Influence of epigallocatechin-3-gallate on bonding stability of a universal adhesive to bleached dentin
International Journal of Adhesion and Adhesives, cilt.151, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 151
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.ijadhadh.2026.104405
- Dergi Adı: International Journal of Adhesion and Adhesives
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC
- Anahtar Kelimeler: Bleaching, Dentin bond strength, Dimethyl sulfoxide, Epigallocatechin-3-gallate
- Recep Tayyip Erdoğan Üniversitesi Adresli: Evet
Özet
This study aimed to assess the influence of epigallocatechin-3-gallate (EGCG) on bond strength to bleached dentin in comparison with sodium ascorbate (SA). Dentin surfaces were prepared from human molars and bleached for 45 min. Unbleached specimens served as the positive control (PC). Antioxidant agents (SA and EGCG) were dissolved in distilled water (DW) or dimethyl sulfoxide (DMSO (50%)) and applied for 10 min to dentin surfaces immediately after bleaching. The bleached specimens were allocated into 7 groups (n = 40): (a) negative control (immediate bonding), (b) delayed bonding (after 14 days), (c) SA/DW, (d) 1%EGCG/DW, (e) SA/DMSO, (f) 1%EGCG/DMSO, and (g) 0.5%EGCG/DMSO. An adhesive agent was applied in self-etch (SE) or etch-and-rinse (ER) modes. Resin composite blocks were fabricated and subjected to shear bond strength (SBS) testing after 24-h or 6-month aging in distilled water. The degree of conversion (DC) and nanoleakage (NL) were further evaluated. Data were analyzed using multifactorial ANOVA, followed by Tukey post-hoc tests (α = 0.05). In SE mode, antioxidant application did not reverse SBS at 24-h. After 6-month, 1% EGCG provided comparable SBS to the PC group, whereas SA did not. In ER mode, both EGCG and SA significantly increased SBS, yielding values similar to those of the PC group. Aging did not statistically affect SBS (p = 0.254) but significantly increased NL for all groups (p < 0.001). After 6-month, greater silver nitrate deposition was detected in the negative control group. The use of DMSO did not statistically influence SBS, DC, or NL.