Effect of post-space irrigation with acid solutions on bond strength and dentin penetrability using a self-adhesive cementation system

Made available in DSpace on 2022-04-29T08:29:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-06-01 Background: The aim of this study was to evaluate the effects of surface treatments with 1% peracetic acid (PA), solution containing 17% EDTA (SmearClear, Kerr Endodontics), solution containing a combination of 17% EDTA with 2% chlorhexidine (QMix, Dentsply Sirona) on the post-space root dentin compared to 2.5% sodium hypochlorite (NaOCl) on bond strength and resin tags length in dentin. Material and Methods: Forty human-canine roots were endodontically treated and the post space was prepared. The specimens were randomised into four groups (n = 10): control - irrigation with 2.5% NaOCl solution, PA - irrigation with 1% PA, SmearClear - irrigation with SmearClear solution, and QMix - irrigation with QMix solution. The fibre posts were cemented using a self-adhesive resin system (Relyx U200, 3M ESPE). After six months, the specimens were cross-sectioned and subjected to push-out and confocal laser microscopy tests. One-way ANOVA and Tukey's tests were used to analyse the data (a= 0.05). Results: PA and QMix presented the highest bond strength values compared to the other groups (p < 0.05). There was no significant difference between the resin tags length in dentin by the groups (p = 0.75). Conclusions: Irrigation of the post space with 1% PA and QMix showed a positive clinical impact on the adhesion between the fiber post and root dentin. However, these materials had no influence on resin tags length in dentin by self-adhesive resin cement. Department of Restorative Dentistry Araraquara School of Dentistry São Paulo State University (UNESP) School of Dentistry Federal University of Para (UFPA) Department of Restorative Dentistry Bauru School of Dentistry University of Sao Paulo (USP) Department of Restorative Dentistry Araraquara School of Dentistry São Paulo State University (UNESP)