 26, 2022

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.