Effect of different bonding techniques on the bond strength of two different fiber posts

Abstract

Aim: The aim of this study was to investigate the effect of three different bonding techniques on the bond strength of two different fiber posts to root dentin with push out test. Materials and Methods: A total of 30 extracted teeth were sectioned at the cement-enamel junction using a diamond disc under water-coolant to obtain 18 mm root length. All roots were treated endodontically and filled with sealer and Gutta-percha points. The roots were randomly divided into two groups according to chosen post systems (Rebilda DC [VOCO, Cuxhaven, Germany] or UniCore [Ultradent, South Jordan, UT]). Following preparation specimens were randomly divided into three subgroups of 3 teeth each. Luting of the posts were completed with Rebilda DC (self-etch); BisCem (self-adhesive, Bisco, Schaumburg, IL) Duo-Link (etch and rinse Bisco). Specimens were transversally sectioned into 2 ± 0.05 mm thick discs and push-out test was performed. The data was analyzed statistically by using three-way ANOVA and Tukey tests. Results: The bond strengths between fiber posts and root dentin were affected by type of resin cement and post ( P < 0.05). Push out bond strengths of Rebilda groups was lower than UniCore groups ( P < 0.05). Push out bond strength of DuoLink and Rebilda DC cement groups were higher than BisCem groups. There were no statistically differences between root region. Conclusion: It can be concluded that, bond strength between fiber post and root dentin affected by the using of different post and cement types. Self-adhesion techniques were showed lower bond strength than both self-etch and etch and rinse techniques