Impact of silanization of different bioactive glasses in simplified adhesives on degree of conversion, dentin bonding and collagen remineralization

To analyze simplified adhesive containing pure or silanized bioglass 45S5 (with calcium) or Sr-45S5 (strontium-substituted) fillers applied on dentin and to evaluate the microtensile bond strength (µTBS), interface nanoleakage, degree of conversion of adhesive, collagen degradation and remineralizat...

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Published in:Dental materials 2023-02, Vol.39 (2), p.217-226
Main Authors: Rifane, Tainah Oliveira, Cordeiro, Karen Evellin Moura, Silvestre, Francisbênia Alves, Souza, Marina Trevelin, Zanotto, Edgar Dutra, Araújo-Neto, Vitaliano Gomes, Giannini, Marcelo, Sauro, Salvatore, de Paula, Diego Martins, Feitosa, Victor Pinheiro
Format: Article
Language:English
Subjects:
Adhesives
Bioglass
Biological activity
Bond strength
Bonding strength
Collagen
Conversion
Dental Bonding
Dental Cements
Dentin
Dentin-Bonding Agents - chemistry
Etching
Humans
Hydroxyproline
Interfaces
Materials Testing
Molars
Phosphoric acid
Raman spectroscopy
Remineralization
Resin Cements - chemistry
Silanization
Spectrum analysis
Statistical analysis
Strontium
Substitutes
Tensile Strength
Ultraviolet spectroscopy
Variance analysis
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Summary:To analyze simplified adhesive containing pure or silanized bioglass 45S5 (with calcium) or Sr-45S5 (strontium-substituted) fillers applied on dentin and to evaluate the microtensile bond strength (µTBS), interface nanoleakage, degree of conversion of adhesive, collagen degradation and remineralization. Ambar Universal adhesive (FGM) was doped with 10 wt% bioactive glasses to form following groups: Control (no bioglass), 45S5 (conventional bioglass 45S5), Sr-45S5 (Sr-substituted bioglass 45S5), Sil-45S5 (silanized bioglass 45S5) and Sil-Sr-45S5 (silanized bioglass Sr-45S5). Adhesives were applied after dentin acid-etching using phosphoric acid at extracted human molars. Resin-dentin sticks were obtained and tested for µTBS, nanoleakage at 24 h or 6 months. Degree of conversion was measured using micro-Raman spectroscopy. Dentin remineralization was assessed by FTIR after 6-month storage in PBS. Hydroxyproline (HYP) release was surveyed by UV-Vis spectroscopy. Statistical analysis was performed using ANOVA and Tukey’s test (p  0.05). Control (p = 0.018) and Sil-Sr-45S5 (p 
ISSN:0109-5641
1879-0097
DOI:10.1016/j.dental.2023.01.005