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

Marcelly Tupan Christoffoli Wolowski, Andressa Mioto Stabile Grenier, Victória Alícia de Oliveira, Caroline Anselmi, Mariana Sversut Gibin, Lidiane Vizioli de Castro-Hoshino, Francielle Sato, Cristina Perez, Régis Henke Scheffel, Josimeri Hebling, Mauro Luciano Baesso, Debora Lopes Salles Scheffel

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: 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). Methods: 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%). Results: 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. Significance: Modifications caused by dentin surface treatments may directly affect the performance of adhesive systems and the quality and stability of adhesive restorations.

Original languageEnglish
Article number106293
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume150
DOIs
StatePublished - Feb 2024

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • Adhesion
  • Caries-affected dentin
  • Dental adhesives
  • Dental caries
  • Dentin
  • Glutaraldehyde
  • Microtensile strength
  • Primary dentin
  • Raman spectral analysis

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

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