Extrusion of any debris during endodontic treatment may potentially cause post-operative complications such as flare-ups. The purpose of this in vitro study was to assess the amount of apically extruded debris during the root canal preparation using Neolix and One-Shape rotary systems.
Materials and Method: In this study, 20 extracted human mandibular first premolars were randomly assigned to 2 groups (n = 10 teeth/group). The root canals were instrumented according to the manufacturers instructions using the Neolix (Orikam) and One Shape (Micro-Mega) rotary instruments. The canals were then irrigated using normal saline. The debris and irrigant collection apparatus prepared was similar to that described by Meyers and Montgomery. The debris that was extruded apically was collected in preweighed eppendorf tubes and assessed with an electronic balance and compared.
Statistical Analysis Used: The debris extrusion was compared and statistically analyzed using Mann-Whitney U test.
Results: The One Shape rotary instruments produced significantly more debris compared with Neolix rotary instruments (P < 0.05).
Conclusions: Under the conditions of this study, all systems that were used resulted in extrusion of apical debris. One Shape rotary instruments produced significantly more debris compared with Neolix rotary instruments
