Year : 2016

Volume : Volume 6

Issue : Issue 3

Address for correspondence :
Gursandeep Kaur Sandhu
gursandeepk@gmail.com

Abstract

Background:  The aim of our in vitro study was to evaluate the amount of debris extruded apically during retreatment using Protaper retreatment files and Mtwo retreatment files and H file with solvent.  Materials and Method: Freshly extracted human 30 mandibular premolars were collected. Roots were prepared with hybrid technique and prepared teeth were then obturated with cold lateral condensation using gutta percha & zinc oxide eugenol sealer. All teeth were stored in the incubator at 37 degree Celsius and 100% humidity for 30 days. Preweight 1.0 ml of Eppendorf tube was used during the instrumentation procedure. 30 teeth were randomly assigned to 3 groups, 10 teeth in each. Gutta percha in all the three groups were removed with Protaper retreatment files, Mtwo rotary instruments and H files with tetrachloroethylene. Debris extruded, along with the irrigating solutions through apical foramina was collected in the Eppendorf tubes and incubator at 68 degree Celsius.   Results: The weight of the extruded debris was determined by subtracting the weight of the preweighed empty tubes from the weight of the tubes plus the dried debris. The mean weight of extruded debris was calculated for each group and then, analyzed statistically.  Conclusion: This is the graphical representation of the amount of extrusion of debris among three groups. It shows significant difference when we compare Protaper and H file and Mtwo with H file where as it shows non significant difference when we compare protaper and Mtwo.

Keywords: Retreatment, apical extrusion, debris, Mtwo retreatment files, Eppendorf tubes.