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Push‐out stress for fibre posts luted using different adhesive strategies
Author(s) -
Mazzoni Annalisa,
Marchesi Giulio,
Cadenaro Milena,
Mazzotti Giovanni,
Di Lenarda Roberto,
Ferrari Marco,
Breschi Lorenzo
Publication year - 2009
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.2009.00656.x
Subject(s) - materials science , adhesive , bond strength , cement , luting agent , composite material , dentistry , medicine , layer (electronics)
The influence of thermocycling on the bond strength of fibre posts cemented with different luting approaches was investigated. A total of 84 human incisors were selected for the study. Sixty teeth were assigned to one of the following adhesive/cement combinations for push‐out bond‐strength evaluation: group 1, XP Bond/CoreXFlow + DT Light‐Post; group 2, Panavia F 2.0 + Tech 21; or group 3, RelyX Unicem + RelyX. Bonded specimens were cut into 1‐mm‐thick slabs and either thermocycled (40,000 cycles) or stored in artificial saliva (control specimens) before push‐out bond‐strength testing. Additional specimens were processed for quantitative interfacial nanoleakage analysis. Thermocycling decreased the bond strength in specimens of groups 2 and 3, but did not affect the specimens from group 1. No difference was observed among luting approaches in control specimens. Thermocycling resulted in increased silver nitrate deposition (i.e. interfacial nanoleakage) in all groups. Within the limitations of the study, the use of an etch‐and‐rinse adhesive in combination with a dual‐cure cement to lute fiber posts is the most stable luting procedure if compared with a self‐etch resin‐based cement or a self‐adhesive cement, as assayed by thermocycling of the bonded specimens.