Skip to main content
Log in

Variable impact by ambient temperature on fatigue resistance of heat-treated nickel titanium instruments

  • Original Article
  • Published:
Clinical Oral Investigations Aims and scope Submit manuscript

Abstract

Objectives

The purpose of this study was to evaluate the effect of different ambient temperatures on cyclic fatigue (CF) life of two NiTi rotary systems and correlate the results with martensitic transformation temperatures.

Materials and methods

Heat-treated NiTi Vortex Blue (VB) and EdgeSequel Sapphire (SP) instruments (tip sizes no. 20, 25, 30, 35, 40) were tested for CF resistance at room and body temperature (n = 20 each group) in a simulated canal (angle of curvature 60°; radius 3 mm; center from instrument tip 4.5 mm) with a motor controlled by an electric circuit. Mean half-life, beta and eta Weibull parameters were determined and compared. Two further instruments of each brand were subjected to differential scanning calorimetry (DSC).

Results

Temperature had an effect on fatigue behavior: all instruments lasted significantly longer at room than at body temperature. All VB significantly outlasted those of SP at body temperature; while smaller diameters of VB (size no. 20) were also significantly more resistant than SP when tested at room temperature; SP with larger diameters (sizes no. 30, no. 35, and no. 40) lasted significantly longer than VB did.

Conclusions

Immersion in water at body temperature was associated with a marked decrease in the fatigue life of all rotary instruments tested. VB instruments were significantly more CF resistant at body temperature and showed the highest predictability in terms of fracture resistance.

Clinical relevance

Rotary instruments manufactured with different post-machining heat treatment responded differently to changed ambient temperatures. DSC assessment of martensitic conversion temperatures helps to predict the behavior of nickel titanium rotaries in different environments.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or Ebook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

  1. Walia HM, Brantley WA, Gerstein H (1988) An initial investigation of the bending and torsional properties of nitinol root canal files. J Endod 14:346–351

    Article  PubMed  Google Scholar 

  2. Pettiette MT, Delano EO, Trope M (2001) Evaluation of success rate of endodontic treatment performed by students with stainless-steel K-files and nickel-titanium hand files. J Endod 27:124–127

    Article  PubMed  Google Scholar 

  3. Spili P, Parashos P, Messer HH (2005) The impact of instrument fracture on outcome of endodontic treatment. J Endod 31:845–850

    Article  PubMed  Google Scholar 

  4. Sattapan B, Nervo GJ, Palamara JE, Messer HH (2000) Defects in rotary nickel-titanium files after clinical use. J Endod 26:161–165

    Article  PubMed  Google Scholar 

  5. Ullmann CJ, Peters OA (2005) Effect of cyclic fatigue on static fracture loads in ProTaper nickel-titanium rotary instruments. J Endod 31:183–186

    Article  PubMed  Google Scholar 

  6. Zhang EW, Cheung GSP, Zheng YF (2010) Influence of cross-sectional design and dimension on mechanical behavior of nickel-titanium instruments under torsion and bending: a numerical analysis. J Endod 36:1394–1398

    Article  PubMed  Google Scholar 

  7. Pruett JP, Clement DJ, Carnes DL (1997) Cyclic fatigue testing of nickel-titanium endodontic instruments. J Endod 23:77–85

    Article  PubMed  Google Scholar 

  8. Jamleh A, Yahata Y, Ebihara A, Atmeh AR, Bakhsh T, Suda H (2016) Performance of NiTi endodontic instrument under different temperatures. Odontology 104:324–328

    Article  PubMed  Google Scholar 

  9. Plotino G, Grande NM, Mercade Bellido M, Testarelli L, Gambarini G (2017) Influence of temperature on cyclic fatigue resistance of ProTaper Gold and ProTaper Universal rotary files. J Endod 43:200–202

    Article  PubMed  Google Scholar 

  10. Dosanjh A, Paurazas S, Askar M (2017) The effect of temperature on cyclic fatigue of nickel-titanium rotary endodontic instruments. J Endod 43:823–826

    Article  PubMed  Google Scholar 

  11. de Vasconcelos RA, Murphy S, Carvalho CA, Govindjee RG, Govindjee S, Peters OA (2016) Evidence for reduced fatigue resistance of contemporary rotary instruments exposed to body temperature. J Endod 42:782–787

    Article  PubMed  Google Scholar 

  12. EdgeEndo. EdgeSequel™ Sapphire. Twice as good. Half the cost. https://edgeendo.com/edgesequel/. Accessed March 2, 2018

  13. EdgeEndo. EdgeSequel™ heat treated Fire-Wire™ NiTi. https://edgeendo.com/wp-content/uploads/2015/08/DFU-Sequel-Sapphire4.pdf. Accessed March 2, 2018

  14. Directions for use. Vortex Blue rotary files. https://www.dentsplysirona.com/content/dam/dentsply/pim/manufacturer/Endodontics/Glide_Path__Shaping/Rotary__Reciprocating_Files/Shaping/Vortex_Blue_Rotary_Files/Vortex-Blue-ayg107i-en-1402. Accessed March 2, 2018

  15. Arias A, Perez-Higueras JJ, de la Macorra JC (2014) Influence of clinical usage of GT and GTX files on cyclic fatigue resistance. Int Endod J 47:257–263

    Article  PubMed  Google Scholar 

  16. de Hemptinne F, Slaus G, Vandendael M, Jacquet W, De Moor RJ, Bottenberg P (2015) In vivo intracanal temperature evolution during endodontic treatment after the injection of room temperature or preheated sodium hypochlorite. J Endod 41:1112–1115

    Article  PubMed  Google Scholar 

  17. Zeltner M, Peters OA, Paque F (2009) Temperature changes during ultrasonic irrigation with different inserts and modes of activation. J Endod 35:573–577

    Article  PubMed  Google Scholar 

  18. Sonntag D, Raab WH, Martin E, Keppel R (2017) Intracanal use of heated rinsing solutions: a pilot study. Quintessence Int 48:281–285

    PubMed  Google Scholar 

  19. Sirtes G, Waltimo T, Schaetzle M, Zehnder M (2005) The effects of temperature on sodium hypochlorite short-term stability, pulp dissolution capacity, and antimicrobial efficacy. J Endod 31:669–671

    Article  PubMed  Google Scholar 

  20. Vera J, Ochoa-Rivera J, Vazquez-Carcaño M, Romero M, Arias A, Sleiman P (2015) Effect of intracanal cryotherapy on reducing root surface temperature. J Endod 41:1884–1887

    Article  PubMed  Google Scholar 

  21. Vera J, Ochoa J, Romero M, Vazquez-Carcaño M, Ramos-Gregorio CM, Aguilar RR, Cruz A, Sleiman P, Arias A (2018) Intracanal cryotherapy reduces postoperative pain in teeth with symptomatic apical periodontitis: a randomized multicenter clinical trial. J Endod 44:4–8

    Article  PubMed  Google Scholar 

  22. Nguyen HH, Fong H, Paranjpe A, Flake NM, Johnson JD, Peters OA (2014) Evaluation of the resistance to cyclic fatigue among ProTaper Next, ProTaper Universal, and Vortex Blue rotary instruments. J Endod 40:1190–1193

    Article  PubMed  Google Scholar 

  23. Hieawy A, Haapasalo M, Zhou H, Wang ZJ, Shen Y (2015) Phase transformation behavior and resistance to bending and cyclic fatigue of ProTaper Gold and ProTaper Universal instruments. J Endod 41:1134–1138

    Article  PubMed  Google Scholar 

  24. Braga LC, Faria Silva AC, Buono VT, de Azevedo Bahia MG (2014) Impact of heat treatments on the fatigue resistance of different rotary nickel-titanium instruments. J Endod 40:1494–1497

    Article  PubMed  Google Scholar 

  25. Plotino G, Grande NM, Cotti E, Testarelli L, Gambarini G (2014) Blue treatment enhances cyclic fatigue resistance of vortex nickel-titanium rotary files. J Endod 40:1451–1453

    Article  PubMed  Google Scholar 

  26. Plotino G, Al-Sudani D, Pulino S, Grande NM, Marcoli PA, Pizzi S et al (2012) Cyclic fatigue resistance of Mtwo NiTi rotary instruments used by experienced and novice operators—an in vivo and in vitro study. Med Sci Monit 18:MT41–MT45

    Article  PubMed  PubMed Central  Google Scholar 

  27. Abernethy RB (2006). The New Weibull Handbook. Reliability and statistical analysis for predicting life, safety, survivability, risk, cost and warranty claims, 5th ed. North Palm Beach, FL

Download references

Acknowledgments

This study was performed in partial fulfillment of the requirements for a MSD degree for Dr. Hejlawy and was supported by the AAE Foundation. Dr. OA Peters serves as a consultant for Dentsply Sirona whose support for this study is also acknowledged.

Funding

The work was supported by the AAE foundation.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ana Arias.

Ethics declarations

Conflict of interest

Dr. Ove Peters serves as a consultant for Dentsply Sirona. The remaining authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

For this type of study, formal consent is not required.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Arias, A., Hejlawy, S., Murphy, S. et al. Variable impact by ambient temperature on fatigue resistance of heat-treated nickel titanium instruments. Clin Oral Invest 23, 1101–1108 (2019). https://doi.org/10.1007/s00784-018-2543-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00784-018-2543-6

Keywords

Navigation