Cyclic fatigue testing of ProTaper Universal and ProTaper Next rotary instruments of different diameters-Reference-Cited by-同舟云学术

Cyclic fatigue testing of ProTaper Universal and ProTaper Next rotary instruments of different diameters

Published:2023 Issue:3 Volume:70 Page:117-123
ISSN:0039-1743
Container-title:Serbian Dental Journal
language:en
Short-container-title:SERBIAN DENT J

Author:

Stosic Nenad¹^ORCID,Popovic Jelena¹,Nikolic Marija¹^ORCID,Mitic Aleksandar¹,Barac Radomir¹^ORCID,Igic Marko²^ORCID,Petrovic Milica³^ORCID,Stankovic Antonije⁴^ORCID,Milovanovic Aleksandra⁴,Vulovic Marija⁴

Affiliation:

1. University of Niš, Faculty of Medicine, Niš, Serbia + Clinic for Dental Medicine, Department of Restorative Dentistry and Endodontics, Niš, Serbia

2. University of Niš, Faculty of Medicine, Niš, Serbia + Clinic for Dental Medicine, Department of Prosthodontics, Niš, Serbia

3. University of Niš, Faculty of Medicine, Niš, Serbia + Clinic for Dental Medicine, Department of Oral Medicine and Periodontology, Niš, Serbia

4. University of Niš, Faculty of Medicine, Niš, Serbia

Abstract

Introduction. Sudden fracture of instruments without previous warning signs, which occurs due to cyclic and torsional fatigue, represents the biggest problem and one of the most difficult complications during endodontic therapy. The aim of this research was to check the influence of diameter of the instruments on the appearance of cyclic fatigue in simulated canals in full rotation. Material and Method. The study analyzed 24 ProTaper Universal instruments (12 instruments with a diameter of 25 and 12 instruments with a diameter of 30) and 24 ProTaper Next instruments (12 instruments with a diameter of 25 and 12 instruments with a diameter of 30). The instruments were tested in an artificial canal stuffed in a metal block at an angle of 45? and a corner radius of 5 mm. The operating time of each instrument until fracture was measured, and then the number of cycles to fracture (NCF) was calculated. The length of the fractured fragments (FL) was measured with a Vernier caliper. Results. The number of cycles to fracture was higher (p < 0.001) in instruments of the ProTaper Universal group of diameter 25 (367.83 ? 17.00) compared to instruments of diameter 30 (329.33 ? 12.86) of the same group. The number of cycles leading to the fracture in instruments of the ProTaper Next group of diameter 25 (1189.33 ? 18.97) was higher (p < 0.001) compared to instruments of the same group of diameter 30 (971.08 ? 15.26). Conclusion. Obtained results indicated that with an increase in the diameter of rotating endodontic instruments, there is a decrease in the resistance to cyclic fatigue.

Publisher

National Library of Serbia

Subject

General Medicine,General Chemistry

Reference23 articles.

1. Pietrzycka K, Radwanski M, Hardan L, Bourgi R, Mancino D, Haikel Y, et al. The Assessment of Quality of the Root Canal Filling and the Number of Visits Needed for Completing Primary Root Canal Treatment by Operators with Different Experience. Bioengineering (Basel). 2022;9(9):468. [DOI: 10.3390/bioengineering9090468] [PMID: 36135014]

2. Uygun AD, Unal M, Falakaloğlu S, Guven Y. Comparison of the CyclicFatigue Resistance HyFlex EDM, Vortex Blue, ProTaper Gold and OneCurve Nickel-Titanium Instruments. Niger J Clin Pract. 2020;23(1):41-5. [DOI: 10.4103/njcp.njcp_343_19] [PMID: 31929205]

3. Rubio J, Zarzosa JI, Pallares A. A Comparative Study of Cyclic Fatigue of 10 Different Types of Endodontic Instruments: an in Vitro Study. Acta Stomatol Croat. 2019;53(1):28-36. [DOI: 10.15644/asc53/1/3] [PMID: 31118530]

4. Huang X, Shen Y, Wei X, Haapasalo M. Fatigue Resistance of Nickeltitanium Instruments Exposed to High-concentration Hypochlorite. J Endod. 2017;43(11):1847-51. [DOI: 10.1016/j.joen.2017.06.033] [PMID: 28951027]

5. Cheung GS, Peng B, Bian Z, Shen Y, Darvell BW. Defects in ProTaper S1 instruments after clinical use: fractographic examination. Int Endod J. 2005;38(11):802-9. [DOI: 10.1111/j.1365-2591.2005.01020.x] [PMID: 16218972]