Efficacy of different endodontic irrigation protocols on shear bond strength to coronal dentin.

AIM

The purpose of this study was to evaluate the effect of etidronic acid on bond strength to coronal dentin.

MATERIALS AND METHODS

A total of 75 human mandibular molars were sectioned 3 mm below the occlusal surface and then randomly divided into five groups according to irrigation solution used ( = 15): Group 1: 5 ml 2.5% sodium hypochlorite (NaOCl) +5 ml distilled water; Group 2: 5 ml 2.5% NaOCl + 5 ml 17% ethylenediaminetetraacetic acid (EDTA); Group 3: 10 ml mixture of 5% NaOCl and 18% 1-hydroxyethylidene-1,1-bisphosphonate (HEBP); Group 4: 5 ml mixture of 5% NaOCl and 18% HEBP + 5 ml 17% EDTA; and Group 5: 5 ml mixture of 5% NaOCl and 18% HEBP + 5 ml distilled water. Thereafter, Clearfil SE bond was applied to the dentin surfaces and then, composite build-ups were created using Tygon tubes for the microshear bond strength test. Data were analyzed using the one-way analysis of variance and Tukey test.

RESULTS

When compared to Groups 3, 4, and 5, Groups 1 and 2 showed significantly higher bond strength values ( < 0.05). However, there was no statistically significant difference between Groups 1 and 2 and between Groups 3, 4, and 5 ( > 0.05).

CONCLUSION

HEBP adversely affected the bond strength of the tested adhesive to coronal dentin.