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 .
Gutta percha verses resilon: an in vitro comparison of fracture resistance in endodontically treated teeth.
OBJECTIVE The aim of this study was to evaluate and compare the fracture resistance of endodontically treated teeth filled with gutta percha and Resilon  using lateral and vertical condensation methods . MATERIAL S AND METHODS A total of 75 freshly extracted single-rooted teeth were selected . All sample s were instrumented with profile 4 % Ni-Ti rotary instruments . Sample s were r and omly divided into five groups of 15 sample s each : Group 1 was obturated using lateral condensation with gutta percha and AH -26 sealer . Group 2 was obturated using vertical condensation with gutta-percha and AH-26 . Group 3 was obturated with Resilon and epiphany using lateral condensation technique . Group 4 was obturated with Resilon and epiphany using vertical condensation method . Group 5 received no filling . Restored teeth were subjected to compressive loading in a universal testing machine . RESULTS One-way ANOVA test showed significant difference among the groups ( P < 0.05 ) . The mean and SD values for the groups are as follows : Group 1 - ( 773.3 ± 148.1 ) , Group 2 - ( 769.9 ± 170.5 ) , Group 3 - ( 928.1 ± 135.4 ) , Group 4 - ( 902.6 ± 120.8 ) , and Group 5 - ( 766.0 ± 152.0 ) . It was seen that sample s of Group 3 showed the highest fracture resistance followed by Group 4 , Group 1 , and Group 2 . Group 5 showed the least fracture resistance . CONCLUSION Resilon-epiphany obturated roots using lateral condensation method showed higher fracture resistance  compared with gutta percha-AH 26 groups on vertical loading
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 .