Innovative magnetic treatment improves the dentin bonding performance of etch-and-rinse adhesives

IF 3.2 3区材料科学 Q2 ENGINEERING, CHEMICAL International Journal of Adhesion and Adhesives Pub Date : 2025-01-30 DOI:10.1016/j.ijadhadh.2025.103950

Caroline de Oliveira Teixeira , Ketelyn Kerty Moreira de Oliveira , Tainah Oliveira Rifane , Adyson Herbert Correia Alves , Davino Machado Andrade Neto , Pierre Basílio Almeida Fechine , Madiana Magalhães Moreira , Victor Pinheiro Feitosa

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Abstract

Objective

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.

Material and methods

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).

Results

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.

Conclusions

The incorporation of Fe₃O₄ nanoparticles into etch-and-rinse adhesives represents an innovative magnetic treatment that maintains stable bonding to dentin.

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来源期刊

International Journal of Adhesion and Adhesives 工程技术-材料科学：综合

CiteScore

6.90

自引率

8.80%

发文量

200

审稿时长

8.3 months

期刊介绍： The International Journal of Adhesion and Adhesives draws together the many aspects of the science and technology of adhesive materials, from fundamental research and development work to industrial applications. Subject areas covered include: interfacial interactions, surface chemistry, methods of testing, accumulation of test data on physical and mechanical properties, environmental effects, new adhesive materials, sealants, design of bonded joints, and manufacturing technology.