The effect of thermal treatment on the resistance of nickel-titanium rotary files in cyclic fatigue

Zinelis, S; Darabara, M; Takase, T; Ogane, K; Papadimitriou, GD

dc.contributor.author	Zinelis, S	en
dc.contributor.author	Darabara, M	en
dc.contributor.author	Takase, T	en
dc.contributor.author	Ogane, K	en
dc.contributor.author	Papadimitriou, GD	en
dc.date.accessioned	2014-03-01T01:27:25Z
dc.date.available	2014-03-01T01:27:25Z
dc.date.issued	2007	en
dc.identifier.issn	1079-2104	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18439
dc.subject	Nickel	en
dc.subject	Thermal Treatment	en
dc.subject	Titanium	en
dc.subject.classification	Dentistry, Oral Surgery & Medicine	en
dc.subject.other	dental alloy	en
dc.subject.other	nickel	en
dc.subject.other	titanium	en
dc.subject.other	titanium nickelide	en
dc.subject.other	unclassified drug	en
dc.subject.other	article	en
dc.subject.other	dental care	en
dc.subject.other	dental equipment	en
dc.subject.other	endodontics	en
dc.subject.other	equipment	en
dc.subject.other	heat	en
dc.subject.other	instrumentation	en
dc.subject.other	Dental Alloys	en
dc.subject.other	Dental Instruments	en
dc.subject.other	Dental Stress Analysis	en
dc.subject.other	Equipment Failure	en
dc.subject.other	Heat	en
dc.subject.other	Nickel	en
dc.subject.other	Root Canal Preparation	en
dc.subject.other	Titanium	en
dc.title	The effect of thermal treatment on the resistance of nickel-titanium rotary files in cyclic fatigue	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.tripleo.2006.12.026	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.tripleo.2006.12.026	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	Objective. The purpose of this study was to determine the effect of various thermal treatments on the fatigue resistance of a nickel-titanium (NiTi) engine-driven endodontic file. Study design. Fifteen groups of 5 files each of ISO 30 and taper .04 were tested in this study. The cutting tip ( 5 mm from the end) of files from 14 groups were heat treated for 30 minutes in temperatures 250 degrees C, 300 degrees C, 350 degrees C, 375 degrees C, 400 degrees C, 410 degrees C, 420 degrees C, 425 degrees C, 430 degrees C, 440 degrees C, 450 degrees C, 475 degrees C, 500 degrees C, and 550 degrees C, respectively, while 1 group was used as reference. The files were placed in a device that allowed the instruments to be tested for rotating bending fatigue inside an artificial root canal. The number of rotations to breakage was recorded for each file. The mean values of all groups were statistically analyzed using 1-way analysis of variance and Student Newman Keuls multiple comparison test at alpha = .05. Results. The 430 degrees C and 440 degrees C groups showed the highest values, with fatigue resistance decreasing for thermal treatment at lower and higher temperatures. This may be the result of metallurgical changes during annealing. Conclusion. Within the limitations of the low sample size and the specific instrument size tested, it appears that the appropriate thermal treatment may significantly increase the fatigue resistance of the NiTi file tested.	en
heal.publisher	MOSBY-ELSEVIER	en
heal.journalName	Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology	en
dc.identifier.doi	10.1016/j.tripleo.2006.12.026	en
dc.identifier.isi	ISI:000248103300020	en
dc.identifier.volume	103	en
dc.identifier.issue	6	en
dc.identifier.spage	843	en
dc.identifier.epage	847	en