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Glass ionomer cement with calcium-releasing particles: Effect on dentin mineral content and mechanical properties.
Vilela, Handially S; Resende, Mariana C A; Trinca, Rafael B; Scaramucci, Taís; Sakae, Leticia O; Braga, Roberto R.
Afiliación
  • Vilela HS; Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
  • Resende MCA; Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
  • Trinca RB; Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
  • Scaramucci T; Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil.
  • Sakae LO; Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil.
  • Braga RR; Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil. Electronic address: rrbraga@usp.br.
Dent Mater ; 40(2): 236-243, 2024 Feb.
Article en En | MEDLINE | ID: mdl-37981512
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 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 (α = 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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Calcio / Cementos de Ionómero Vítreo Idioma: En Revista: Dent Mater Asunto de la revista: ODONTOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Calcio / Cementos de Ionómero Vítreo Idioma: En Revista: Dent Mater Asunto de la revista: ODONTOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido