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Article: Defects in Nickel-Titanium Instruments after Clinical Use. Part 1: Relationship between Observed Imperfections and Factors Leading to Such Defects in a Cohort Study

TitleDefects in Nickel-Titanium Instruments after Clinical Use. Part 1: Relationship between Observed Imperfections and Factors Leading to Such Defects in a Cohort Study
Authors
Issue Date2009
PublisherElsevier Inc. The Journal's web site is located at http://www.jendodon.com
Citation
Journal Of Endodontics, 2009, v. 35 n. 1, p. 129-132 How to Cite?
AbstractThe purpose of this study was to examine three different types of nickel-titanium (NiTi) systems (ProTaper [Dentsply Maillefer, Ballaigues, Switzerland], ProTaper for Hand Use [Dentsply Maillefer], and K3 [SybronEndo, Orange, CA]) that were discarded by 3 endodontic clinics. The instruments were evaluated for defects and factors leading to instrument deformation or fracture. A total of 1682 instruments were collected over 16 months and were examined. The location of the defect, if any, was recorded. The overall prevalence of unwinding defects was 3% and fracture 5%; the rates differed significantly between clinics. For one brand (ProTaper) used at two different clinics, a defect rate (fracture and distortion combined) of 7% (clinic A) vs. 13% (clinic B) for Shaping files (P < 0.05), and about 4% vs. 10% for Finishing files (P < 0.05) was observed. Fragments of broken Shaping file were significantly longer in clinic A than for clinic B (P < 0.05). The lowest defect rate was found for K3 instruments: unwinding 1%, and fracture 3%. It was concluded that the defect rates of NiTi instruments were influenced by such factors as the operator, preparation technique and instrument design. © 2008 American Association of Endodontists.
Persistent Identifierhttp://hdl.handle.net/10722/154551
ISSN
2015 Impact Factor: 2.904
2015 SCImago Journal Rankings: 1.681
ISI Accession Number ID
Funding AgencyGrant Number
University Research Committee, The University of Hong Kong
Funding Information:

Supported in part by a Seed Funding Programme for Basic Research, University Research Committee, The University of Hong Kong (account no. 10207586.12058.08008.302.01)

References

 

DC FieldValueLanguage
dc.contributor.authorShen, Yen_US
dc.contributor.authorHaapasalo, Men_US
dc.contributor.authorCheung, GSpen_US
dc.contributor.authorPeng, Ben_US
dc.date.accessioned2012-08-08T08:26:07Z-
dc.date.available2012-08-08T08:26:07Z-
dc.date.issued2009en_US
dc.identifier.citationJournal Of Endodontics, 2009, v. 35 n. 1, p. 129-132en_US
dc.identifier.issn0099-2399en_US
dc.identifier.urihttp://hdl.handle.net/10722/154551-
dc.description.abstractThe purpose of this study was to examine three different types of nickel-titanium (NiTi) systems (ProTaper [Dentsply Maillefer, Ballaigues, Switzerland], ProTaper for Hand Use [Dentsply Maillefer], and K3 [SybronEndo, Orange, CA]) that were discarded by 3 endodontic clinics. The instruments were evaluated for defects and factors leading to instrument deformation or fracture. A total of 1682 instruments were collected over 16 months and were examined. The location of the defect, if any, was recorded. The overall prevalence of unwinding defects was 3% and fracture 5%; the rates differed significantly between clinics. For one brand (ProTaper) used at two different clinics, a defect rate (fracture and distortion combined) of 7% (clinic A) vs. 13% (clinic B) for Shaping files (P < 0.05), and about 4% vs. 10% for Finishing files (P < 0.05) was observed. Fragments of broken Shaping file were significantly longer in clinic A than for clinic B (P < 0.05). The lowest defect rate was found for K3 instruments: unwinding 1%, and fracture 3%. It was concluded that the defect rates of NiTi instruments were influenced by such factors as the operator, preparation technique and instrument design. © 2008 American Association of Endodontists.en_US
dc.languageengen_US
dc.publisherElsevier Inc. The Journal's web site is located at http://www.jendodon.comen_US
dc.relation.ispartofJournal of Endodonticsen_US
dc.subject.meshCohort Studiesen_US
dc.subject.meshDental Alloysen_US
dc.subject.meshDental Instrumentsen_US
dc.subject.meshDental Stress Analysisen_US
dc.subject.meshEquipment Failure Analysisen_US
dc.subject.meshEquipment Reuseen_US
dc.subject.meshNickelen_US
dc.subject.meshRoot Canal Preparation - Instrumentationen_US
dc.subject.meshTitaniumen_US
dc.titleDefects in Nickel-Titanium Instruments after Clinical Use. Part 1: Relationship between Observed Imperfections and Factors Leading to Such Defects in a Cohort Studyen_US
dc.typeArticleen_US
dc.identifier.emailCheung, GSp:spcheung@hkucc.hku.hken_US
dc.identifier.authorityCheung, GSp=rp00016en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.joen.2008.10.014en_US
dc.identifier.pmid19084142-
dc.identifier.scopuseid_2-s2.0-57149124087en_US
dc.identifier.hkuros154547-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-57149124087&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume35en_US
dc.identifier.issue1en_US
dc.identifier.spage129en_US
dc.identifier.epage132en_US
dc.identifier.isiWOS:000262140700028-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridShen, Y=7404767171en_US
dc.identifier.scopusauthoridHaapasalo, M=7003569249en_US
dc.identifier.scopusauthoridCheung, GSp=7005809531en_US
dc.identifier.scopusauthoridPeng, B=7102873002en_US

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