effect of using calcium-silicate and silicone based root canal sealers in bulk or with main core material on bond strength

Background. the purpose of this study was to assess the push-out bond strength of calciumsilicate and silicone based root canal sealers in bulk and with main cone. methods. roots (n = 48) randomly divided into 4 groups (n = 12) according to the obturation protocol; (1) iroot sp in bulk; (2) iroot sp with gutta-percha; (3) guttaflow bioseal in bulk; (4) guttaflow bioseal with gutta-percha. six horizontal sections were obtained from each root (n = 72). effect of sealers on bond strength was statistically significant (p < 0.05). results. highest mean value was obtained in iroot-bulk group and lowest in guttaflow bioseal-gp group. both iroot sp groups had significantly higher bond strength values than both guttaflow bioseal groups (p < 0.05). there was no significant difference between iroot- gp and iroot-bulk groups (p = 0.603) also guttaflow bioseal-gp and guttaflow bioseal-bulk groups (p = 0.684). conclusion. based on findings, using calcium silicate-based sealer in bulk can be also suitable in clinical practice.