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Article: Mechanical behavior of ProTaper Universal F2 finishing file under various curvature conditions: A finite element analysis study

TitleMechanical behavior of ProTaper Universal F2 finishing file under various curvature conditions: A finite element analysis study
Authors
Issue Date2011
PublisherElsevier Inc. The Journal's web site is located at http://www.jendodon.com
Citation
Journal of Endodontics, 2011, v. 37 n. 10, p. 1446-1450 How to Cite?
AbstractIntroduction: The purpose of this study was to visualize the stresses and strain distribution patterns in ProTaper Universal F2 files (Dentsply Maillefer, Ballaigues, Switzerland) and to establish the stress- and strain-curvature relationship for this instrument under various conditions by using a dynamic, three-dimensional finite-element model. Methods: An accurate geometric model of a ProTaper Universal F2 instrument was created. Two short, straight tubes were also modeled to represent the parts of root canal apical and coronal to the curvature. Then, the file was constrained to a curve of varying degree, curve length, and position. The maximum von Mises stress and strain on the tension side of the instrument was measured at 5-degree intervals in a numerical simulation package (LS-DYNA; Livermore Software Technology, Livermore, CA). Results: The mechanical performance of the ProTaper F2 file under various conditions was simulated. A long curvature length produced lower values of stress and strain under the same angle of curvature. An increase in the curvature angle generally induces higher stress and strain. For the same degree and curve length, the stress and strain increased if the curved portion was situated further up the shaft of the instrument (ie, with a larger diameter). Conclusions: The dynamic, numerical model may be used to evaluate and compare the effect of various root canal curvatures on the behavior of different designs of root canal instrument. The magnitude of stress and strain imposed on the instrument is influenced by the abruptness and degree of curvature as well as the location of the curved portion. Copyright © 2011 American Association of Endodontists.
Persistent Identifierhttp://hdl.handle.net/10722/143359
ISSN
2015 Impact Factor: 2.904
2015 SCImago Journal Rankings: 1.681
ISI Accession Number ID
Funding AgencyGrant Number
State Key Laboratory of Oral Diseases of ChinaSKLOD008
Sichuan University2008072
Funding Information:

Supported by Open Research Fund Program of the State Key Laboratory of Oral Diseases of China (grant no. SKLOD008) and Youth Fund Program of Sichuan University (grant no. 2008072).

References

 

DC FieldValueLanguage
dc.contributor.authorGao, Yen_HK
dc.contributor.authorCheung, GSPen_HK
dc.contributor.authorShen, Yen_HK
dc.contributor.authorZhou, Xen_HK
dc.date.accessioned2011-11-24T10:03:15Z-
dc.date.available2011-11-24T10:03:15Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal of Endodontics, 2011, v. 37 n. 10, p. 1446-1450en_HK
dc.identifier.issn0099-2399en_HK
dc.identifier.urihttp://hdl.handle.net/10722/143359-
dc.description.abstractIntroduction: The purpose of this study was to visualize the stresses and strain distribution patterns in ProTaper Universal F2 files (Dentsply Maillefer, Ballaigues, Switzerland) and to establish the stress- and strain-curvature relationship for this instrument under various conditions by using a dynamic, three-dimensional finite-element model. Methods: An accurate geometric model of a ProTaper Universal F2 instrument was created. Two short, straight tubes were also modeled to represent the parts of root canal apical and coronal to the curvature. Then, the file was constrained to a curve of varying degree, curve length, and position. The maximum von Mises stress and strain on the tension side of the instrument was measured at 5-degree intervals in a numerical simulation package (LS-DYNA; Livermore Software Technology, Livermore, CA). Results: The mechanical performance of the ProTaper F2 file under various conditions was simulated. A long curvature length produced lower values of stress and strain under the same angle of curvature. An increase in the curvature angle generally induces higher stress and strain. For the same degree and curve length, the stress and strain increased if the curved portion was situated further up the shaft of the instrument (ie, with a larger diameter). Conclusions: The dynamic, numerical model may be used to evaluate and compare the effect of various root canal curvatures on the behavior of different designs of root canal instrument. The magnitude of stress and strain imposed on the instrument is influenced by the abruptness and degree of curvature as well as the location of the curved portion. Copyright © 2011 American Association of Endodontists.en_HK
dc.languageengen_US
dc.publisherElsevier Inc. The Journal's web site is located at http://www.jendodon.comen_HK
dc.relation.ispartofJournal of Endodonticsen_HK
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Endodontics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Endodontics, 2011, v. 37 n. 10, p. 1446-1450. DOI: 10.1016/j.joen.2011.06.003-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subject.meshDental Alloysen_HK
dc.subject.meshDental Instrumentsen_HK
dc.subject.meshDental Stress Analysis - methodsen_HK
dc.subject.meshElasticityen_HK
dc.subject.meshEquipment Designen_HK
dc.subject.meshFinite Element Analysisen_HK
dc.subject.meshMechanicsen_HK
dc.subject.meshNickelen_HK
dc.subject.meshNumerical Analysis, Computer-Assisteden_HK
dc.subject.meshPliabilityen_HK
dc.subject.meshRoot Canal Preparation - instrumentationen_HK
dc.subject.meshTitaniumen_HK
dc.titleMechanical behavior of ProTaper Universal F2 finishing file under various curvature conditions: A finite element analysis studyen_HK
dc.typeArticleen_HK
dc.identifier.emailCheung, GSP:spcheung@hkucc.hku.hken_HK
dc.identifier.authorityCheung, GSP=rp00016en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.joen.2011.06.003en_HK
dc.identifier.pmid21924200-
dc.identifier.scopuseid_2-s2.0-80052913828en_HK
dc.identifier.hkuros197782en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052913828&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume37en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1446en_HK
dc.identifier.epage1450en_HK
dc.identifier.isiWOS:000295661800023-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridGao, Y=34975077300en_HK
dc.identifier.scopusauthoridCheung, GSP=7005809531en_HK
dc.identifier.scopusauthoridShen, Y=35574675000en_HK
dc.identifier.scopusauthoridZhou, X=34876079200en_HK

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