SLOW DOWN EFFECT OF DEBRIS EXTRUSION ON SINGLE-ROOTED TEETH

Introduction During the instrumentation phase, despite having a strict control of the working length, one of the main problems that can arise is the extrusion of residues and intracanal irrigants towards the periradicular tissues. Objective The aim of this study is to compare the amount of extruded dentin debris during instrumentation using a new endodontic motor in two different functions. Methods 24 extracted premolars were divided into two groups. The cameral access was performed using a # 4 carbide ball bur, all samples were decoronated to standardize the working length at 17 mm. The samples were instrumented with .06 taper Nickel-Titanium Vortex Blue rotary files (Dentsply Maillefer, Ballaigues, Switzerland) with an E-Connect S. endodontic motor in two of its functions: Slow down and rotary. For the collection of extruded debris, Eppendorf tubes were used, which were weighed individually. After instrumentation, the samples were stored in an incubator at 70 ° C for 5 days to evaporate the distilled water, product of the irrigation, and later the tubes were weighed again by the same scale to obtain the final weight of the tubes with the extruded debris. Results When comparing the weight in grams of the amount of debris extruded during instrumentation with two different functions of the E connect S endodontic motor, using Ni Ti rotary files, Vortex Blue, it was observed that the slow down function produces a lower amount of debris, however there were no statistically significant differences between both groups. Conclusion Both functions of the E connect S endodontic motor produce dentin debris, however, it was observed that in the slow down function, the amount of apical debris extrusion is slightly lower.