Comparison of root canal Transportation and Centering ability of Mtwo and Denco rotary files using cone beam computed tomography.

Document Type : Original Article

Authors

1 School of dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran

2 Department of periodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran,

3 Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran

4 Department of oral & maxillofacial Radiology, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran

10.22122/jids.2025.45620.1020

Abstract

Introduction: Root canal preparation is a crucial phase of endodontic therapy, significantly impacting treatment outcomes. One of the main procedural complications is canal transportation, defined as an unintended deviation from the original canal axis due to excessive or asymmetrical dentin removal. This study aimed to compare canal transportation and canal-centering ability of two rotary file systems, Mtwo and Denco, in mesio-buccal canals of extracted human mandibular molars with curvatures ranging from 20° to 40°, using cone-beam computed tomography (CBCT).
Materials and Methods: In this in vitro experimental study, fifty extracted mandibular molars with 20–40° curvature, measured by Schneider’s technique, were randomly assigned to two groups. The first group was instrumented with Mtwo rotary files and the second with Denco rotary files. CBCT scans were obtained before and after instrumentation at 1, 3, 5, and 7 mm from the apex. Canal transportation and centering ability were calculated and statistically analyzed using an independent t-test and Mann–Whitney U test.
Results: Across all examined levels, no statistically significant differences were found between Mtwo and Denco systems in terms of canal transportation and centering ability (P > 0.05).
Conclusion: Within the limitations of this study, Mtwo and Denco rotary file systems demonstrated comparable performance in preserving the original canal anatomy. Both systems can therefore be considered reliable and safe options for the preparation of curved root canals

Highlights

Mehdi Ziaei: PubMed, Google Scholar

Seyed Amir Hossein Hejazi: PubMed, Google Scholar

Saber Khazaei: PubMed, Google Scholar

Maryam Ghazizadeh: PubMed, Google Scholar