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Effect of Different Separated Nickel-Titanium Rotary Instruments on Apical Microleakage: An in Vitro Study Publisher



Sharifi R1 ; Heidarzadi E1 ; Azizi E2 ; Khademi A3 ; Khazaei S1 ; Iranmanesh P3
Authors
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Authors Affiliations
  1. 1. Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
  2. 2. Department of Microbiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
  3. 3. Department of Endodontics, Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Saudi Endodontic Journal Published:2022


Abstract

Introduction: Endodontic instrument separation is one of the iatrogenic errors which may affect the outcome of treatment. The present in vitro study was aimed to investigate the effect of different cross-sectional designs of separated nickel-titanium (Ni-Ti) rotary files on apical microleakage. Materials and Methods: A total of 48 mandibular premolar roots were selected. The samples were randomly assigned to four experimental groups including Mtwo (n = 10), HERO Shaper (n = 10), RaCe (n = 10), and FlexMaster (n = 10) as well as positive (n = 4) and negative (n = 4) control groups. Ni-Ti rotary instruments with the same size and taper (0.06, #30) were separated in the apical region after complete cleaning and shaping, and the remaining root canal was obturated with gutta-percha and AH-26 sealer. The bacterial microleakage of each group was assessed through Enterococcus faecalis for 60 days. Survival analysis was done by SPSS 22. Results: There were no statistically significant differences between the studied groups in terms of the time of microleakage (P = 0.955). Conclusion: The separated Ni-Ti rotary instruments with different cross-sectional designs had no impact on apical microleakage. © 2022 Saudi Endodontic Journal Published by Wolters Kluwer-Medknow.
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