Quintessence Int 43 (2012), No. 7 15. June 2012
Quintessence Int 43 (2012), No. 7 (15.06.2012)
Page 615-623, PubMed:22670257
Fiber post adhesion to radicular dentin: The use of acid etching prior to a one-step self-etching adhesive
Scotti, Nicola / Rota, Riccardo / Scansetti, Marco / Migliaretti, Giuseppe / Pasqualini, Damiano / Berutti, Elio
The aim of this study was to evaluate the bond strength of fiber posts luted with a one-step self-etching adhesive with the push-out test after phosphoric acid conditioning of the root dentin. Thirty-six single-rooted teeth were endodontically treated. Teeth were sectioned perpendicularly to the cementoenamel junction, and a 10-mm post space was prepared with a calibrated bur. Specimens were then divided into three groups according to the adhesive protocol: A, total-etch three steps; B, self-etch one step; and C, 32% phosphoric acid conditioning and self-etch one step. Fiber posts were luted with self-curing resinbased cement. Teeth were cut in 1-mm slices and pushed until failure with an Instron machine. Results were statistically analyzed with the ANOVA and Bonferroni tests (P < .05). Two additional specimens from each group were examined under the scanning electron microscope (SEM). The 32% phosphoric acid significantly influenced the push-out bond strength of fiber posts luted with self-etch adhesives (P < .05). SEM analysis showed a continuous hybrid layer with resin tags and lateral branches in groups A and C, while group B showed smear layer dissolution with poor infiltration of the tubules.
Keywords: bond strength, fiber post, phosphoric acid, push-out, self-etch