HIGHLIGHTSPOBT in endodontic research predicts the clinical behavior of endodontic material s .
Introduction : There is limited literature on the impact of testing variables on the push‐out bond test ( POBT ) .
This review identified design s of the POBT used in the endodontic literature and aim ed to determine which experimental variables may influence the push‐out bond strength ( POBS ) .
Effect of Smear Clear and Some Other Commonly Used Irrigants on dislodgement resistance of Mineral Trioxide Aggregate to Root Dentin
Background This study aim ed to assess the push-out bond strength of mineral trioxide aggregate ( MTA ) to root canal dentin after irrigation with Smear Clear in comparison with 2.5 % sodium hypochlorite ( NaOCl ) , 2 % chlorhexidine ( CHX ) and saline as commonly used root canal irrigants . Material and Methods The coronal and mid-root areas of maxillary anterior teeth were horizontally sectioned into one-millimeter thick slices . The root canal lumen of dentinal slices was dilated using a diamond bur with 1.3 mm diameter . After the application of MTA , the sample s were incubated in 100 % humidity for 10 minutes and were then r and omly divided into four groups ( n=20 ) and immersed in Smear Clear , 2.5 % NaOCl , 2 % CHX and saline for 30 minutes . No irrigant was used for the control group ( n=20 ) . A wet cotton pellet was placed on the sample s and after 48 hours of incubation , push-out bond strength was measured using a universal testing machine . The sample s were evaluated under a stereomicroscope to determine the mode of failure . One-way ANOVA was used to assess statistical differences among the groups . Results The control group showed the highest bond strength with significant differences with other groups ( P<0.05 ) . Among the experimental groups , the saline group had no significant difference with CHX ( P=0.09 ) but it had significant differences with Smear Clear and NaOCl groups ( P<0.05 ) . No significant difference in bond strength to MTA was noted after irrigation with Smear Clear , CHX and NaOCl ( P>0.05 ) . Other pairwise comparisons showed no significant difference ( P>0.05 ) . Conclusions Irrigation with Smear Clear , CHX and NaOCl did not cause a significant change in bond strength of MTA to dentin . Key words : Root Canal Irrigants , push-out , Mineral Trioxide Aggregate , dentin
HIGHLIGHTSPOBT in endodontic research predicts the clinical behavior of endodontic material s .
Introduction : There is limited literature on the impact of testing variables on the push‐out bond test ( POBT ) .
This review identified design s of the POBT used in the endodontic literature and aim ed to determine which experimental variables may influence the push‐out bond strength ( POBS ) .