A biomechanical study of locking spongious screws and failure rates are higher than expected in plate fixation

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dc.contributor.authorParmaksızoğlu, Fatih
dc.contributor.authorÇetin, Onur
dc.contributor.authorKılıç, Sinan
dc.contributor.authorİnce, Yener
dc.date.accessioned2026-01-30T10:58:34Z
dc.date.available2026-01-30T10:58:34Z
dc.date.issued2025
dc.departmentİstanbul Medipol Üniversitesi, Tıp Fakültesi, Cerrahi Tıp Bilimleri Bölümü, Ortopedi ve Travmatoloji Ana Bilim Dalı
dc.description.abstractLocking plates have a rapidly growing process especially in the past decades and results are satisfactory especially in the osteoporotic bones compared to non-locking compression plates. There are many forms of failure in the fracture fixation of locking plates, and screw pull-out is one of the main failure reasons. In this study, we aim to investigate pull-out failure in locking plates using locking spongious screws. The pull-out force of an FDA approved locking plate system (LPS) and anonymous locking plate using the single lead head locking spongious screw (LPuLSS) was evaluated in vitro on the PCF-15 and PCF-10 osteoporotic sawbone models. A total of 28 individual plate-bone models were tested and pull-out force was evaluated on a distraction machine. The moment of separation of the screws from the bone blocks was noted. In the first study using PCF15 bone model, in Group 1, the pull-out force has an average of 606.82 N. In Group 2, the pull-out force has an average of 294.15 N. According to these results, Group 1 adhere to the bone model 206.29% more strongly than those in Group 2 (P = 0.025). In the second study using PCF 10, in Group 3, the average pull-out force was 166.50 N and in Group 4 the average was 42.83 N. According to these results, Group 3 adhere to the bone model 388.74% more strongly than those in Group 4 (P = 0.002). Locking plates are mostly used in osteoporotic bones and this study demonstrated that the single lead head locking spongious screws which is currently used worldwide have a serious technical problem which arouses with difference of the thread pitch distances on the body and on the head causes pull-out failure.
dc.identifier.citationParmaksızoğlu, F., Çetin, O., Kılıç, S. ve İnce, Y. (2025). A biomechanical study of locking spongious screws and failure rates are higher than expected in plate fixation. Scientific Reports, 15(1). http://dx.doi.org/10.1038/s41598-025-87045-0
dc.identifier.doi10.1038/s41598-025-87045-0
dc.identifier.issn2045-2322
dc.identifier.issue1
dc.identifier.pmid39837929
dc.identifier.scopus2-s2.0-85216524238
dc.identifier.scopusqualityQ1
dc.identifier.urihttp://dx.doi.org/10.1038/s41598-025-87045-0
dc.identifier.urihttps://hdl.handle.net/20.500.12511/13399
dc.identifier.volume15
dc.identifier.wosWOS:001403054300029
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthorÇetin, Onur
dc.institutionauthorid0000-0002-3986-2527
dc.language.isoen
dc.relation.ispartofScientific Reports
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectFracture
dc.subjectLocking Plate
dc.subjectLocking Spongiosus Screw
dc.subjectOsteoporosis
dc.titleA biomechanical study of locking spongious screws and failure rates are higher than expected in plate fixation
dc.typeArticle

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