Effect of Incorporation of Bioactive Glass-Ceramic into Self-etch Adhesives

Autor(es)

Panzeri Pires-de-Souza, Fernanda de Carvalho ; Tonani-Torrieri, Rafaella ; Vivanco, Rocio Geng ; Ferraz de Arruda, Carolina Noronha ; Geraldeli, Saulo ; Coelho Sinhoreti, Mario Alexandre ; Roulet, Jean-Francois

• Tipo de documento: Artigo Científico
• Fonte: Journal of Adhesive Dentistry; v. 24, n. 1, p. 8-pg., 2022-01-01.

Resumo

Purpose: This study evaluated the effect of incorporating different concentrations of biosilicate in an experimental self-etch adhesive (SE). Materials and Methods: Biosilicate microparticles (0, 2, 5, and 10 wt%) were incorporated into the primer, and degree of conversion (DC) and wettability were tested (one-way ANOVA, Tukey's test, p < 0.05). The two best concentrations were selected (2% and 5%) for mu TBS evaluation. Sound human molars (n=20) were sectioned into quarters and randomly assigned to 4 experimental groups: 1. experimental SE + 0% biosilicate (Exp0%; negative control); 2. experimental SE + 2% biosilicate (Exp2%); 3. experimental SE + 5% biosilicate (Exp5%); 4. AdheSE (Ivoclar Vivadent, positive control). After adhesive application, Filtek Z350 (3M Oral Care) composite was built up incrementally to 5 mm. Each quarter tooth was sectioned into sticks (0.9 mm(2)) and stored in distilled water (37 degrees C) for 24 h, 6 months, or 1 year. After storage, sticks were submitted to mu TBS (0.75 mm/min). The Ca:P ratio was analyzed using scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS). Data were analyzed using two-way ANOVA with Bonferroni's correction, with statistical siginificance set at p < 0.05. Fracture patterns were observed under a digital microscope and adhesive interfaces with transmission electron microscopy (TEM). Results: Exp2% presented the highest DC (p < 0.05), Exp5% exhibited the lowest mu TBS (p < 0.05), and adhesive failures were predominant in all groups. TEM suggested remineralized areas in Exp2% and to a lesser degree in Exp5%. Exp2% and Exp5% showed a higher Ca:P ratio after aging (p < 0.05). Conclusion: The incorporation of biosilicate microparticles can improve the properties of self-etch adhesives. It increased the DC of the experimental adhesive as well as mineral deposition. However, the adhesive properties are concentration dependent, as a higher concentration of microparticles can adversely affect the mechanical properties of an adhesive. (AU)

• Processo FAPESP: 15/17917-0 - Estudo preliminar da adição de partículas de vitrocerâmica bioativa na composição de sistemas adesivos experimentais
• Beneficiário: Fernanda de Carvalho Panzeri
• Modalidade de apoio: Bolsas no Exterior - Pesquisa