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Characterisation and evaluation of the mechanical behaviour of endodontic-grade NiTi wires

2019-07Journal article Restricted access
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dc.contributor.authorPereira, Samuel
dc.contributor.authorCarvalho, André
dc.contributor.authorReis, Luis
dc.contributor.authorFreitas, Manuel
dc.contributor.authorMontalvao, Diogo
dc.date.accessioned2020-04-20T15:18:40Z
dc.date.available2020-04-20T15:18:40Z
dc.date.issued2019-07
dc.description.abstractWith the introduction of new materials and advances in medical science, the endodontic files have changed since the early days of root canal treatments. In the late days, we have seen an increasing use of Nickel-Titanium (NiTi) alloys. At body temperature, NiTi alloys present a superelastic behaviour, which allows to be more effective in the removal of the tooth pulp tissue, and in the protection of the tooth structure. Anyhow, these NiTi instruments will eventually fracture, usually without any visual signal of degradation. Thus, there is a need of studying these alloys, as they present a high hysteresis cycle and non-linearities in the Elastic domain. Currently, there is no international standard to test NiTi endodontic files, so various authors have attempted to design systems that can test them under fatigue loads, usually based on empirical setups. Following a systematic approach, this work presents the results of rotary fatigue tests for two Alfa Aesar (R) Nitinol wires with different diameters (0.58mm and 0.25mm).The formulation is presented, where the material strength reduction can be quantified from the determination of the strain and the number of cycles until failure, as well numerical FEM simulation to verify the analytical model predictions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPEREIRA, Samuel; [et al] – Characterisation and evaluation of the mechanical behaviour of endodontic-grade NiTi wires. Frattura ed Integrita Strutturale. ISSN 1971-8993. Vol. 13, N.º 49 (2019), pp. 450-462pt_PT
dc.identifier.doi10.3221/IGF-ESIS.49.43pt_PT
dc.identifier.issn1971-8993
dc.identifier.urihttp://hdl.handle.net/10400.21/11479
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherItalian Group of Fracturept_PT
dc.relationUID/EMS/50022/2019 - FCT, through IDMEC, under LAETApt_PT
dc.subjectFatiguept_PT
dc.subjectSuperelastic Alloyspt_PT
dc.subjectNiTi wirespt_PT
dc.subjectLife Evaluationpt_PT
dc.titleCharacterisation and evaluation of the mechanical behaviour of endodontic-grade NiTi wirespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage462pt_PT
oaire.citation.issue49pt_PT
oaire.citation.startPage450pt_PT
oaire.citation.titleFrattura ed Integrità Strutturalept_PT
oaire.citation.volume13
person.familyNameCarvalho
person.familyNameReis
person.familyNameCoelho de Carvalho Montalvão e Silva
person.givenNameAndré
person.givenNameLuis
person.givenNameDiogo
person.identifier.ciencia-id4719-C315-3211
person.identifier.ciencia-idC314-AC5A-16D2
person.identifier.ciencia-id0412-999D-5548
person.identifier.orcid0000-0002-2089-7156
person.identifier.orcid0000-0001-9848-9569
person.identifier.orcid0000-0003-1108-0475
person.identifier.ridI-7571-2015
person.identifier.ridB-4723-2013
person.identifier.scopus-author-id58778332900
person.identifier.scopus-author-id7006497004
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication68e457b2-45ab-449f-a240-7317c1a42c1b
relation.isAuthorOfPublication8f6b7e0f-bf90-4fe7-9c38-dd3314732661
relation.isAuthorOfPublicatione410f498-8f3c-4de7-8be0-93f637157db4
relation.isAuthorOfPublication.latestForDiscovery68e457b2-45ab-449f-a240-7317c1a42c1b

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