Comparative Evaluation of the Effect of Sodium hypochlorite and Chlorhexidine on the Pushout Bond Strength of MTA Putty and Biodentine: An in Vitro Study

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This in vitro investigation assessed the impact of 2.5% sodium hypochlorite and 2% chlorhexidine on the interfacial strength of Putty MTA (Safeendo) , Biodentine (Septodont) in root perforation repair. Twenty human dentin discs, sectioned to 2 mm thickness with 1.5 mm perforations, were contaminated with blood and restored with either MTA Putty or Biodentine and were allowed to set for 4–5 hours. Samples were allocated to four groups (n=5 each): Group A (MTA Putty + NaOCl), Group B (MTA Putty + CHX), Group C (Biodentine + NaOCl), and Group D (Biodentine + CHX). Each received 2 mL of the designated irrigant, and debond strength was tested with the help of universal tester. Group D showed the highest bond strength (23.4 ± 0.95 MPa), followed by Group C (20.78 ± 1.27 MPa), Group A (20.1 ± 0.75MPa), and Group B (18.5 ± 0.7 MPa),respectively with significant differences across groups (p < 0.05). Biodentine outperformed MTA Putty, and CHX enhanced bond strength in Biodentine and NaOCl in MTA Putty. These results concluded that Biodentine with CHX shows highest debond strength

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