Cervical Microleakage of Canals with Resin Cement Using Chelating Solutions

Objective:The use of chelating solutions during root canal instrumentation aids the removal of smear layer and can help decrease microleakage. The objective of the present study was to evaluate, in vitro, cervical microleakage using different concentrations of the chelating solutions EDTA and CDTA and 17% EDTAC in root canals filled with epoxy resin cement.Methods:After instrumentation, 80 human maxillary canines were divided into 8 groups according to the final irrigation solution: group I - distilled water (control); group II - 1% EGTA; group III - 3% EGTA; group IV - 5% EGTA; group V - 1% CDTA; group VI - 3% CDTA; group VII - 5% CDTA; group VIII - 17% EDTAC. Each canal was irrigated at the end of instrumentation with 2 ml of the solution and was filled with gutta-percha and Sealer 26 resin cement by the lateral condensation technique. The teeth were immersed in India ink and after 15 days were decalcified and cleared for evaluation of microleakage using a measuring microscope.Results:Groups II, III, IV and V were statistically similar to the control group and were statistically different (at the level of 5%) from groups VI, VII and VIII.Conclusions: We conclude that the chelating solutions 3% and 5% CDTA and 17% EDTAC lead to less cervical microleakage than the other solutions tested.