Role of chlorhexidine on long-term bond strength of self-adhesive composite cements to intraradicular dentin

Valeria Angeloni, Annalisa Mazzoni, Giulio Marchesi, Milena Cadenaro, Allegra Comba, Tatjana Maravić, Nicola Scotti, David Henry Pashley, Franklin Chi Meng Tay, Lorenzo Breschi

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)341-348
Number of pages8
JournalJournal of Adhesive Dentistry
Volume19
Issue number4
DOIs
StatePublished - Jan 1 2017

Keywords

  • Chlorhexidine
  • Dentin bonding agents
  • Fiber posts
  • Nanoleakage analysis
  • Push out
  • Self-adhesive cements

ASJC Scopus subject areas

  • Orthodontics
  • Oral Surgery
  • Periodontics

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    Angeloni, V., Mazzoni, A., Marchesi, G., Cadenaro, M., Comba, A., Maravić, T., Scotti, N., Pashley, D. H., Tay, F. C. M., & Breschi, L. (2017). Role of chlorhexidine on long-term bond strength of self-adhesive composite cements to intraradicular dentin. Journal of Adhesive Dentistry, 19(4), 341-348. https://doi.org/10.3290/j.jad.a38896