Effect of adhesive system type and root region on the push-out bond strength of glass-fibre posts to radicular dentine

Onay EO, Korkmaz Y, Kiremitci A. Effect of adhesive system type and root region on the push‐out bond strength of glass–fibre posts to radicular dentine. International Endodontic Journal, 43, 76–85, 2010. Aim To compare interfacial strength in different thirds of the root canal amongst glass–fibre posts luted with four different adhesive luting agents. Methodology A total of 44 extracted human single‐rooted teeth were randomly divided in four groups and restored using glass–fibre posts and the following luting agents: All Bond SE/Duo‐Link (ABSE), All Bond 3/Duo‐Link (AB3), BisCem (BC), Clearfil ED primer II/Clearfil Esthetic Cement (CLF). One week after luting, the samples were thermocycled in water, and then embedded in acrylic resin. Three sections (cervical, middle and apical) of 2 mm thickness were prepared from each specimen, and the post in each section was subjected to a push‐out test. One additional specimen for each group was prepared for scanning electron microscopy analysis and the bonding effectiveness to dentine was assessed. The data were analysed using the Kolmogorov–Smirnov test, two‐way anova, one‐way anova, and the Scheffe test (P 0.05), but both were significantly higher than the means for AB3 and CLF (P 0.05) from each other. There were significant differences in bond strength amongst root thirds, with a reduction in values from the cervical to apical third (P