Evaluation of Er: YAG laser and EDTAC on dentin adhesion of six endodontic sealers

ABSTRACT

The effect of ErYAG laser application and EDTAC on the adhesion of epoxy resin-based endodontic sealers to human dentin was evaluated in vitro. A total of 99 extracted human maxillary molars with their crowns worn flat were used. The teeth were divided into 3 groups group 1, the dentin surface received no treatment; group 2, EDTAC was applied to the dentin surface for 5 min; group 3, the dentin surface received ERYAG laser application (2.25 W potency; 11 mm focal distance; 4 Hz frequency; 200 mJ energy; 62 J total energy; 313 mean impulse). Three teeth from each group were analyzed by scanning electron microscopy for changes in dentin surface. The epoxy resin root canal sealers used were AH Plus©, Topseal©, Sealer 26©, AH 26, and Sealer Plus©. The zinc oxide eugenol-based sealer Fillcanal© was used as control. Adhesion was measured with a Universal testing machine. The results showed a statistically significant difference at the level of 1 per cent among the dentin treatments. The dentin treated with ErYAG laser showed greater adhesion with the sealers than dentin treated with EDTAC which was greater than dentin that received no treatment. The Tukey test showed the formation of 5 groups in decreasing order of adhesion AH Plus, Topseal and Sealer 26, AH 26, Sealer Plus, and Fillcanal (Grossman cement).