Neelakantan, P.Mohanraj, R.Chua, E.Belli, S.2020-03-262020-03-2620150169-42431568-5616https://dx.doi.org/10.1080/01694243.2014.989652https://hdl.handle.net/20.500.12395/32216The aim of this study was to evaluate the influence of irrigation protocols on the bond strength of a glass fiber post bonded to dentin using two resin cements. In 200 root-filled teeth, post space was prepared and divided into five groups (n = 40) based on the irrigation protocol: group 1 (3% sodium hypochlorite), group 2 (3% sodium hypochlorite - 17% Ethylene diamine tetraacetic acid), group 3 (a mixture of sodium hypochlorite and etidronic acid), group 4 (sodium hypochlorite - QMix), and group 5 (distilled water). Samples were subdivided into two subgroups (n = 10) and fiber posts were cemented using subgroup A (Self-adhesive dual-cure resin cement; SEA) or B (dual-cure resin cement following an etch-and-rinse protocol, ER). Push-out bond strength was performed after 24h and four months (n = 10) and failure modes were categorized. Statistical analysis of data was carried out by appropriate analyses (p<0.05). The irrigation protocol and the resin cement had a significant impact on push-out bond strength. Subgroup A group showed lower bond strength than B at both time periods when 3% NaOCl-17% EDTA and 1:1 mixture of 6% NaOCl+18%EA protocols were used. Three percent NaOCl used in combination with 17% EDTA or QMix significantly decreased the push-out bond strength of ER at the end of four months (p<0.05). In conclusion, dual-cure resin cements bonded with etch-and-rinse protocol showed highest bond strength when a mixture of NaOCl and etidronic acid was used as root canal irrigant. These values were differentially influenced by time.en10.1080/01694243.2014.989652info:eu-repo/semantics/closedAccessirrigationfiber postbond strengthresin cementproteolyticArticle294337346Q2WOS:000346349700007Q3