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 of a nano-modified mineral trioxide aggregate.
INTRODUCTION To analyze the push-out bond strength of Angelus WMTA ( Angelus Dental Products ) , a nano-modification of WMTA ( Kamal Asgar Research Center ) and Bioaggregate ( Innovative Bioceramix ) . METHODS Sixty 2-mm-thick root sections were prepared from 60 single-rooted human teeth . The dentin disks were r and omly divided into three groups ( n = 20 ) and filled with Angelus WMTA , Nano-WMTA , or Bioaggregate , respectively . Push-out bond strength values of the specimens were measured by a universal testing machine and examined under scanning electron microscope at × 40 magnification to determine the nature of the bond failure . The data were analyzed with a Kruskal-Wallis test . RESULTS The greatest mean for push-out bond strength ( 138.48 ± 11.43 MPa ) was observed for the nano-modification of WMTA . The values decreased to 110.73 ± 11.19 and 25.64 ± 5.27 MPa for Angelus WMTA and Bioaggregate , respectively . There were significant differences between the groups ( P < 0.001 ) . Inspection of the sample s revealed the bond failure to be predominantly adhesive type except for the nano-modification group , as some sample s also exhibited cohesive failures . CONCLUSIONS It is concluded that the force needed for the displacement of the nano-modification of WMTA ( NWMTA ) was significantly higher than for Angelus WMTA and 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 ) .