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Article: Cyclic Fatigue and Fracture Characteristics of Ground and Twisted Nickel-Titanium Rotary Files

TitleCyclic Fatigue and Fracture Characteristics of Ground and Twisted Nickel-Titanium Rotary Files
Authors
KeywordsCyclic fatigue
electropolishing
fracture
machining grooves
nickel-titanium
rotary instrument
surface defect
Twisted File
Issue Date2010
PublisherElsevier Inc. The Journal's web site is located at http://www.jendodon.com
Citation
Journal Of Endodontics, 2010, v. 36 n. 1, p. 147-152 How to Cite?
AbstractIntroduction: The purposes of this study were to compare the fatigue resistance of traditional, ground nickel-titanium rotary instruments with the Twisted File and to examine the fracture characteristics of the fatigued fragment. Methods: Size #25, 0.06 tapered, TF (SybronEndo), RaCe (FKG Dentaire), Helix (DiaDent), and ProTaper F1 (Dentsply Maillefer) were examined with scanning electron microscope for surface characteristics before subjected to a cyclic (rotational bending) fatigue test. The time until fracture was recorded to calculate the number of revolutions for each instrument. The data were compared for differences by using analysis of variance and post hoc Scheffé test. The fragments were examined with scanning electron microscope both in lateral view and fractographically. Results: TF showed a significantly higher resistance to cyclic fatigue than other nickel-titanium files that were manufactured with a grinding process (P < .05). The path of crack propagation appeared to be different for electropolished (TF and RaCe) versus non-electropolished (Helix and ProTaper) instruments. Conclusions: Although all specimens showed similar fractographic appearance, which indicated a similar fracture mechanism, instruments with abundant machining grooves seemed to have a higher risk of fatigue. © 2010 American Association of Endodontists.
Persistent Identifierhttp://hdl.handle.net/10722/66462
ISSN
2015 Impact Factor: 2.904
2015 SCImago Journal Rankings: 1.681
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKim, HCen_HK
dc.contributor.authorYum, Jen_HK
dc.contributor.authorHur, Ben_HK
dc.contributor.authorCheung, GSPen_HK
dc.date.accessioned2010-09-06T05:46:34Z-
dc.date.available2010-09-06T05:46:34Z-
dc.date.issued2010en_HK
dc.identifier.citationJournal Of Endodontics, 2010, v. 36 n. 1, p. 147-152en_HK
dc.identifier.issn0099-2399en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66462-
dc.description.abstractIntroduction: The purposes of this study were to compare the fatigue resistance of traditional, ground nickel-titanium rotary instruments with the Twisted File and to examine the fracture characteristics of the fatigued fragment. Methods: Size #25, 0.06 tapered, TF (SybronEndo), RaCe (FKG Dentaire), Helix (DiaDent), and ProTaper F1 (Dentsply Maillefer) were examined with scanning electron microscope for surface characteristics before subjected to a cyclic (rotational bending) fatigue test. The time until fracture was recorded to calculate the number of revolutions for each instrument. The data were compared for differences by using analysis of variance and post hoc Scheffé test. The fragments were examined with scanning electron microscope both in lateral view and fractographically. Results: TF showed a significantly higher resistance to cyclic fatigue than other nickel-titanium files that were manufactured with a grinding process (P < .05). The path of crack propagation appeared to be different for electropolished (TF and RaCe) versus non-electropolished (Helix and ProTaper) instruments. Conclusions: Although all specimens showed similar fractographic appearance, which indicated a similar fracture mechanism, instruments with abundant machining grooves seemed to have a higher risk of fatigue. © 2010 American Association of Endodontists.en_HK
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.jendodon.comen_HK
dc.relation.ispartofJournal of Endodonticsen_HK
dc.subjectCyclic fatigueen_HK
dc.subjectelectropolishingen_HK
dc.subjectfractureen_HK
dc.subjectmachining groovesen_HK
dc.subjectnickel-titaniumen_HK
dc.subjectrotary instrumenten_HK
dc.subjectsurface defecten_HK
dc.subjectTwisted Fileen_HK
dc.subject.meshDental Alloys-
dc.subject.meshDental Instruments-
dc.subject.meshDental Stress Analysis-
dc.subject.meshRoot Canal Preparation - instrumentation-
dc.subject.meshSurface Properties-
dc.titleCyclic Fatigue and Fracture Characteristics of Ground and Twisted Nickel-Titanium Rotary Filesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0099-2399&volume=36&issue=1&spage=147&epage=152&date=2010&atitle=Cyclic+fatigue+and+fracture+characteristics+of+ground+and+twisted+nickel-titanium+rotary+filesen_HK
dc.identifier.emailCheung, GSP:spcheung@hkucc.hku.hken_HK
dc.identifier.authorityCheung, GSP=rp00016en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.joen.2009.09.037en_HK
dc.identifier.pmid20003955-
dc.identifier.scopuseid_2-s2.0-71049174561en_HK
dc.identifier.hkuros168823en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-71049174561&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume36en_HK
dc.identifier.issue1en_HK
dc.identifier.spage147en_HK
dc.identifier.epage152en_HK
dc.identifier.eissn1878-3554-
dc.identifier.isiWOS:000279279200027-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridKim, HC=8988729500en_HK
dc.identifier.scopusauthoridYum, J=35224391200en_HK
dc.identifier.scopusauthoridHur, B=14056308400en_HK
dc.identifier.scopusauthoridCheung, GSP=7005809531en_HK

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