Although the majority of the studies reported that the use of root canal sealers increased the fracture resistance of endodontically treated teeth , conflicting evidence was found for the reinforcing effect of resin , glass ionomer , and calcium silicate-based sealers while there was moderate evidence for zinc oxide eugenol-based sealers in favor of no reinforcing effect .
Conclusion On the basis of available evidence , the use of root canal sealer increases the fracture resistance of endodontically treated teeth .
Regarding the comparisons among the sealers , no conclusions could be drawn for the superiority of one sealer type to another .
Objective The purpose of this study was to systematic ally review and critically analyze the published data of in vitro studies testing the effect of root canal sealers on the fracture resistance of endodontically treated teeth .
Final Irrigation Regimens Affect Fracture Resistance Values of Root-filled Teeth.
INTRODUCTION The purpose of this study was to compare the effect of different final irrigation solutions on fracture resistance values ( FRVs ) of endodontically treated teeth . METHODS Eighty extracted decoronated human incisors were used . Ten r and omly selected roots were used as the negative control group . The remaining roots were prepared by the ProTaper system ( Dentsply Maillefer , Ballaigues , Switzerl and ) up to F2 . Ten prepared roots were selected as the positive control . The other prepared roots were divided into 6 ( n = 10 ) groups according to the final irrigation solution used : 5 mL saline , 17 % EDTA , EDTA with a surfactant ( REDTA ) , chlorhexidine , QMix ( Dentsply Tulsa Dental Specialties , Tulsa , OK ) , and BioPure MTAD ( Dentsply Tulsa Dental Specialties ) . In all groups , the final irrigation was performed for 1 minute except for the BioPure MTAD group ; in this group , it was applied for 5 minutes according to the manufacturer 's instructions . The specimens were filled with a single gutta-percha cone and AH 26 sealer ( Dentsply , De Trey , Konstanz , Germany ) . After being stored under 37 ° C and 100 % humidity for a week , the specimens were loaded in a vertical direction at 1 mm/min speed until they were vertically fractured . The results were analyzed by the Kruskal-Wallis and Siegel Castellan tests . RESULTS The negative control group showed the highest FRV . There were statistically significant differences between the negative and positive control groups ( P < .05 ) . Specimens irrigated with REDTA and QMix showed a higher FRV compared with the positive control group ( P < .05 ) . Specimens exposed to chlorhexidine and BioPure MTAD showed a lower FRV compared with the negative control group ( P < .05 ) . CONCLUSIONS Root canal preparation weakens the tooth . The final irrigation regimen has an impact on the FRV . A short time exposure to irrigation solutions ( REDTA and QMix ) that include surfactants probably contributed to the higher FRV , instead of a long time exposure as done with BioPure MTAD
Although the majority of the studies reported that the use of root canal sealers increased the fracture resistance of endodontically treated teeth , conflicting evidence was found for the reinforcing effect of resin , glass ionomer , and calcium silicate-based sealers while there was moderate evidence for zinc oxide eugenol-based sealers in favor of no reinforcing effect .
Conclusion On the basis of available evidence , the use of root canal sealer increases the fracture resistance of endodontically treated teeth .
Regarding the comparisons among the sealers , no conclusions could be drawn for the superiority of one sealer type to another .
Objective The purpose of this study was to systematic ally review and critically analyze the published data of in vitro studies testing the effect of root canal sealers on the fracture resistance of endodontically treated teeth .