The effect of different reciprocating angles on debris extrusion produced by R-Motion files – An in vitro study

Abstract

Introduction: Extrusion of debris resulting from canal preparation is an important topic of interest for dentists. This study assessed the performance of the R-Motion (RM) and Reciproc Blue (RB) systems on extracted teeth, for both apically extruded debris and time of preparation. Materials and Methods: Sixty mandibular premolar teeth with straight match canal anatomy were indiscriminately allocated to one of the three groups: RM-WO (WaveOne ALL-mode), RM-R (Reciproc ALL-mode), and RB with glide path (R ALL-mode). The amount of extruded debris apically was collected in preweighed plastic laboratory tubes during treatment, and the procedure time was recorded. The mean values of extruded debris were calculated by subtracting the postinstrumentation weight of tubes from the preinstrumentation weight. The data were statistically analyzed using the one-way analysis of variance (ANOVA) and Tukey pairwise comparison tests. Results: Extrusion of debris was observed with all the samples. The RM group had less apical extrusion of debris compared to the RB group. Extruded debris in the RM-R group was numerically less than in the RM-WO group (P > 0.05) and significantly less than in the RB group (P < 0.05) (one-way ANOVA test; P < 0.05). In both motions, the preparation time required by RB was equal to that required by the RM file (One-way ANOVA test; P > 0.05). Conclusions: All samples showed extrusion of debris to some extent, irrespective of the motion used. RM-R was associated with the least amount of extruded debris.