Comparison of cyclic fatigue resistance and bending properties of two reciprocating nickel‐titanium glide path files

• Published in: International endodontic journal 2018-09, Vol.51 (9), p.1047-1052
• Main Authors: Özyürek, T., Uslu, G., Gündoğar, M., Yılmaz, K., Grande, N. M., Plotino, G.
• Format: Article
• Language: English
• Subjects: Alloys; bending resistance; cyclic fatigue; Data processing; Dental Pulp Cavity - surgery; Dentistry; Endodontics; Equipment Failure; Equipment Failure Analysis; Fractures; glide path; Humans; Materials fatigue; Microscopy, Electron, Scanning; Nickel; nickel‐titanium; reciprocating files; Root Canal Obturation - instrumentation; Scanning electron microscopy; Stainless steel; Wear resistance
• ISSN: 0143-2885; 1365-2591
• DOI: 10.1111/iej.12911

Aim To compare the cyclic fatigue resistance and bending properties of R‐Pilot and WaveOne Gold (WOG) Glider files, at intracanal temperature (35°C). Methodology Forty R‐Pilot and 40 WOG Glider files were subjected to a cyclic fatigue resistance test (n = 20), calculating the time to fracture (TTF) in an artificial stainless steel canal. The length of the fractured file tips (FL) was also measured. The fracture surface of fragments was examined with a scanning electron microscope, and the cross‐sectional area of the fractured surfaces was measured. Flexibility of the tested files (n = 20) was determined using 45° bending test. Data were analysed statistically using the Mann–Whitney U‐test at 5% significance level. Results Time to fracture was significantly higher in the R‐Pilot group compared to the WOG Glider (P