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CC BY 4.0 · Eur J Dent
DOI: 10.1055/s-0045-1812310
Original Article

Comparative Evaluation of Canal Centering Ability and Transportation of MiniKUT and TruNatomy Rotary File Systems in Curved Root Canals: A Cone-Beam Computed Tomographic Study

Authors

  • Hemant R. Chourasia 

    1   Division of Endodontics, Department of Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia

  • Mohammed Y. Tarrosh 

    1   Division of Endodontics, Department of Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia

  • Amani Alfaifi 

    2   College of Dentistry, Jazan University, Saudi Arabia

  • Kawther Alhazmi 

    2   College of Dentistry, Jazan University, Saudi Arabia

  • Fatima Khormi 

    2   College of Dentistry, Jazan University, Saudi Arabia

  • Ahmad H. Jabali 

    1   Division of Endodontics, Department of Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
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Abstract

Objectives

The current in vitro analysis was designed to compare the centering ability and transportation of MiniKUT and TruNatomy files on the curved mesiobuccal root of the mandibular first molars using cone-beam computed tomography (CBCT).

Materials and Methods

Thirty extracted mandibular first molars were randomly divided into two groups. In the first group, root canal instrumentation was performed by MiniKUT, and in the second group, TruNatomy rotary files were used. CBCT analysis of pre- and post-instrumented teeth was performed to check the canal transportation and centering ability at distances of 3, 6, and 9 mm from the root apex with the help of a prevalidated formula.

Statistical Analysis

Descriptive statistics were performed to calculate the mean and standard deviation. One-way ANOVA followed by post hoc Bonferroni correction was used to check the association at different levels. Pearson's correlation analysis was performed to assess the relationship between the groups.

Results

A significant association was reported with centering ability at 3, 6, and 9 mm (p = 0.001) across the groups. However, no significant association was reported with canal transportation at 3, 6, and 9 mm (p = 0.16) among both groups. TruNatomy showed higher transportation as compared to MiniKUT at 3 mm from the apex. Overall, the result suggests both files are safer to use in curved mandibular canals.

Conclusion

Both MiniKUT and TruNatomy files demonstrated minimal root canal transportation and maintained canal shape at 3, 6, and 9 mm from the apex. These characteristics suggest that both systems are safe and effective for the instrumentation of curved mandibular canals.

Keywords

centering ability - curved canal - cone-beam computed tomography - MiniKUT - root canal transportation - TruNatomy

Previous Presentation

A research poster was presented on the research day of the College of Dentistry, Jazan University, the same institution where the research was performed.


Institutional Review Board Approval

The ethical approval for this in vitro study was obtained from the Local Committee for Research Ethics, Jazan University (ref. no. HAPO-10-Z-001).


Data Availability Statement

The data are available on request from the corresponding author.




Publication History

Article published online:
07 November 2025

© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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