Biomedical Research

All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.
Reach Us +1 504 6082390

Research Article - Biomedical Research (2017) Volume 28, Issue 2

Apical transportation of nickel-titanium rotary Mtwo and RaCe instruments compared with conventional stainless steel hand instruments

Introduction: Apical transportation is an important iatrogenic damage in endodontics. This study evaluates the transportation caused by two nickel-titanium (NiTi) rotary instruments compared with a stainless steel hand instrument.

Materials and Methods: This in vitro experimental study was performed on 51 simulated canals with a 40° curvature angle, fabricated within transparent and hard polyester resin. The groups consisted of KFile stainless steel hand-instrument (n=15), RaCe NiTi rotary file (n=18), and Mtwo NiTi rotary file (n=18). Canals were instrumented according to the protocols recommended by manufacturers. Extents of apical transportation were measured on digital scanned and standardized images. Data were compared by ANOVA.

Results: The groups had a significant difference (P<0.001). Tukey test showed that the difference between the rotary instruments was insignificant, while the difference between each of them and K-file was significant (P <0.05).

Conclusion: Apical transportation caused by the stainless steel hand instruments is much greater than that of nickel titanium rotary instruments RaCe and Mtwo. Both rotary systems act alike.

Author(s): Gholamreza Rezvani, Orkideh Radmehr, Kourosh Shahverdiani

Abstract Full Text PDF