Glass ionomer cement with calcium-releasing particles: Effect on dentin mineral content and mechanical properties

Autor(es)

Vilela, Handially S. ; Resende, Mariana C. A. ; Trinca, Rafael B. ; Scaramucci, Tais ; Sakae, Leticia O. ; Braga, Roberto R.

• Tipo de documento: Artigo Científico
• Fonte: Dental Materials; v. 40, n. 2, p. 8-pg., 2024-02-08.

Resumo

Objective: to evaluate the effect a glass ionomer cement (GIC) containing hydroxyapatite (HAp) or calcium silicate (CaSi) particles on mineral content and mechanical properties of demineralized dentin. Ion release and compressive strength (CS) of the cements were also evaluated. Methods: GIC (Fuji 9 Gold Label, GC), GIC+ 5%HAp and GIC+ 5%CaSi (by mass) were evaluated. Ion release was determined by induced coupled plasma optical emission spectroscopy (Ca2+/Sr2+) or ion -specific electrode (F-) (n = 3). A composite (Filtek Z250, 3 M ESPE) was used as control in remineralization tests. Demineralized dentin discs were kept in contact with materials in simulated body fluid (SBF) at 37 C-degrees for eight weeks. Mineral:matrix ratio (MMR) was determined by ATR-FTIR spectroscopy (n = 5). Dentin hardness (H) and elastic modulus (E) were determined by nanoindentation (n = 10). CS was tested after 24 h and 7d in deionized water (n = 12). Data were analyzed by ANOVA/Tukey test (alpha = 0.05). Results: Ca2+ and Sr2+ release was higher for the modified materials (p < 0.05). Only GIC+ 5%HAp showed higher F- release than the control (p < 0.05). All groups showed statistically significant increases in MMR, with no differences among them after 8 weeks (p > 0.05). No differences in dentin H or E were observed among groups (p > 0.05). HAp-modified GIC showed increased initial CS, while adding CaSi had the opposite effect (p < 0.05). After 7 days, GIC+ 5%CaSi presented lower CS in relation to control and GIC+ 5%HAp (p < 0.05). Significance: GIC modification with HAp or CaSi affected CS and increased ion release; however, none of the groups showed evidence of dentin remineralization in comparison to the negative control. (AU)

• Processo FAPESP: 20/06313-4 - Investigação de uma alternativa para potencializar a proteção da película salivar adquirida contra a erosão dental associando polímeros formadores de filme e o fluoreto de sódio
• Beneficiário: Taís Scaramucci Forlin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/12761-0 - Análise in vitro da remineralização dentinária com o uso de cimento de ionômero de vidro com ou sem partículas de ortofosfato de cálcio ou com agregado de trióxido mineral
• Beneficiário: Handially dos Santos Vilela
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 20/13983-6 - Efeito da temperatura, pH e concentração de precursores na síntese de partículas de DCPD e sua aplicação em um compósito resinoso remineralizante
• Beneficiário: Rafael Bergamo Trinca
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado