Restoration of endodontically treated teeth with major hard tissue loss - bond strength of conventionally and adhesively luted fiber-reinforced composite posts

Aim To evaluate the influence of the luting system on the pull‐out bond strength of conventionally and adhesively luted fiber‐reinforced composite posts (FRCPs). Material and methods One hundred extracted bovine teeth (Di 3) were endodontically treated and randomly assigned to nine test groups and one control group (n = 10) according to luting system. After preparing the post cavities (8 mm), the custom‐made FRCPs were inserted using conventional glass‐ionomer cement (Ketac Cem), resin‐reinforced glass‐ionomer cement (Meron Plus and Fuji Plus), self‐adhesive resin cement (RelyX Unicem and BisCem), self‐conditioning adhesive and resin cement [Multilink Primer + Multilink and AdheSE + DC Activator + MultiCore Flow, or etch‐and‐rinse adhesive and resin cement (SealBond Ultima + CoreCem, and LuxaBond + LuxaCore Z). As a control, custom‐made titanium posts were inserted with Ketac Cem. After water storage (37°C, 24 h, dark), the pull‐out test was performed, followed by failure mode evaluation. The data were statistically analyzed (α = 0.05) using analysis of variance and the Dunnett T3 post hoc test. Results Luting system type and identity significantly influenced bond strength (P