Journal article
Innovative magnetic treatment improves the dentin bonding performance of etch-and-rinse adhesives
International journal of adhesion and adhesives, Vol.138, 103950
03/2025
DOI: 10.1016/j.ijadhadh.2025.103950
Abstract
To evaluate the effect of etch-and-rinse two-step adhesives doped with magnetic Fe₃O₄ nanoparticles (NP), associated with an external magnet, on dentin bonding.
Teeth were restored using Adper Single Bond 2 (SB) or OptiBond S (OB) according to the following groups (n = 5): SB and OB controls; SB-FeMag and OB-FeMag (NP + external magnet); SB-Fe and OB-Fe (NP without an external magnet). NP were incorporated at 2 % concentration. The external magnet was positioned below (apical) the tooth for 30 s before curing the adhesives. Resin-dentin sticks were tested for microtensile bond strength (μTBS) and nanoleakage at 24 h and after bacterial collagenase challenge. Failure modes were categorized by stereomicroscope. Data were statistically analyzed using two-way ANOVA and Tukey's test (p < 0.05).
OB-Fe exhibited statistically higher 24 h μTBS values compared to SB-FeMag and SB-Control. After collagenase challenge, OB-Fe and SB-FeMag achieved the highest μTBS values, significantly different from SB-Fe and SB-Control. OB-Fe, OB-FeMag and SB-FeMag maintained their bond strength (p > 0.05). SB-Fe and control groups showed a significant μTBS reduction after challenge, with adhesive failures predominating in the controls. All groups exhibited silver infiltration in the hybrid layer. However, SB-control revealed a gap after collagenase challenge, while OB-FeMag reduced these silver deposits.
The incorporation of Fe3O4 nanoparticles into etch-and-rinse adhesives represents an innovative magnetic treatment that maintains stable bonding to dentin.
•Incorporating Fe3O4 into etch-and-rinse adhesives maintains a stable bond to dentin.•The association of Fe3O4 with an external magnet enhanced monomer infiltration.•The adhesives free of Fe3O4 showed reduced bond strength after bacterial challenge.
Details
- Title: Subtitle
- Innovative magnetic treatment improves the dentin bonding performance of etch-and-rinse adhesives
- Creators
- Caroline de Oliveira Teixeira - Department of Operative Dentistry, Unifametro, Fortaleza, 60010-280, Ceará, BrazilKetelyn Kerty Moreira de Oliveira - Paulo Picanço School of DentistryTainah Oliveira Rifane - Paulo Picanço School of DentistryAdyson Herbert Correia Alves - Paulo Picanço School of DentistryDavino Machado Andrade Neto - Advanced Materials Chemistry Group (GQMat), Department of Analytical and Physical Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, Fortaleza, Ceará, 60451-970, BrazilPierre Basílio Almeida Fechine - Advanced Materials Chemistry Group (GQMat), Department of Analytical and Physical Chemistry, Federal University of Ceará-UFC, Campus do Pici, CP 12100, Fortaleza, Ceará, 60451-970, BrazilMadiana Magalhães Moreira - Paulo Picanço School of DentistryVictor Pinheiro Feitosa - University of Iowa
- Resource Type
- Journal article
- Publication Details
- International journal of adhesion and adhesives, Vol.138, 103950
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.ijadhadh.2025.103950
- ISSN
- 0143-7496
- eISSN
- 1879-0127
- Language
- English
- Date published
- 03/2025
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984786443902771
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