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Effect of heat treatment on the cyclic fatigue resistance of NiTi endodontic openers

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VOLUME 9 - NUMBER 1 - 2018 Effect of heat treatment on the cyclic fatigue resistance of NiTi endodontic openers
  • Di Nardo D., Morese A.., Ferri V., Obino F.V., Seracchiani M., Testarelli L.
  • Original Article, 24-26
  • Full text PDF
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Aim: Aim of the present study is to evaluate if a thermal treatment adopted for endodontic NiTi instruments could increase their cyclic fatigue lifespan.

Methods: 25 thermally treated One Flare (MM, Besancon, France) and 25 non-thermally treated Endo Flare (MM, Besancon, France) were mechanically rotated in a precurved artificial canal until fracture. Differences between Time to Fracture (TTF) and Fragment Length (FL) were statistically analyzed (Student’s t test, (p<0.05).

Results: One Flare’s time to fracture (47.24 seconds; SD±4.24) was significantly longer when compared to Endo Flare’s (21.2 seconds; SD±3.08) at the same operating conditions (p<0.005). Differences between the length of fractured segments showed no statistical significance differences (p>0.005).

Conclusions: Heat treated NiTi alloy showed an improved time to fracture when compared to a non-thermally treated one at the same operating conditions. Thermal treatments could enhance the characteristics of NiTi improving the lifespan of rotary endodontic instruments.

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Authors

D. Di Nardo

A. Morese

V. Ferri

F. V. Obino

M. Seracchiani

L. Testarelli

How to Cite
Di Nardo, D., Morese , A., Ferri , V., Obino , F. V., Seracchiani , M., & Testarelli , L. (2022). Effect of heat treatment on the cyclic fatigue resistance of NiTi endodontic openers. Annali Di Stomatologia, 9(1), 24–26. https://doi.org/10.59987/ads/2018.1.24-26

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