Apically extruded debris using passive ul trasonic irrigation associated with different root canal irrigants

Abstract

The present study evaluated the amount of apically extruded debris after chemomechanical preparation (CMP) associated with passive ultrasonic irrigation (PUI) using four different root canal irrigants, namely, 6% sodium hypochlorite (NaOCl), 2% chlorhexidine gel + saline solution (2% CHXg+SS), 2% chlOrhexidine sOlutiOn (2% CHXs) and SS alone. Sixty mandibular premolars with single straight rOOt canals were selected and randOmly assigned into 4 groups (n=15) according tO the rOOt canal irrigant used as fOllOws: G1 (PUI + NaOCl), G2 (PUI + CHXg+SS), G3 (PUI+CHXs) and G4 (PUI+SS). Reciproc® R25 files (25/.08) were used during CMP and the debris extruded from each tooth were collected in pre-weighted Eppendorf tubes and dried. The average weight Of debris was assessed by using an analytical microbalance. Data were statistically analysed by using ANOVA and post-hoc Tukey’s test (α=0.05). Debris extrusion was Observed in all groups, irrespective Of the root canal irrigating, with 2% CHXg + SS being associated with lower debris extrusion compared to Other irrigants (p<0.05). NO significant differences were Observed between 6% NaOCl, 2% CHXs and SS. In cOnclusiOn, passive ultrasonic irrigation did not completely prevent apically extrusion of debris. PUI performed with 2% chlorhexidine gel + saline solution significantly minimized debris extrusion compared to 6% sodium hypochlorite, chlorhexidine solution and saline solution.