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Article: Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis

TitleStress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis
Authors
Issue Date2009
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/IEJ
Citation
International Endodontic Journal, 2009, v. 42 n. 1, p. 14-21 How to Cite?
AbstractKim TO, Cheung GSP, Lee JM, Kim BM, Hur B, Kim HC. Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis. International Endodontic Journal, 42, 14-21, 2009.AbstractAim To compare and evaluate the stress distribution of three NiTi instruments of various cross-sectional configurations under bending or torsional condition using a finite-element analysis model. Methodology Three NiTi files (ProFile, ProTaper and ProTaper Universal) were scanned using Micro-CT to produce a three-dimensional digital model. The behaviour of the instrument under bending or torsional loads was analysed mathematically in software (ABAQUS V6.5-1), taking into consideration the nonlinear mechanical characteristic of NiTi material. Results ProFile showed the greatest flexibility, followed by ProTaper Universal and ProTaper. The highest stress was observed at the surface near the cutting edge and the base of (opposing) flutes during cantilever bending. Concentration of stresses was observed at the bottom of the flutes in ProFile and ProTaper Universal instruments in torsion. The stress was more evenly distributed over the surface of ProTaper initially, which then concentrated at the middle of the convex sides when the amount of angular deflection was increased. Conclusion Incorporating a U-shaped groove in the middle of each side of the convex-triangular design lowers the flexural rigidity of the origin ProTaper design. Bending leads to the highest surface stress at or near the cutting edge of the instrument. Stress concentration occurs at the bottom of the flute when the instrument is subjected to torsion. © 2009 International Endodontic Journal.
Persistent Identifierhttp://hdl.handle.net/10722/58006
ISSN
2015 Impact Factor: 2.842
2015 SCImago Journal Rankings: 2.020
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKim, TOen_HK
dc.contributor.authorCheung, GSPen_HK
dc.contributor.authorLee, JMen_HK
dc.contributor.authorKim, BMen_HK
dc.contributor.authorHur, Ben_HK
dc.contributor.authorKim, HCen_HK
dc.date.accessioned2010-05-31T03:22:14Z-
dc.date.available2010-05-31T03:22:14Z-
dc.date.issued2009en_HK
dc.identifier.citationInternational Endodontic Journal, 2009, v. 42 n. 1, p. 14-21en_HK
dc.identifier.issn0143-2885en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58006-
dc.description.abstractKim TO, Cheung GSP, Lee JM, Kim BM, Hur B, Kim HC. Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis. International Endodontic Journal, 42, 14-21, 2009.AbstractAim To compare and evaluate the stress distribution of three NiTi instruments of various cross-sectional configurations under bending or torsional condition using a finite-element analysis model. Methodology Three NiTi files (ProFile, ProTaper and ProTaper Universal) were scanned using Micro-CT to produce a three-dimensional digital model. The behaviour of the instrument under bending or torsional loads was analysed mathematically in software (ABAQUS V6.5-1), taking into consideration the nonlinear mechanical characteristic of NiTi material. Results ProFile showed the greatest flexibility, followed by ProTaper Universal and ProTaper. The highest stress was observed at the surface near the cutting edge and the base of (opposing) flutes during cantilever bending. Concentration of stresses was observed at the bottom of the flutes in ProFile and ProTaper Universal instruments in torsion. The stress was more evenly distributed over the surface of ProTaper initially, which then concentrated at the middle of the convex sides when the amount of angular deflection was increased. Conclusion Incorporating a U-shaped groove in the middle of each side of the convex-triangular design lowers the flexural rigidity of the origin ProTaper design. Bending leads to the highest surface stress at or near the cutting edge of the instrument. Stress concentration occurs at the bottom of the flute when the instrument is subjected to torsion. © 2009 International Endodontic Journal.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/IEJen_HK
dc.relation.ispartofInternational Endodontic Journalen_HK
dc.rightsInternational Endodontic Journal. Copyright © Blackwell Publishing Ltd.en_HK
dc.subject.meshDental Alloys - chemistryen_HK
dc.subject.meshElastic Modulusen_HK
dc.subject.meshElasticityen_HK
dc.subject.meshEquipment Designen_HK
dc.subject.meshFinite Element Analysisen_HK
dc.subject.meshHumansen_HK
dc.subject.meshImaging, Three-Dimensionalen_HK
dc.subject.meshMaterials Testingen_HK
dc.subject.meshModels, Theoreticalen_HK
dc.subject.meshNickel - chemistryen_HK
dc.subject.meshNonlinear Dynamicsen_HK
dc.subject.meshPliabilityen_HK
dc.subject.meshRoot Canal Preparation - instrumentationen_HK
dc.subject.meshSoftwareen_HK
dc.subject.meshStress, Mechanicalen_HK
dc.subject.meshSurface Propertiesen_HK
dc.subject.meshTitanium - chemistryen_HK
dc.subject.meshTorsion, Mechanicalen_HK
dc.titleStress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysisen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0143-2885&volume=42&spage=14&epage=21&date=2009&atitle=Stress+distribution+of+three+NiTi+rotary+files+under+bending+and+torsional+conditions+using+a+mathematic+analysisen_HK
dc.identifier.emailCheung, GSP:spcheung@hkucc.hku.hken_HK
dc.identifier.authorityCheung, GSP=rp00016en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-2591.2008.01481.xen_HK
dc.identifier.pmid19125976-
dc.identifier.scopuseid_2-s2.0-57649244370en_HK
dc.identifier.hkuros154252en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-57649244370&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume42en_HK
dc.identifier.issue1en_HK
dc.identifier.spage14en_HK
dc.identifier.epage21en_HK
dc.identifier.isiWOS:000261783000004-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridKim, TO=25925024800en_HK
dc.identifier.scopusauthoridCheung, GSP=7005809531en_HK
dc.identifier.scopusauthoridLee, JM=34877050800en_HK
dc.identifier.scopusauthoridKim, BM=7501564538en_HK
dc.identifier.scopusauthoridHur, B=14056308400en_HK
dc.identifier.scopusauthoridKim, HC=8988729500en_HK
dc.identifier.citeulike3804329-

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