Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/893
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dc.contributor.authorAycan, Mehmet Fatih-
dc.contributor.authorYaman, Mesut Emre-
dc.contributor.authorUsta, Yusuf-
dc.contributor.authorDemir, Teyfik-
dc.contributor.authorTolunay, Tolga-
dc.date.accessioned2019-03-29T13:25:56Z
dc.date.available2019-03-29T13:25:56Z
dc.date.issued2018-04-01-
dc.identifier.citationAycan, M. F., Yaman, M. E., Usta, Y., Demir, T., & Tolunay, T. (2018). Investigation of toggling effect on pullout performance of pedicle screws. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 232(4), 395-402.en_US
dc.identifier.issn0954-4119-
dc.identifier.urihttps://doi.org/10.1177/0954411918755417-
dc.identifier.urihttps://hdl.handle.net/20.500.11851/893-
dc.description.abstractObjective of this study is to assess the pullout performance of various pedicle screws in different test materials after toggling tests comparatively. Solid core, cannulated (cemented), novel expandable and solid-core (cemented) pedicle screws were instrumented to the polyurethane foams (Grade 10 and Grade 40) produced in laboratory and bovine vertebra. ASTM F543 standard was used for preparation process of samples. Toggling tests were carried out. After toggling test procedures, pullout tests were performed. Load versus displacement graph was recorded, and the ultimate pullout force was defined as the maximum load (pullout strength) sustained before failure of screw. Anteriosuperior and oblique radiographs were taken from each sample after instrumentation in order to examine screw placement and cement distribution. The pullout strength of pedicle screws decreased after toggling tests with respect to the initial condition. While the cemented solid-core pedicle screws had the highest pullout strength in all test materials, they had the highest strength differences. The cemented solid-core pedicle screws had decrement rates of 27% and 16% in Grade 10 and Grade 40, respectively. There are almost same decrement rate (between 5.5% and 6.5%) for all types of pedicle screws instrumented to the samples of bovine vertebra. The pullout strengths of novel expandable pedicle screws in both of early period and after toggling conditions were almost similar, in other words, the decrement rates of it were lower than other types. According to the data collected from this study, polymethylmethacrylate augmentation significantly decreases pullout strength following the toggling loads. Higher brittleness of cured polymethylmethacrylate has adverse effect on the pullout strength. Although augmentation is an important process for enhancing pullout strength in early period, it has some disadvantages for preserving stabilization in a long time. Expandable pedicle screw with polyetheretherketone shell may be good alternative to polymethylmethacrylate augmentation on both primer stabilization and long-term loading application with toggling.en_US
dc.language.isoenen_US
dc.publisherSAGE Publications Ltden_US
dc.relation.ispartofProceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicineen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectexpandable polyetheretherketone shellen_US
dc.subjectpullout strengthen_US
dc.subjectTogglingen_US
dc.subjectbovine vertebraen_US
dc.subjectpedicle screwen_US
dc.subjectpolyurethane foamen_US
dc.titleInvestigation of Toggling Effect on Pullout Performance of Pedicle Screwsen_US
dc.typeArticleen_US
dc.departmentFaculties, Faculty of Engineering, Department of Mechanical Engineeringen_US
dc.departmentFakülteler, Mühendislik Fakültesi, Makine Mühendisliği Bölümüen_US
dc.identifier.volume232en_US
dc.identifier.issue4en_US
dc.identifier.startpage395en_US
dc.identifier.endpage402en_US
dc.authoridDemir, Teyfik [0000-0001-6352-8302]-
dc.identifier.wosWOS:000429916100007-
dc.identifier.scopus2-s2.0-85045349117-
dc.institutionauthorDemir, Teyfik-
dc.identifier.pmid29393011-
dc.identifier.doi10.1177/0954411918755417-
dc.identifier.doi10.1177/0954411918755417-
dc.authorscopusidDemir, Teyfik [3488228600]-
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ2-
dc.identifier.wosqualityQ4-
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.openairetypeArticle-
item.grantfulltextnone-
crisitem.author.dept02.7. Department of Mechanical Engineering-
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
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