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Physicochemical characterization of experimental resin-based materials containing calcium orthophosphates or calcium silicate.
Resende, Mariana C A; Vilela, Handially S; Chiari, Marina D S; Trinca, Rafael B; Silva, Flávia R O; Braga, Roberto R.
Afiliación
  • Resende MCA; Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
  • Vilela HS; Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
  • Chiari MDS; 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.
  • Silva FRO; Institute of Energy and Nuclear Research, 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(10): 1507-1514, 2024 Oct.
Article en En | MEDLINE | ID: mdl-39048463
ABSTRACT

OBJECTIVE:

To evaluate experimental dimethacrylate-based materials containing calcium orthophosphates or calcium silicate particles in terms of their optical, mechanical and Ca2+ release behaviour.

METHODS:

Dicalcium phosphate dihydrate (DCPD), hydroxyapatite (HAp), beta-tricalcium phosphate (ß-TCP) or calcium silicate (CaSi) particles were added to a photocurable BisGMA/TEGDMA resin (11 in mols) at a 30 vol% fraction. Materials containing silanized or non-silanized barium glass particles were used as controls. Degree of conversion (DC) at the top and base of 2-mm thick specimens was determined by ATR-FTIR spectroscopy (n = 5). Translucency parameter (TP) and transmittance (%T) were determined using a spectrophotometer (n = 3). Biaxial flexural strength (BFS) and flexural modulus (FM) were determined by biaxial flexural testing after 24 h storage in water (n = 10). Ca2+ release in water was determined during 28 days by inductively coupled plasma optical emission spectrometry (n = 3). Statistical analysis was performed using ANOVA/Tukey test (DC two-way; TP, %T; BFS and FM one-way; Ca2+ release repeated measures two-way, α = 5 %).

RESULTS:

CaSi and ß-TCP particles drastically reduced DC at 2 mm, TP and %T (p < 0.001). Compared to both controls, all Ca2+-releasing materials presented lower BFS (p < 0.001) and only the material with DCPD showed significantly lower FM (p < 0.05). The material containing CaSi presented the highest Ca2+ release, while among materials formulated with calcium orthophosphates the use of DCPD resulted in the highest release (p < 0.001).

SIGNIFICANCE:

CaSi particles allowed the highest Ca2+ release. Notwithstanding, the use of DCPD resulted in a material with the best compromise between optical behaviour, DC, strength and Ca2+ release.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ensayo de Materiales / Fosfatos de Calcio / Silicatos / Compuestos de Calcio 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
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ensayo de Materiales / Fosfatos de Calcio / Silicatos / Compuestos de Calcio 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