Physicochemical characterization of experimental resin-based materials containing calcium orthophosphates or calcium silicate

To evaluate experimental dimethacrylate-based materials containing calcium orthophosphates or calcium silicate particles in terms of their optical, mechanical and Ca2+ release behaviour. Dicalcium phosphate dihydrate (DCPD), hydroxyapatite (HAp), beta-tricalcium phosphate (β-TCP) or calcium silicate...

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Bibliographic Details
Published in:Dental materials 2024-10, Vol.40 (10), p.1507-1514
Main Authors: Resende, Mariana C.A., Vilela, Handially S., Chiari, Marina D.S., Trinca, Rafael B., Silva, Flávia R.O., Braga, Roberto R.
Format: Article
Language:English
Subjects:
Calcium orthophosphate
Calcium silicate
Ion release
Mechanical properties
Optical properties
Resin materials
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Summary:To evaluate experimental dimethacrylate-based materials containing calcium orthophosphates or calcium silicate particles in terms of their optical, mechanical and Ca2+ release behaviour. Dicalcium phosphate dihydrate (DCPD), hydroxyapatite (HAp), beta-tricalcium phosphate (β-TCP) or calcium silicate (CaSi) particles were added to a photocurable BisGMA/TEGDMA resin (1:1 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 β-TCP particles drastically reduced DC at 2 mm, TP and %T (p 
ISSN:0109-5641
1879-0097
1879-0097
DOI:10.1016/j.dental.2024.07.002