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Rotary fatigue testing machine to determine the fatigue life of NiTi alloy Wwres and endondontic files

2015Journal article Open access
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dc.contributor.authorCarvalho, André
dc.contributor.authorFreitas, Manuel
dc.contributor.authorReis, Luís
dc.contributor.authorMontalvao, Diogo
dc.contributor.authorFonte, M.
dc.date.accessioned2020-05-22T12:54:15Z
dc.date.available2020-05-22T12:54:15Z
dc.date.issued2015
dc.description.abstractEndodontic rotary file instruments used to treat root canals in dentistry suffered breakthrough transformations in recent years when stainless steel was replaced by Nickel-Titanium (NiTi). NiTi alloys used in Endodontics possess superelastic properties at body temperature (37C) that bring many advantages on the overall performance of the root-canal treatment. They can follow curved root canals more easily than stainless steel instruments and have been reported to be more effective in the removal of the inflamed pulp tissue and protection of the tooth structure. However, these instruments eventually fracture under cyclic bending loading due to fatigue, without any visible signals of degradation to the practitioner. This problem brought new challenges on how new instruments should be tested, as NiTi alloys are highly non-linear and present a large hysteresis cycle in the Elastic domain. Current existing standards are only available for Stainless Steel testing. Thus, many authors have attempted to design systems that can test NiTi endodontic files under fatigue loads. However, no approach has been universally adopted by the community yet, as in most cases they are based on empirical set ups. Following a more systematic approach, this work presents the results of rotary fatigue tests for several NiTi wires from different manufacturers (MemryTM and EuroflexTM). The tests were done on a versatile fully automatic rotary bending testing machine. The formulation is also presented, where the material strength reduction can be quantified from the determination of the strain and the number of cycles until failure.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCARVALHO, André; [et al] – Rotary fatigue testing machine to determine the fatigue life of NiTi alloy Wwres and endondontic files. Procedia Engineering. ISSN 1877-7058. Vol. 114 (2015), pp. 500-505pt_PT
dc.identifier.doi10.1016/j.proeng.2015.08.098pt_PT
dc.identifier.issn1877-7058
dc.identifier.urihttp://hdl.handle.net/10400.21/11683
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPTDC/EME/AME/122795/2010 - FCTpt_PT
dc.relation.publisherversionhttps://pdf.sciencedirectassets.com/278653/1-s2.0-S1877705815X0021X/1-s2.0-S1877705815017373/main.pdf?X-Amz-Date=20200522T125041Z&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Signature=a6dbe8f70f298cc262aa7ff068f9d5d0e44208d6fcdc3a71228c304b7626ebc4&X-Amz-Credential=ASIAQ3PHCVTY2IGH7GQB%2F20200522%2Fus-east-1%2Fs3%2Faws4_request&type=client&tid=prr-8bf8bb29-5ca0-4422-b6b6-780c35d53c13&sid=b78114a7344ef144211a176-cfc501e8fe68gxrqb&pii=S1877705815017373&X-Amz-SignedHeaders=host&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEOz%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJGMEQCIELacRxW6xBHId3%2B4nkpHJubGGQ5CNsiqlwpMcqNoaqYAiBllkEHObwxrB3X2%2FJTNZHqbLZNIrpiMwz%2Fz6eEB1JqZSq0AwhFEAMaDDA1OTAwMzU0Njg2NSIMKBL8wClvmEpDGrdKKpED%2B2MlCQV40tFh5%2FuQGQRjkYmubbJPQV0nC1htBk%2FB%2FN5in96r2jNf7kYhqW2Y1sKsUqaQ6%2BO412m1VYdRhCpaUcieIC054NX3H6su0VBh%2Fh89%2BW3gRg8EFmCvjVQZnIaVeoWsqBVMicFL%2FC6LACGyZP7GNl2Rru6GeKO3wxe1HdMpH84T3r97Vepip7w%2FWYoPHOpF7Ni%2BZiD%2FPzD%2FleVDG9pTHeGZnbmuUTROIQTJY3bp8veygEsN1EjPWNgkMACo3Cu%2BtmOKQx0X8MsYq6JO28onRwwaDPmD7v68L94WAe7NE7obaqxPFxLWANA32aQMMimV1t7PY4e5ZvnfsEMYPCIy%2BM5GHCr2WpBHGDg7Uqh%2FandPTGIUJJfDQ5m%2BqjE6qCjosAflqJJS1z%2BM498rdaRDQdGmvCaukoOD9Qs%2B%2B%2FrPs%2B8t6VeaqH2lc5zuKrYSsafjDReAQS%2FAiudPQY1eHb8yOb8soaCQpAAs32ZGP50pPtPj3t1OIsbWb8vz157Shdf2V5%2FsWbQSydN7xnzN6Hgwkfqe9gU67AEtT2d58j1CJflIjAfLTZ%2F7Ap8JAli1nGRjAFLOT3ViG0YLMwLTbjq2r4z27dT0tVG8aavkfY%2FuTI%2Fzwmrs3o0IhoDNccRcbndul4DtIWW9eU%2Ft9uD3agVD6B%2FUfy03IY4HQf6oszwmyMjzPnz4wf4sFhbC7xjZ4jPWGULqE0cbXEwsYnDR6%2BmXM8v1WQ0eNRqPbcMGi7W7a41WkBgesb6mAlDSiy%2BSl3%2FxwDvrQH%2Bv22yihdrttK5yZHpDMLYiU7Tx6JAIEztltbTon8wE%2FHF%2BkYHY4%2Ff6oFSudyzWOqstQT2f%2B71Ryy%2FwPO8fgA%3D%3D&host=68042c943591013ac2b2430a89b270f6af2c76d8dfd086a07176afe7c76c2c61&X-Amz-Expires=300&hash=43fb93f157f209966de235637b8fd717b130b8a9d2bb1c96d4fbcc5b68d1f478pt_PT
dc.subjectFatiguept_PT
dc.subjectFilespt_PT
dc.subjectNiTi wirespt_PT
dc.subjectLife evaluationpt_PT
dc.titleRotary fatigue testing machine to determine the fatigue life of NiTi alloy Wwres and endondontic filespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage505pt_PT
oaire.citation.startPage500pt_PT
oaire.citation.titleProcedia Engineeringpt_PT
oaire.citation.volume114pt_PT
person.familyNameCarvalho
person.familyNameCoelho de Carvalho Montalvão e Silva
person.familyNameFonte
person.givenNameAndré
person.givenNameDiogo
person.givenNameManuel
person.identifier.ciencia-id4719-C315-3211
person.identifier.ciencia-id0412-999D-5548
person.identifier.orcid0000-0002-2089-7156
person.identifier.orcid0000-0003-1108-0475
person.identifier.orcid0000-0001-7894-9716
person.identifier.ridI-7571-2015
person.identifier.ridM-7101-2013
person.identifier.scopus-author-id58778332900
person.identifier.scopus-author-id6507968634
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublicatione410f498-8f3c-4de7-8be0-93f637157db4
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relation.isAuthorOfPublication.latestForDiscovery65d2ad9c-a654-457d-aef4-10d7ca5782fd

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