Effect of Dentin Irrigants on Push-Out Bond Strength in Resin Cementation Protocols for Fiber Posts in Endodontically Treated Teeth: An In Vitro Study

• Published in: Materials Vol. 17; no. 6; p. 1432
• Main Authors: García-Varela, Sandra, Ramos, João Carlos, Ginzo-Villamayor, María José, Castelo-Baz, Pablo, Méndez-Díaz, Ramón, Anache-D'Abate, Marcos Aníbal, Gancedo-Gancedo, Tania, Ruíz-Piñón, Manuel, Mareque-Bueno, Soledad, Martín-Biedma, Benjamín José
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 21.03.2024; MDPI
• Subjects: Acids; Adhesive bonding; Adhesive strength; Adhesives; Analysis; bond strength; Bonding strength; Cement; Cementation; Chlorhexidine; Collagen; dental adhesive; Dentin; Distilled water; Endodontics; Etching; Ethylenediaminetetraacetic acid; Ethylenediaminetetraacetic acids; fiber post; hybrid layer; push-out; Resins; Sodium hypochlorite; Teeth; Japan; Germany; Spain; United States > US; Switzerland; dental adhesive; hybrid layer; push-out; bond strength; fiber post; chlorhexidine; dentin; EDTA; sodium hypochlorite
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma17061432

The aim of this study is to analyze the effects of different endodontic irrigants and adhesive systems on the resin bond strength of fiber post cementation. In total, 144 single-rooted, unrestored human teeth were endodontically treated and randomly divided into 12 groups according to four endodontic irrigants (distilled water as control; EDTA 17%; NaOCl 5%; chlorhexidine digluconate 2%) and three different adhesive/resin cement systems (etch-and-rinse: orthophosphoric acid, Parabond A+B/Paracore ; self-etch: ParaBond Non-Rinse Conditioner, Parabond A+B/Paracore ; Universal: Clearfil Universal Bond/Clearfil DC Core Plus). Forty-eight hours after post cementation, ten teeth from each group were cross-sectioned into three discs (cervical, middle and apical regions). Thirty specimens of each group ( = 30) were submitted to a push-out test at a crosshead speed of 1 mm/min. The remaining two teeth of each group were sectioned in the same manner, and the resin-dentin interface was evaluated using scanning electron microscopy (SEM). The results were statistically analyzed with the ANOVA test and Tukey's test ( < 0,01). The adhesive protocols and post space region showed no significant effect on bond strength ( > 0.01). The combination of NaOCl 5% and ClearfilTM Universal Bond reduced the adhesive strength ( < 0.01). The NaOCl 5%, in relation to other irrigants, significantly decreased the push-out bond strength.