title: Bonding effectiveness of two adhesive luting cements to glass fiber posts: pull-out evaluation of three different post surface conditioning methods.
abstract: The purpose of this study was to evaluate the bond strength at the post/resin-cement interface with 3 different surface treatments of glass fiber posts and with 2 different luting resin cements. Sixty glass fiber posts (RelyX Fiber Post) were randomly divided into 3 groups (n = 20) and were luted with a dual-polymerizing self-adhesive universal resin cement (RelyX Unicem) and with a dual-polymerizing resin cement (RelyX ARC). This was carried out in association with a dual-polymerizing adhesive (Scotchbond Multi-Purpose Plus) in simulated plexiglass root canals after receiving three different pretreatment procedures. A pull-out test was performed on each sample to measure bond strengths. Data were analyzed with two-way ANOVA. Two samples from each group were processed for SEM observations in order to investigate the morphologic aspect of the post/cement interface. Both resin cements demonstrated significant different bond strength values (P < 0.0001). The surface treatment result was also statistically significant (P = 0.0465). SEM examination showed a modification of the post surface after pretreatment with methyl methacrylate. The dual-polymerizing self-adhesive universal resin cement achieved higher MPa bond strength values. The use of methyl methacrylate as a surface treatment of glass fiber posts provided a significant increase in bond strengths between the posts and both luting materials.
authors.affiliation: Department of Restorative Dentistry, Institute of Clinical Dentistry, University of Padova, Via Venezia, 90, 35100 Padova, Italy.
authors.forename: Lorenzo
authors.identifier: 0000-0002-5433-8512
authors.initials: L
authors.lastname: Graiff
authors.affiliation: Private Practice, Via Vivaldi 13, Farra di Soligo, 31010 Treviso, Italy.
authors.forename: Laura
authors.identifier: 0000-0002-9337-9990
authors.initials: L
authors.lastname: Rasera
authors.affiliation: Department of Restorative Dentistry, Institute of Clinical Dentistry, University of Padova, Via Venezia, 90, 35100 Padova, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Calabrese
authors.affiliation: Department of Clinical Odontostomatology, Institute of Clinical Dentistry, University of Padova, Via Venezia, 90, 35100 Padova, Italy.
authors.forename: Paolo
authors.identifier: 0000-0002-1357-1465
authors.initials: P
authors.lastname: Vigolo