Scholarlink

Objective <p>This study aimed to evaluate the effects of a novel phosphosilicate bioactive glass (BG)-containing primer on dentin bond strength, nanoinfiltration, and the biomechanical and ultrastructural properties of the dentin-primer interface.</p> Methods <p>A primer was formulated with 7.5% (w/w) phosphosilicate BG particles (SiO₂·P₂O₅·Na₂O·CaO; particle size 0.2–10&#xa0;μm) suspended in distilled water.</p> <p>Four groups were tested (<i>n</i> = 5): (1) control groups using an etch-and-rinse (ER) or self-etch (SE) adhesive strategy per manufacturer’s instructions, and (2) experimental groups where the BG-primer was applied before the ER or SE adhesive (designated BG-ER and BG-SE, respectively).</p> <p>Specimens were subjected to micro-tensile bond strength (µTBS) testing immediately and after 12 months of aging in distilled water (37&#xa0;°C). Nanoleakage was assessed by SEM (<i>n</i> = 3 per group). The chemical profile and ion-release potential of the BG-primer were analyzed using ATR-FTIR spectroscopy under dry conditions, immediately after hydration, and after six hours. Data were analyzed using two-way ANOVA and Tukey’s test (α = 0.05).</p> Results <p>The incorporation of the BG-primer did not significantly affect immediate µTBS compared to control strategies. However, after 12 months, both BG-ER and BG-SE exhibited significantly higher µTBS values than their respective controls. The BG-ER group maintained its bond strength over time, while the BG-SE showed a significant increase. Nanoleakage analysis revealed comparable silver nitrate in filtration among all groups. SEM identified BG particles localized near the hybrid layer and partial dentinal tubule occlusion in BG-treated specimens. ATR-FTIR confirmed sustained ionic release and time-dependent chemical shifts, evidenced by decreased crystallinity upon aqueous exposure and spectral shifts indicating persistent ionic reactivity.</p> Conclusion <p>Incorporation of a BG-containing primer improved the long-term stability of resin–dentin bonds without compromising immediate adhesion, supporting its potential to enhance the durability of adhesive interfaces.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of bioactive glass primer on dentin bonding durability and interface properties

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月17日

查看全文
  • Macarena Aburto,
  • Jael Escobar,
  • Miguel Angel Muñoz,
  • Issis V Luque-Martinez

摘要

Objective

This study aimed to evaluate the effects of a novel phosphosilicate bioactive glass (BG)-containing primer on dentin bond strength, nanoinfiltration, and the biomechanical and ultrastructural properties of the dentin-primer interface.

Methods

A primer was formulated with 7.5% (w/w) phosphosilicate BG particles (SiO₂·P₂O₅·Na₂O·CaO; particle size 0.2–10 μm) suspended in distilled water.

Four groups were tested (n = 5): (1) control groups using an etch-and-rinse (ER) or self-etch (SE) adhesive strategy per manufacturer’s instructions, and (2) experimental groups where the BG-primer was applied before the ER or SE adhesive (designated BG-ER and BG-SE, respectively).

Specimens were subjected to micro-tensile bond strength (µTBS) testing immediately and after 12 months of aging in distilled water (37 °C). Nanoleakage was assessed by SEM (n = 3 per group). The chemical profile and ion-release potential of the BG-primer were analyzed using ATR-FTIR spectroscopy under dry conditions, immediately after hydration, and after six hours. Data were analyzed using two-way ANOVA and Tukey’s test (α = 0.05).

Results

The incorporation of the BG-primer did not significantly affect immediate µTBS compared to control strategies. However, after 12 months, both BG-ER and BG-SE exhibited significantly higher µTBS values than their respective controls. The BG-ER group maintained its bond strength over time, while the BG-SE showed a significant increase. Nanoleakage analysis revealed comparable silver nitrate in filtration among all groups. SEM identified BG particles localized near the hybrid layer and partial dentinal tubule occlusion in BG-treated specimens. ATR-FTIR confirmed sustained ionic release and time-dependent chemical shifts, evidenced by decreased crystallinity upon aqueous exposure and spectral shifts indicating persistent ionic reactivity.

Conclusion

Incorporation of a BG-containing primer improved the long-term stability of resin–dentin bonds without compromising immediate adhesion, supporting its potential to enhance the durability of adhesive interfaces.