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 root fillings made with C-Point and BC sealer versus gutta-percha and AH Plus after the instrumentation of oval canals with the Self-Adjusting File versus WaveOne.
AIM To compare the push-out bond strength exhibited by root fillings performed with either C-Point and Endosequence ® BC sealer ™ ( BC Sealer ) or gutta-percha and AH Plus ® after the instrumentation of oval canals with either the Self-Adjusting File ( SAF ) System or WaveOne ( WO ) reciprocating file . METHODOLOGY Eighty extracted premolars were selected and divided r and omly into the following four groups ( n = 20 ) : group 1 , SAF instrumentation and filling using gutta-percha and AH Plus sealer ; group 2 , SAF instrumentation and C-Point and BC sealer filling ; group 3 , WO instrumentation and filling using gutta-percha and AH Plus sealer ; and group 4 , WO instrumentation and filling with C-Point and BC sealer . Sodium hypochlorite ( 5.25 % ) and EDTA ( 17 % ) were used as irrigants for all groups . After the sealer was set completely , the teeth were prepared for micro push-out assessment using 1.0-mm-thick root slices . Loading was performed with a universal testing machine at a speed of 0.5 mm min(-1 ) . Two-way anova and Student 's t-test for pairwise comparisons were used to compare groups . RESULTS All specimens filled with C-Point and BC sealer were associated with significantly higher push-out bond strength compared with gutta-percha and AH Plus sealer ( P < 0.001 ) . The bond strength was higher for the coronal and apical sample s of the C-Point/BC sealer/SAF group ( 6.6 ± 0.3 and 3.2 ± 0.3 MPa ) versus those of the gutta-percha/AH Plus/WO group ( 4.8 ± 0.3 and 1.8 ± 0.3 MPa ) , by 38 % and by 80 % in the coronal and apical parts , respectively ( P < 0.001 , P < 0.0001 ) . Adhesive bond failure was more common in the WaveOne-instrumented group in general and in the buccal and lingual recesses in this group in particular . CONCLUSIONS In oval canals , the instrument used and the root filling material significantly affected the push-out values of root fillings . The highest value was recorded in oval root canals instrumented with the SAF System and filled with C-Point and BC sealer , whereas the lowest strength was noted in oval canals instrumented with WaveOne and filled with gutta-percha and AH Plus sealer
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 ) .