Comparison between a Novel Nickel-Titanium Alloy and 508 Nitinol on the Cyclic Fatigue Life of ProFile 25/.04 Rotary Instruments

Eugenia Johnson, Adam Lloyd, Sergio Kuttler, Kenneth Namerow

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

ProFile® 25/.04 instruments manufactured from three variants of Nitinol (1A, 1B & 2AS) were compared with stock production ProFile 25/.04 instruments and fatigue tested to failure. Cyclic fatigue testing was performed by rotating instruments at 300 RPM in a simulated steel root canal with 5 mm radius and 90° curve until instrument separation. Time to failure was recorded. Torsion testing was undertaken by clamping 3 mm of each instrument tip between brass plates and rotating it at 2 RPM until failure. Data were recorded for torque and angle at fracture. Statistical differences were found with nickel-titanium variant 1B (M-Wire™ NiTi) nearly 400% more resistant to cyclic fatigue than stock ProFile 25/.04 (P < .001). Torsion testing found differences between all 508 Nitinol groups and M-Wire™ NiTi (P < .001). ProFile 25/.04 files manufactured from M-Wire™ NiTi have significantly greater resistance to cyclic fatigue while maintaining comparable torsional properties.

Original languageEnglish (US)
Pages (from-to)1406-1409
Number of pages4
JournalJournal of Endodontics
Volume34
Issue number11
DOIs
StatePublished - Nov 1 2008
Externally publishedYes

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Fatigue
Dental Pulp Cavity
Steel
Torque
Constriction
nitinol

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Cite this

Comparison between a Novel Nickel-Titanium Alloy and 508 Nitinol on the Cyclic Fatigue Life of ProFile 25/.04 Rotary Instruments. / Johnson, Eugenia; Lloyd, Adam; Kuttler, Sergio; Namerow, Kenneth.

In: Journal of Endodontics, Vol. 34, No. 11, 01.11.2008, p. 1406-1409.

Research output: Contribution to journalArticle

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