Advertisement

Odontology

pp 1–8 | Cite as

Effect of autoclave sterilization on cyclic fatigue and torsional fracture resistance of NiTi rotary instruments

  • Wooyoung Kim
  • Soram Oh
  • Gil-Joo Ryu
  • Tae-Hwan Kim
  • Sung-Jae Kim
  • Dong-Hyung Kim
  • Bin-Na Lee
  • Kee-Yeon Kum
  • Seok Woo Chang
  • Ji-Hyun JangEmail author
Original Article
  • 11 Downloads

Abstract

The purpose of this study is to assess the effect of autoclave sterilization on the cyclic fatigue and torsional fracture resistance of ProTaper Universal (PTU), K3XF, HyFlex EDM (EDM), and TF adaptive (TFA). Sixty instruments from each file type were divided into two categories for cyclic fatigue group (CGr) and torsional fracture group (TGr). CGr and TGr were divided into three subgroups, respectively, consisting of ten instruments from each file type. Cyclic fatigue fracture test was performed using artificial canal made of stainless steel, and the mean number of cycles to failure (NCF) were determined. CGr1, the files were tested to establish baseline for NCF; CGr2, the files were tested cyclic fatigue after 10 cycles of autoclave; CGr3, instruments were autoclaved after being cycled to 25, 50, and 75% of corresponding NCF determined in CGr1, followed by cyclic fatigue test. The torsional fracture test was performed without autoclave (TGr1), after 3-cycle autoclave (TGr2), and 7-cycle autoclave (TGr3), respectively, which evaluated maximum torque and angular deflection. NCF, maximum torque and angular deflection were compared using one-way ANOVA with Bonferroni test. Two-way ANOVA was performed to determine the interaction between ‘autoclave treatment’ and ‘type of NiTi file’. EDM showed highest NCF within the same autoclave treatment. TFA presented the lowest maximum torque and the highest angular deflection, and PTU presented the lowest angular deflection. Within the same NiTi file systems, most of NCF, maximum torque and angular deflection of tested files were not significantly influenced by autoclave condition.

Keywords

Autoclave sterilization Cyclic fatigue fracture NiTi file Torsional fracture Heat treatment 

Notes

Acknowledgements

This research was supported by the Bio & Medical Technology Development Program of the National Research Foundation (NRF) & funded by the Korean government (MSIP&MOHW) (No. 2017M3A9E4048170).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Statement of clinical relevance

Multiple autoclave sterilization generally did not adversely affect the cyclic and torsional fracture resistance of ProTaper Universal, K3XF, TF Adaptive, and HyFlex EDM.

References

  1. 1.
    Zupanc J, Vahdat-Pajouh N, Schäfer E. New thermomechanically treated NiTi alloys—a review. Int Endod J. 2018;51:1088–103.CrossRefGoogle Scholar
  2. 2.
    McCormick PG, Liu Y. Thermodynamic analysis of the martensitic transformation in NiTi-II. Effect of transformation cycling. Acta Metall Mater. 1994;42:2407–13.CrossRefGoogle Scholar
  3. 3.
    Frick CP, Ortega AM, Tyber J, Maksound AEM, Maier HJ, Liu Y, et al. Thermal processing of polycrystalline NiTi shape memory alloys. Mater Sci Eng A. 2005;405:34–49.CrossRefGoogle Scholar
  4. 4.
    Ha JH, Kim SK, Cohenca N, Kim HC. Effect of R-phase heat treatment on torsional resistance and cyclic fatigue fracture. J Endod. 2013;39:389–93.CrossRefGoogle Scholar
  5. 5.
    Pedulla E, Lo Savio F, Boninelli S, Plotino G, Grande NM, La Rosa G, et al. Torsional and cyclic fatigue resistance of a new nickel-titanium instrument manufactured by electrical discharge machining. J Endod. 2016;42:156–9.CrossRefGoogle Scholar
  6. 6.
    Kaval ME, Capar ID, Ertas H. Evaluation of the cyclic fatigue and torsional resistance of novel nickel-titanium rotary files with various alloy properties. J Endod. 2016;42:1840–3.CrossRefGoogle Scholar
  7. 7.
    Goo HJ, Kwak SW, Ha JH, Pedulla E, Kim HC. Mechanical properties of various heat-treated nickel-titanium rotary instruments. J Endod. 2017;43:1872–7.CrossRefGoogle Scholar
  8. 8.
    Özyürek T, Keskin NB, Furuncuoglu F, Inan U. Comparison of cyclic fatigue life of nickel-titanium files: an examination using high-speed camera. Restor Dent Endod. 2017;42:224–31.CrossRefGoogle Scholar
  9. 9.
    Zhao D, Shen Y, Peng B, Haapasalo M. Effect of autoclave sterilization on the cyclic fatigue resistance of thermally treated Nickel-Titanium instruments. Int Endod J. 2016;49:990–5.CrossRefGoogle Scholar
  10. 10.
    Pun DK, Berzins DW. Corrosion behavior of shape memory, superelastic, and non superelastic nickel-titanium-based orthodontic wires at various temperatures. Dent Mater. 2008;24:221–7.CrossRefGoogle Scholar
  11. 11.
    Nair AS, Tilakchand M, Naik BD. The effect of multiple autoclave cycles on the surface of rotary nickel-titanium endodontic files: an in vitro atomic force microscopy investigation. J Conserv Dent. 2015;18:218–22.CrossRefGoogle Scholar
  12. 12.
    Spagnuolo G, Ametrano G, D’Antò V, Rengo C, Simeone M, Riccitiello F, et al. Effect of autoclaving on the surfaces of TiN -coated and conventional nickel-titanium rotary instruments. Int Endod J. 2012;45:1148–55.CrossRefGoogle Scholar
  13. 13.
    Plotino G, Costanzo A, Grande NM, Petrovic R, Testarelli L, Gambarini G. Experimental evaluation on the influence of autoclave sterilization on the cyclic fatigue of new nickel-titanium rotary instruments. J Endod. 2012;38:222–5.CrossRefGoogle Scholar
  14. 14.
    Özyürek T, Yilmaz K, Uslu G. The effects of autoclave sterilization on the cyclic fatigue resistance of ProTaper Universal, ProTaper Next, and ProTaper Gold nickel-titanium instruments. Restor Dent Endod. 2017;42:301–8.CrossRefGoogle Scholar
  15. 15.
    Hilfer PB, Bergeron BE, Mayerchak MJ, Roberts HW, Jeansonne BG. Multiple autoclave cycle effects on cyclic fatigue of nickel-titanium rotary files produced by new manufacturing methods. J Endod. 2011;37:72–4.CrossRefGoogle Scholar
  16. 16.
    Shim KS, Oh S, Kum K, Kim YC, Jee KK, Chang SW. Mechanical and mtallurgical properties of various nickel-titanium rotary instruments. Biomed Res Int. 2017;2017:4528601.CrossRefGoogle Scholar
  17. 17.
    Higuera O, Plotino G, Tocci L, Carrillo G, Gambarini G, Jaramillo DE. Cyclic fatigue resistance of 3 different nickel-titanium reciprocating instruments in artificial canals. J Endod. 2015;41:913–5.CrossRefGoogle Scholar
  18. 18.
    Casper RB, Roberts HW, Roberts MD, Himel VT, Bergeron BE. Comparison of autoclaving effects on torsional deformation and fracture resistance of three innovative endodontic file systems. J Endod. 2011;37:1572–5.CrossRefGoogle Scholar
  19. 19.
    King JB, Roberts HW, Bergeron BE, Mayerchak MJ. The effect of autoclaving on torsional moment of two nickel-titanium endodontic files. Int Endod J. 2012;45:156–61.CrossRefGoogle Scholar
  20. 20.
    Bulem ÜK, Kececi AD, Guldas HE. Experimental evaluation of cyclic fatigue resistance of four different nickel-titanium instruments after immersion in sodium hypochlorite and/or sterilization. J Appl Oral Sci. 2013;21:505–10.CrossRefGoogle Scholar
  21. 21.
    Arias A, Macorra JC, Govindjee S, Peters OA. Correlation between temperature-dependent fatigue resistance and differential scanning calorimetry analysis for 2 contemporary rotary instruments. J Endod. 2018;44:630–4.CrossRefGoogle Scholar
  22. 22.
    Plotino G, Grande NM, Mercadé Bellido M, Testarelli L, Gambarini G. Influence of temperature on cyclic fatigue resistance of ProTaper Gold and ProTaper Universal rotary files. J Endod. 2017;43:200–2.CrossRefGoogle Scholar
  23. 23.
    Thompson SA. An overview of nickel-titanium alloys used in dentistry. Int Endod J. 2000;33:297–310.CrossRefGoogle Scholar
  24. 24.
    Iacono F, Pirani C, Generali L, Bolelli G, Sassatelli P, Lusvarghi L, et al. Structural analysis of HyFlex EDM instruments. Int Endod J. 2017;50:303–13.CrossRefGoogle Scholar
  25. 25.
    Shen Y, Zhou HM, Wang Z, Campbell L, Zheng YF, Haapasalo M. Phase transformation behavior and mechanical properties of thermomechanically treated K3XF nickel-titanium instruments. J Endod. 2013;39:919–23.CrossRefGoogle Scholar
  26. 26.
    Hieawy A, Haapasalo M, Zhou H, Wang Z-J, Shen Y. Phase transformation behavior and resistance to bending and cyclic fatigue of ProTaper Gold and ProTaper universal instruments. J Endod. 2015;41:1134–8.CrossRefGoogle Scholar
  27. 27.
    Pruett JP, Clement DJ, Carnes DL Jr. Cyclic fatigue testing of nickel-titanium endodontic instruments. J Endod. 1997;23:77–85.CrossRefGoogle Scholar
  28. 28.
    Yilmaz K, Uslu G, Özyürek T. Effect of multiple autoclave cycles on the surface roughness of HyFlex CM and HyFlex EDM files: an atomic force microscopy study. Clin Oral Investig. 2018;22:2975–80.CrossRefGoogle Scholar
  29. 29.
    Wycoff RC, Berzins DW. An in vitro comparison of torsional stress properties of three different rotary nickel-titanium files with a similar cross-sectional design. J Endod. 2012;38:1118–20.CrossRefGoogle Scholar
  30. 30.
    Gambarini G, Grande NM, Plotino G, Somma F, Garala M, De Luca M, et al. Fatigue resistance of engine-driven rotary nickel-titanium instruments produced by new manufacturing methods. J Endod. 2008;34:1003–5.CrossRefGoogle Scholar
  31. 31.
    Yum J, Cheung GS, Park JK, Hur B, Kim HC. Torsional strength and toughness of nickel-titanium rotary files. J Endod. 2011;37:382–6.CrossRefGoogle Scholar

Copyright information

© The Society of The Nippon Dental University 2019

Authors and Affiliations

  1. 1.Department of Conservative Dentistry, Graduate SchoolKyung Hee UniversitySeoulRepublic of Korea
  2. 2.Department of Conservative Dentistry, School of DentistryKyung Hee UniversitySeoulRepublic of Korea
  3. 3.GoodWill Dental HospitalBusanRepublic of Korea
  4. 4.Department of Conservative Dentistry, School of DentistryDental Science Research Institute, Chonnam National UniversityGwang-juRepublic of Korea
  5. 5.Seoul National University Dental Hospital for Persons with Special Needs, National Dental Care Center for Persons with Special Cares, Department of Conservative DentistryDental Research Institute, Seoul National University Dental Hospital, Seoul National University School of DentistrySeoulRepublic of Korea

Personalised recommendations