Effect of different separated nickel–titanium rotary instruments on apical microleakage: An in vitro study

Saudi Endodontic Journal

article

Roohollah Sharifi¹  Ehsan Heidarzadi¹  Ehsan Azizi²  Abbasali Khademi³  Saber Khazaei¹  Pedram Iranmanesh³ 

[1] Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences;Department of Microbiology, School of Medicine, Kermanshah University of Medical Sciences;Department of Endodontics, Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences

关键词: Dental instruments;    dental leakage;    Enterococcus faecalis;    nickel–titanium;    root canal therapy;   

DOI  :  10.4103/sej.sej_42_21

学科分类：口腔科学

来源: Medknow

【 摘 要 】

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.

【 授权许可】

CC BY-NC-SA