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Year : 2016  |  Volume : 28  |  Issue : 1  |  Page : 42-45

An in vitro comparison of push-out bond strength of biodentine and mineral trioxide aggregate in the presence of sodium hypochlorite and chlorhexidine gluconate

Department of Conservative Dentistry and Endodontics, Terna Dental College, Navi Mumbai, Mumbai, Maharashtra, India

Correspondence Address:
Shishir Singh
Department of Conservative Dentistry and Endodontics, Terna Dental College, Sector 22, Nerul, Navi Mumbai - 400 706, Mumbai, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0970-7212.184339

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Aim: The aim of this in vitro study was to compare the push-out bond strength of Biodentine (Septodont, Saint Maur des Fosses, France) and mineral trioxide aggregate (MTA) (Angelus, Londrina, PR, Brazil) when treated with 3% sodium hypochlorite (NaOCl) and 2% chlorhexidine gluconate (CHX). Materials and Methods: Forty-six single canal premolars were selected for this study, and the canal spaces were prepared with #5 Gates glidden drill (1.3 mm diameter). The dentin of these teeth was horizontally sectioned into 1-mm-thick slices at the mid-root level. The samples were divided into two groups (n = 20). Biodentine and MTA were placed into the canal space of dentin slices. The samples were wrapped in wet gauze for 10 min and divided into two subgroups (n = 10) to be immersed into 3% NaOCl and 2% CHX for 30 min. No irrigation was performed in the controls (n = 3). After incubation for 48 h, the dislodgement resistance of the samples was measured using a universal testing machine. The samples were examined under a stereomicroscope to determine the nature of the bond failures. Results: Biodentine showed significantly higher push-out bond strength than MTA (P < 0.05) in the presence of both NaOCl and CHX. Within the MTA group, CHX further reduced the push-out bond strength when compared with NaOCl. Conclusion: Push-out bond strength is the force needed for the displacement of the dental material tested. The various irrigants used during the root canal therapy may increase or decrease the push-out bond strength of a material.

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