Mechanical characterization and ion release of bioactive dental composites containing calcium phosphate particles

Journal of the Mechanical Behavior of Biomedical Materials
Livia C NataleRoberto Ruggiero Braga

Abstract

to verify the effect of the addition of dicalcium phosphate dihydrate (DCPD) particles functionalized with di- or triethylene glycol dimethacrylate (DEGDMA or TEGDMA) on the degree of conversion (DC), post-gel shrinkage (PS), mechanical properties, and ion release of experimental composites. Four composites were prepared containing a BisGMA/TEGDMA matrix and 60 vol% of fillers. The positive control contained only barium glass fillers, while in the other composites 15 vol% of the barium was replaced by DCPD. Besides the functionalized particles, non-functionalized DCPD was also tested. DC after 24 h (n = 3) was determined by FTIR spectroscopy. The strain gage method was used to obtain PS 5 min after photoactivation (n = 5). Flexural strength and modulus (n = 10) were calculated based on the biaxial flexural test results, after specimen storage for 24 h or 60 days in water. The same storage times were used for fracture toughness testing (FT, n = 10). Calcium and phosphate release up to 60 days was quantified by ICP-OES (n = 3). Data were analyzed by ANOVA/Tukey test (alpha: 5%). Composites containing functionalized DCPD presented higher DC than the control (p < 0.001). The material containing DEGDMA-functionalized particles showe...Continue Reading

Citations

Sep 10, 2020·Brazilian Oral Research·Mateus Silva VilelaMarcela Charantola Rodrigues
Dec 9, 2020·Acta Biomaterialia·Yazi WangX X Zhu
Feb 25, 2020·Journal of the Mechanical Behavior of Biomedical Materials·Majid R AyatollahiBahador Bahrami
Aug 11, 2020·Journal of Dentistry·G S BalbinotF M Collares
Dec 1, 2019·Dental Materials : Official Publication of the Academy of Dental Materials·Gabriela de Souza BalbinotFabricio Mezzomo Collares
Aug 25, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·Roberto Ruggiero Braga
Aug 28, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Konstantina RoussouElisabeth A Koulaouzidou
Dec 24, 2021·Journal of Materials Science. Materials in Medicine·Usanee PantulapAldo R Boccaccini

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