Comparison of Apically Extruded Debris in maxillary premolars Using Neoniti A1, Reciproc and Only One File: An in vitro study

Apical extrusion of debris has been associated with postoperative pain, flare-up and delayed periapical healing. Studies reported that reciprocating instrumentation was associated with more debris extrusion than rotary instrumentation. The purpose of this study was to compare the amount of apically extruded debris using single-file rotary and reciprocating instrumentation systems.

Sixty human maxillary premolar teeth were randomly assigned to three groups (n = 20): Reciproc R25 (VDW, 25, 0.08), Neoniti A1 (NEOLIX, 25, 0.08), Only One File (Denco, 25, 0.08). Canal instrumentation was done according to the manufacturers’ instructions. Measurements of debris were measured by Montgomery method. Brown-Forsythe test, robust and Games-Howell post hoc test were used for data analysis (α=0.05).

The results of this study showed that the highest amount of debris extruded is in the Reciproc file and the lowest is in Neoniti A1. There was a significant difference between the means of the three groups (P˂0.05). Games-Howell post-hoc test was showed that there is a significant difference in pair by pair comparison of groups (P˂0.05).

Based on this in vitro study, all systems have some apical debris extrusion; however, it seems that rotary single-file instrumentation system was better than reciprocating single-file instrumentation systems in terms of the amount of debris extrusion.