Zobrazit minimální záznam

dc.contributor.authorČada, Radek
dc.contributor.authorFrydrýšek, Karel
dc.contributor.authorSejda, František
dc.contributor.authorDemel, Jiří
dc.contributor.authorPleva, Leopold
dc.date.accessioned2017-09-11T11:39:44Z
dc.date.available2017-09-11T11:39:44Z
dc.date.issued2017
dc.identifier.citationJournal of Medical and Biological Engineering. 2017, vol. 37, issue 4, p. 612-625.cs
dc.identifier.issn1609-0985
dc.identifier.issn2199-4757
dc.identifier.urihttp://hdl.handle.net/10084/120218
dc.description.abstractPaper focuses on biomechanics, specifically on locking cortical bone screws in angularly stable plates used for the treatment of bone fractures in the medical fields of traumatology and orthopaedics. During extraction of titanium-alloy implants, problems are encountered in an effort to loosen some locking bone screws from the locking holes of an angularly stable plate and the subsequent stripping of the internal hexagon of the screw head. The self-locking of the screw-plate threaded joint was verified by calculation and the effect of the angle of the thread on the head of the locking cortical bone screw on self-locking was evaluated. The magnitude of the torque, causing the stripping of the internal hexagon (the Inbus type head) of a locking cortical bone screw with a shank diameter of 3.5 mm from Ti6Al4 V titanium alloy to ISO 5832-3, was determined experimentally. Also, it was experimentally found that the rotation of the screwdriver end with a hexagonal tip inside the locking cortical bone screw head during stripping of the internal hexagon causes strain of the screw head perimeter and thereby an increase of thread friction. The effect of tightening torque on the possibility of loosening of the locking cortical bone screw from the locking hole of an angularly stable plate was assessed experimentally. From the evaluation of five alternative shapes of locking cortical bone screw heads in terms of the acting stress and generated strains, it follows that the best screw is the screw with the Torx type head, which demonstrates the lowest values of reduced stress and equivalent plastic strain. Based on experiments and simulations the authors recommend that all global producers of locking cortical bone screws for locking holes of angularly stable plates use the Torx type heads, and not heads of the Inbus type or the Square, PH, PZ types.cs
dc.language.isoencs
dc.publisherSpringercs
dc.relation.ispartofseriesJournal of Medical and Biological Engineeringcs
dc.relation.urihttp://dx.doi.org/10.1007/s40846-017-0279-4cs
dc.rights© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjecttraumatologycs
dc.subjectorthopaedicscs
dc.subjectlocking bone screwcs
dc.subjectangularly stable platecs
dc.subjectosteosynthesiscs
dc.subjectbiomechanicscs
dc.titleAnalysis of locking self-taping bone screws for angularly stable platescs
dc.typearticlecs
dc.identifier.doi10.1007/s40846-017-0279-4
dc.rights.accessopenAccesscs
dc.type.versionpublishedVersioncs
dc.type.statusPeer-reviewedcs
dc.description.sourceWeb of Sciencecs
dc.description.volume37cs
dc.description.issue4cs
dc.description.lastpage625cs
dc.description.firstpage612cs
dc.identifier.wos000407949800016


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Zobrazit minimální záznam

© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Kromě případů, kde je uvedeno jinak, licence tohoto záznamu je © The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.