Effect of number of uses on the cyclic fatigue resistance of single-file rotary instruments

Year 2021, Volume: 4 Issue: 2, 176 - 180, 28.03.2021

Burçin Arıcan , Ayfer Atav Ateş

https://doi.org/10.32322/jhsm.862248

Cited By: 1

Abstract

Aim: The purpose of this study was to evaluate and compare the cyclic fatigue resistance of two different single file nickel-titanium instruments -Reciproc blue (RB) and One Curve (OC)- used for single or in a certain number of times.
Material and Methods: One Curve (n=40) and Reciproc Blue (n=40) files were used in this study. The instruments were divided into two subgroups (n=20); those to be used for the first time(N) and those that were previously used (U) in the clinic for the root canal treatment of a vital mandibular molar with three root canals. Cyclic fatigue testing of these instruments was performed in an artificial stainless-steel canal with 60° curvature, 5 mm radius 1.5 mm width, and 3.0 mm depth. All the tested files were rotated/reciprocated under the continuous irrigation with distilled water at 37°C until fracture occurred. The time to failure (TTF) in seconds and the number of cycles to failure (NCF) were recorded. Data were statistically analyzed and the significance level was set at P < 0.05.
Results: A significant difference was observed among the four groups and between RB-N/RB-U, OC-N/OC-U, RB-N/OC-N, and RB-U/OC-U, regarding TTF and NCF values (P < 0.05). Predicted time for % 99 survival were RB-N >RB-U > OC-N > OC-U. The TTF value of RB is greater than OC in both the new instrument groups and the used instrument groups.
Conclusions: RB showed higher cyclic fatigue resistance than OC files in both new and used instrument groups. Reuse of RB and OC instruments significantly reduced the cyclic fatigue resistance of the instrument.

Keywords

cyclic fatigue, nickel-titanium, Reciproc blue, One Curve, Single file

Supporting Institution

YOK

Project Number

YOK

Thanks

The authors thank VDW and Micro-Mega for providing instruments. The authors deny any conflict of interest related to this study

References

• Uslu G, Özyürek T, Yılmaz K, Plotino G. Effect of dynamic immersion in sodium hypochlorite and EDTA solutions on cyclic fatigue resistance of WaveOne and WaveOne gold reciprocating nickel-titanium Files. J Endod 2018; 44: 834-7.
• Ayfer A, ARICAN B. Effects of sodium hypochloride on cyclic fatigue resistance of Biorace rotary instrument with different tip sizes. Atatürk Üniversitesi Diş Hekimliği Fakültesi Derg2020; 20: 594-8.
• Capar ID, Ertas H, Arslan H. Comparison of cyclic fatigue resistance of novel nickel‐titanium rotary instruments. Aust Endod J 2015; 41: 24-8.
• Pedullà E, Grande NM, Plotino G, Gambarini G, Rapisarda E. Influence of continuous or reciprocating motion on cyclic fatigue resistance of 4 different nickel-titanium rotary instruments. J Endod 2013; 39: 258-61.
• Pedullà E, Benites A, La Rosa GM, et al. Cyclic fatigue resistance of heat-treated nickel-titanium instruments after immersion in sodium hypochlorite and/or sterilization. J Endod 2018; 44: 648-53.
• Yared G. Canal preparation using only one Ni‐Ti rotary instrument: preliminary observations. Int Endod J 2008; 41: 339-44.
• Smith A, McHugh S, Bagg J. A study of visual and blood contamination on reprocessed endodontic files from general dental practice. Br Dent J 2005; 199: 522-5.
• Plotino G, Grande N, Porciani P. Deformation and fracture incidence of R eciproc instruments: a clinical evaluation. Int Endod J 2015; 48: 199-205.
• VDW Brochure. Available at: https: //www.vdw-dental.com/fileadmin/Dokumente/Sortiment/Aufbereitung/Reziproke-Aufbereitung/RECIPROC-blue/VDW-Dental-RECIPROCblue-User-Brochure-EN.pdf. Accessed at 15 December 2020.
• One Curve Brochure. Available at: https: //micro-mega.com/wp-content/uploads/2020/2011/60301900-A_Flyer-One-Curve-Portfolio-EN_web.pdf. Accessed at 29 December 2020.
• 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.
• Bueno CSP, de Oliveira DP, Pelegrine RA, Fontana CE, Rocha DGP, da Silveira Bueno CE. Fracture incidence of WaveOne and Reciproc files during root canal preparation of up to 3 posterior teeth: a prospective clinical study. J Endod 2017; 43: 705-8.
• VDW brochure, (https: //www.vdw-dental.com/en/products/detail/reciproc/). Accessed at 13 December 2020.
• Gündoğar M, Özyürek T. Cyclic fatigue resistance of OneShape, HyFlex EDM, WaveOne Gold, and Reciproc Blue nickel-titanium instruments. J Endod 2017; 43: 1192-6.
• Viana A, Gonzalez B, Buono V, Bahia M. Influence of sterilization on mechanical properties and fatigue resistance of nickel–titanium rotary endodontic instruments. Int Endod J 2006; 39: 709-15.
• Pirani C, Paolucci A, Ruggeri O, et al. Wear and metallographic analysis of WaveOne and reciproc NiTi instruments before and after three uses in root canals. Scanning 2014; 36: 517-25.
• De-Deus G, Silva EJNL, Vieira VTL, et al. Blue thermomechanical treatment optimizes fatigue resistance and flexibility of the Reciproc files. J Endod 2017; 43: 462-6.
• Generali L, Puddu P, Borghi A, et al. Mechanical properties and metallurgical features of new and ex vivo used Reciproc Blue and Reciproc. Int Endod J 2020; 53: 250-64.
• Plotino G, Grande N, Testarelli L, Gambarini G. Cyclic fatigue of Reciproc and WaveOne reciprocating instruments. Int Endod J 2012; 45: 614-8.
• Vieira E, França E, Martins R, Buono V, Bahia M. Influence of multiple clinical use on fatigue resistance of ProTaper rotary nickel‐titanium instruments. Int Endod J 2008; 41: 163-72.
• Shen Y, Haapasalo M, Cheung GS-p, Peng B. Defects in nickel-titanium instruments after clinical use. Part 1: Relationship between observed imperfections and factors leading to such defects in a cohort study. J Endod 2009; 35: 129-32.
• Wu J, Lei G, Yan M, Yu Y, Yu J, Zhang G. Instrument separation analysis of multi-used ProTaper Universal rotary system during root canal therapy. J Endod 2011; 37: 758-63.
• Patturaja K, Leelavathi L, Jayalakshmi S. Choice of rotary instrument usage among endodontists – a questionnaire study. Biomed Pharmacol J 2018; 11: 851-7.
• Logsdon J, Dunlap C, Arias A, Scott R, Peters OA. Current trends in use and reuse of nickel-titanium engine-driven instruments: a survey of endodontists in the United States. J Endod 2020; 46: 391-6.
• Mozayeni MA, Golshah A, Kerdar NN. A survey on NiTi rotary instruments usage by endodontists and general dentist in Tehran. Iran Endod J 2011; 6: 168.
• Wolcott S, Wolcott J, Ishley D, et al. Separation incidence of protaper rotary instruments: a large cohort clinical evaluation. J Endod 2006; 32: 1139-41.
• Bahia MG, Buono VT. Decrease in the fatigue resistance of nickel-titanium rotary instruments after clinical use in curved root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2005; 100: 249-55.