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 ) .
Push-Out Bond Strength and Surface Microhardness of Calcium Silicate-Based Biomaterials: An in vitro Study
Objective : This was an in vitro evaluation of push-out bond strength and surface microhardness of calcium silicate-based bio material s in coronal and apical root dentin . Material s and Methods : Ninety sections ( 2 mm thick ) of coronal and apical root dentin were obtained from roots of 60 extracted teeth ; the canals were enlarged to a st and ardized cavity diameter of 1.3 mm . Sections were r and omly divided into 6 groups ( n = 15 per group ) , and cavities were filled with Biodentine ™ , BioAggregate , or ProRoot mineral trioxide aggregate ( MTA ) , according to the manufacturers ' instructions . Push-out bond strength values were measured using a universal testing machine under a compressive load at a speed of 1 mm/min . Sample s were analyzed under a light microscope to determine the nature of bond failure . Ten sample s ( 2 mm thick ) were prepared for all the material s , and Vickers microhardness was determined using a digital hardness tester . Data were analyzed using one-way analysis of variance and Tukey-Kramer multiple comparison tests at a significance level of p < 0.05 . Results : Biodentine ( 42.02 ; 39.35 MPa ) and ProRoot MTA ( 21.86 ; 34.13 MPa ) showed significantly higher bond strengths than BioAggregate ( 6.63 ; 10.09 MPa ) in coronal and apical root dentin , respectively ( p < 0.05 ) . Biodentine also differed significantly from ProRoot MTA in coronal dentin . Bond failure was predominantly adhesive in Biodentine and ProRoot MTA , while BioAggregate showed predominantly mixed failure . ProRoot MTA ( 158.52 HV ) showed significantly higher microhardness and BioAggregate ( 68.79 HV ) showed the lowest hardness . Conclusion : Biodentine and ProRoot MTA showed higher bond strength and microhardness compared to BioAggregate
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 ) .