Odontology, 2025 (SCI-Expanded, Scopus)
This study evaluated the effects of three chelating agents—glycolic acid (GA), ethylenediaminetetraacetic acid (EDTA), and etidronic acid (HEDP)—combined with different irrigation activation techniques on the pushout bond strength of Biodentine to root dentin after calcium hydroxide removal. A total of 120 extracted single-rooted mandibular premolars were randomly assigned to nine experimental and one control group (n = 12). Following Ca(OH)2 dressing and incubation, canals were irrigated with GA, EDTA, or HEDP, each activated using passive ultrasonic irrigation (PUI), XP-Endo Finisher (XPF), or conventional needle irrigation (CNI). Biodentine was placed into 2 mm-thick root slices, and pushout bond strength was measured using a universal testing machine. Statistical analysis was performed using one-way ANOVA for group comparisons, and two-way ANOVA was used to evaluate factor effects (α = 0.05). Overall, GA produced higher bond strength than EDTA (p = 0.027). The difference between GA and HEDP was not significant under PUI activation; however, GA yielded significantly higher bond strength than HEDP when activated with CNI or XPF. Using 10% GA with PUI enhanced Biodentine–dentin adhesion, suggesting its potential as a biocompatible and effective alternative to conventional chelators in regenerative endodontic treatments, improving coronal sealing and long-term stability.