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 ) .
Time-dependent effectiveness of the intracanal medicaments used for pulp revascularization on the dislocation resistance of MTA
Background The aim of the present study was to evaluate the time-dependent effectiveness of the intracanal medicaments used in pulp revascularization on the dislocation resistance of mineral trioxide aggregate ( MTA ) . Methods One hundred ninety-two extracted human maxillary incisor teeth were sectioned apically 12 mm below and coronally 2 mm above the cemento-enamel junction . Roots were enlarged to size 40 ( Protaper F4 ) . Next , Peeso reamers from # 1 to # 5 were used sequentially . Sodium hypochlorite ( 2.5 % ) , EDTA ( 17 % ) , and distilled water were used in final irrigation . The specimens were r and omly divided into four groups ( n = 48 ) : Group 1 , in which triple antibiotic paste ( TAP ) ( ciprofloxacin + metronidazole + minocycline ) was prepared and delivered into the canals using a lentulo spiral ; Group 2 , in which double antibiotic paste ( DAP ) ( ciprofloxacin + metronidazole ) was placed into the canals ; Group 3 , in which calcium hydroxide paste ( CH ) ( calcium hydroxide + distilled water ) was introduced into the roots ; and Group 4 ( control ) , in which no medicament was applied into the root canals . Then , the sample s were kept in saline solution for 2 , 4 , and 12 weeks , after which time 16 roots were selected r and omly from each group , representing the sample s of each time point . After removal of the medicaments , MTA was placed into the coronal third of the roots , and the sample s were incubated for 7 days . A push-out test was used to measure the dislocation resistance ( DR ) of MTA . The data were analyzed using a two-way ANOVA followed by Tukey ’s pairwise comparisons ( p = 0.05 ) . Results The time factor displayed a significant effect on the DR of MTA ( p < 0.05 ) . All medicaments result ed in significantly smaller DR values after 12 weeks compared to after 1 week ( p < 0.05 ) . A significant unfavorable effect of TAP and DAP was observed as early as 2 weeks after the application , while 2 and 4 weeks after the application of CH there was no effect on the DR of MTA . No significant differences were found between the time points in the control group ( p > 0.05 ) . Conclusion The type and the intracanal duration of medicaments used for pulp revascularization should be chosen carefully to provide maximum antimicrobial effect while creating a favorable environment both for stem cell attachment and MTA adhesion
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 ) .