In Vitro Evaluation of Apical Debris Extrusion After the Root Canal Preparation with Gel Irrigants

During root canal instrumentation, debris can extrude through the apical foramen, causing postoperative pain and periapical inflammation.To investigate the influence of different auxiliary solutions in gel on the extrusion of debris through the apical foramen during root canal instrumentation.Thirty extracted mandibular premolars were randomly divided into three groups (n=10) based on the irrigant used: CHXg group (chlorhexidine 2% gel), NaOClg group (NaOCl 3% gel) and control group (NG: Natrosol gel).The teeth were placed in Eppendorf tubes containing 1.5% agar gel, the tube-agar sets were weighed before and after root canal instrumentation.Debris extrusion was quantified by the weight difference.Data were analyzed using analysis of variance (ANOVA), with P<0.05 considered significant.Apical debris extrusion was significantly influenced by the irrigant (P = 0.009), with lower extrusion in the CHXg and NG groups, which did not differ from each other, compared to the NaOClg group.All groups showed extrusion of debris through the apical foramen; however, the NaOClg group exhibited a greater amount of extruded material.