Title

Cutting efficiency of two heat-treated files in rotation and reciprocation motions

Document Type

Article

Publication Date

2021

Abstract

Abstract

Background: This study aimed at assessing the effect of different kinematics as well as different instrument designs on efficiency of cutting of two heat-treated nickel–titanium systems. Forty resin canals with 30°-angle of curvature and a length of 16 mm were utilized in this research. They were divided into four groups depending on the instru- ment and the operating kinematic, group I; Azure rotary system in rotation motion, group II; Azure rotary system in Reciprocation motion, group III; Fanta AF One rotary system in rotation motion and group IV; Fanta AF One rotary system in reciprocation motion. Blocks were labeled and then weighed pre- and post-preparation with delta weight (Δ wt = wt pre − wt post) and data were documented for statistics evaluation.

Results: Resin canals prepared using Fanta AF One rotary system showed significantly higher weight loss than Azure rotary system in both rotation and reciprocation (P < 0.001). Insignificant difference was reported for rotation and reciprocation movements in both file systems.

Conclusion: The instrument’s cross section revealed a more significant impact on cutting efficiency than the motion used.

Keywords: Rotation, Reciprocation, Cutting efficiency, Heat treatment

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