Performance of self-etching adhesives on caries-affected primary dentin treated with glutaraldehyde or silver diamine fluoride

• Published in: Journal of the mechanical behavior of biomedical materials Vol. 150; p. 106293
• Main Authors: Wolowski, Marcelly Tupan Christoffoli, Grenier, Andressa Mioto Stabile, de Oliveira, Victória Alícia, Anselmi, Caroline, Gibin, Mariana Sversut, de Castro-Hoshino, Lidiane Vizioli, Sato, Francielle, Perez, Cristina, Scheffel, Régis Henke, Hebling, Josimeri, Baesso, Mauro Luciano, Scheffel, Debora Lopes Salles
• Format: Journal Article
• Language: English
• Published: Netherlands 01.02.2024
• Subjects: Adhesives - pharmacology; Composite Resins - chemistry; Dental Bonding; Dental Caries Susceptibility; Dentin; Dentin-Bonding Agents - chemistry; Dentin-Bonding Agents - pharmacology; Glutaral; Materials Testing; Resin Cements - chemistry; Tensile Strength; Dentin; Dental caries; Microtensile strength; Glutaraldehyde; Primary dentin; Raman spectral analysis; Caries-affected dentin; Adhesion; Dental adhesives
• ISSN: 1751-6161; 1878-0180; 1878-0180
• DOI: 10.1016/j.jmbbm.2023.106293

to evaluate the quality and stability of adhesive interfaces established by self-etching adhesives on caries-affected primary dentin (CAD) treated with glutaraldehyde (GA) or silver diamine fluoride (SDF). 42 primary molars were exposed to a microbiological caries-inducing protocol and divided into 6 groups according to the adhesive system (Clearfil SE - CL or FL Bond II - FL) and pretreatment (water, GA or SDF) applied on CAD. One tooth from each group was analyzed for surface modification using infrared spectroscopy. Crowns were restored with resin composite (n = 36) and cut into beams and slices. The beams were subjected to microtensile testing, Raman spectroscopy and SEM after 24 h and 6 months of storage. The slices were analyzed using Micro-Raman spectroscopy to determine the diffusion zone thickness (DZ) in each period. Data were analyzed by ANOVA and Tukey or Kruskal-Wallis and Dunn tests (α = 0.05%). SDF reduced the immediate bond strength for both adhesives. The control groups showed a decrease in BS after 6 months in artificial saliva. GA increased immediate DZ for FL, while SDF had the opposite effect on CL. GA decreased the DZ for FL at 6 months. There was a predominance of adhesive failures with areas of cohesive dentin fractures within control groups. Modifications caused by dentin surface treatments may directly affect the performance of adhesive systems and the quality and stability of adhesive restorations.