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Year : 2017  |  Volume : 14  |  Issue : 4  |  Page : 181-186

Effect of different root canal disinfection protocols on push-out bond strength of two endodontic sealers

Department of Endodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt

Correspondence Address:
Walaa M Ghoneim
Department of Endodontics, Faculty of Dentistry, Tanta University, Tanta
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/tdj.tdj_40_17

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Introduction The purpose of this study was to evaluate push-out bond strength of two endodontic sealers (MetaSeal, Endosequence BC) to radicular dentin following different disinfection protocols [sodium hypochlorite (NaOCl), photoactivated disinfection, and ozonated olive oil]. Materials and methods A total of 60 freshly extracted human single rooted premolars with single root canals were selected. The crowns were removed to obtain a standardized root length of 15 mm and working length was determined. Root canals were prepared using ProTaper Universal rotary instruments up to F4 and irrigation throughout instrumentation was performed using 3 ml of 0.9% sodium chloride. Roots were randomly divided into six groups (n=10). In groups 1 and 2, root canals were finally irrigated with 3 ml of 2.5% NaOCl (as control groups), in groups 3 and 4, final disinfection protocol was performed with photoactivated disinfection, but in groups 5 and 6, root canals were finally disinfected by coating ProTaper F4 file with ozonated olive oil. In groups 1, 3, and 5, root canals were obturated with gutta-percha/MetaSeal sealer while in groups 2, 4, and 6, obturation was performed using gutta-percha/Endosequence BC sealer. Three horizontal sections were prepared in a thickness of 2 mm each corresponding to apical, middle, and coronal parts of the root. Each section was subjected to a compressive load to evaluate push-out bond strength and the data were statistically analyzed using two-way analysis of variance and post-hoc Tukey test. Results PAD groups recorded the highest values while ozonated olive oil groups recorded the lowest values. Bond strength of Endosequence BC was significantly higher than MetaSeal (P ≤ 0.05). The bond strength in the coronal sections was higher than that in the middle and apical sections. Conclusion PDA final disinfection protocol performed similarly to NaOCl and does not negatively affect bond strength as ozonated olive oil. Endosequence BC was better than MetaSeal in terms of bond strength.

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