Canal-Centering and Apical Transportation Ability of Similar Cross-Section NiTi Instruments Working with Different...

Area of Science:

• Endodontics
• Dental Materials Science
• Biomaterials

Background:

• Root canal preparation aims to clean and shape the canal space.
• Maintaining canal centering and minimizing apical transportation are crucial for successful endodontic treatment.
• Different file kinematics and cross-sections may influence preparation outcomes.

Purpose of the Study:

• To evaluate and compare the canal-centering and apical transportation abilities of three endodontic file systems.
• To assess the performance of Reciproc Blue (RB), Mtwo (M2), and OneShape (OS) in curved mesiobuccal canals.

Main Methods:

• Sixty human maxillary first molar mesiobuccal (MB) roots were divided into three groups for instrumentation.
• Micro-computed tomographic (micro-CT) analysis was performed pre- and post-instrumentation.
• Canal centering and apical transportation were measured at 3 mm, 6 mm, and 9 mm from the apex.

Main Results:

• OneShape (OS) exhibited significantly better canal-centering ability than Reciproc Blue (RB) and Mtwo (M2) at all measured depths.
• No statistically significant differences were found among the groups regarding apical transportation (P < 0.05).

Conclusions:

• The evaluated endodontic file systems effectively prepared curved MB canals with minimal apical transportation.
• OneShape (OS) demonstrated superior canal-centering capacity compared to the Reciproc Blue (RB) and Mtwo (M2) systems.