Cleaning effectiveness of different heat-treated rotary systems

Abstract

Objective: This study aimed to evaluate the cleaning efficacy of different rotary systems during root canal treatment.Methods: Forty-five extracted mandibular molars were randomly divided into three groups according to the rotary system applied: Group 1, EDMax; Group 2, EdgeFile X1; and Group 3, Neoniti. The samples were irrigated with 5.25% NaOCl and normal saline as the final rinse. Roots were sectioned longitudinally and examined under scanning electron microscopy (SEM). The debris and smear that remained in the root canals were assessed using a five-score index and compared between groups and root sections. The statistical analysis was performed by Kruskal-Wallis, Friedman, Wilcoxon Signed Ranks, and Mann-Whitney U tests at P 0.05). The sequential rotary EDMax group had more apical debris compared to the single-file reciprocating EdgeFile X1 and single-file rotary Neoniti groups (P0.05). However, the smear layer score was significantly greater in the apical than in other root sections in all groups (P<0.05).Conclusions: The single-file systems, Neoniti and EdgeFile X1, demonstrated superior cleaning efficacy compared to the sequential EDMax system in the apical third, whereas the efficacy of all systems was equivalent in other root areas. Single-file systems may be more effective for root canal cleaning, especially in areas that are more difficult to access.

Keywords

• debridement
• root canal preparation
• rotary file
• scanning electron microscope
• single file system
• smear layer