PMID- 28849803 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Adhes Dent JT - The Journal of Adhesive Dentistry IS - 1757-9988 (Electronic) IP - 4 VI - 19 PST - ppublish DP - 2017 PG - 341-348 LA - en TI - Role of Chlorhexidine on Long-term Bond Strength of Self-adhesive Composite Cements to Intraradicular Dentin LID - 10.3290/j.jad.a38896 [doi] FAU - Angeloni, Valeria AU - Angeloni V FAU - Mazzoni, Annalisa AU - Mazzoni A FAU - Marchesi, Giulio AU - Marchesi G FAU - Cadenaro, Milena AU - Cadenaro M FAU - Comba, Allegra AU - Comba A FAU - Maravi, Tatjana AU - Maravi T FAU - Scotti, Nicola AU - Scotti N FAU - Pashley, David H. AU - Pashley D FAU - Tay, Franklin R. AU - Tay F FAU - Breschi, Lorenzo AU - Breschi L CN - OT - chlorhexidine OT - dentin bonding agents OT - fiber posts OT - nanoleakage analysis OT - push out OT - self-adhesive cements AB - Purpose: To examine the effect of CHX pre-treatment on long-term bond strength of fiber posts luted with self-adhesive resin cements. Materials and Methods: Seventy-two single-rooted teeth were selected for root canal treatment and post space preparation. The tested self-adhesive cement/post combinations were (N = 36): 1. RelyX Fiber-Posts luted with RelyX Unicem; 2. Rebilda Posts luted with Bifix SE Cement. For both self-adhesive cements, half of the specimens (experimental groups) were luted after the application of a solution of 2% CHX, while no CHX application was performed for the remaining specimens (control groups). Luted specimens were cut and used for push-out bond strength evaluation immediately, and after storage in artificial saliva for 6 months or 1 year. Additional specimens were processed for quantitative interfacial nanoleakage analysis. Results: ANOVA showed that the variable times of storage had a significant influence on the results (p < 0.05), while no influence of the luting procedure (cements with or without CHX) on the final outcome (p > 0.05) was found. Tukey's pairwise post-hoc test showed that the radicular bond strength decreased with time of storage. In particular, a significant difference was found between T0 and T1y, but not between T0 and T6m. In contrast, in terms of pretreatment, no significant reduction in push-out bond strength was observed, irrespective of the aging time. Conclusion: CHX pretreatment did not prevent bond strength degradation of fiber posts luted with self-adhesive cements. AID - 843367