Influence of external energy sources on the dynamic setting process of glass-ionomer cements

•The setting process of glass-ionomer restorative materials was evaluated by Fourier Transform Infrared spectroscopy (FTIR).•External activation sources typically but not always increase the setting rate of restorative GICs.•The FTIR data provides quantitative information on the dynamics of the chan...

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Bibliographic Details
Published in:Dental materials 2019-03, Vol.35 (3), p.450-456
Main Authors: de Oliveira, Bruna M.B., Agostini, Izabelle E., Baesso, Mauro L., Menezes-Silva, Rafael, Borges, Ana Flávia S., Navarro, Maria Fidela L., Nicholson, John W., Sidhu, Sharanbir K., Pascotto, Renata C.
Format: Article
Language:English
Subjects:
Bioglass
Carbonyls
Dental cement
Dentistry
Energy resources
Energy sources
Fourier Transform Infrared spectroscopy
Fourier transforms
Glass ionomer cements
Gold
Light emitting diodes
Ultrasonic imaging
Ultrasonics
Ultrasound
Variance analysis
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Summary:•The setting process of glass-ionomer restorative materials was evaluated by Fourier Transform Infrared spectroscopy (FTIR).•External activation sources typically but not always increase the setting rate of restorative GICs.•The FTIR data provides quantitative information on the dynamics of the changes in the material, relevant for future studies. To evaluate the influence of external energy sources on the dynamic setting process of glass-ionomer restorative materials. Eighteen brands of GIC were studied: Bioglass R (Biodinâmica; G1), Chemfil Rock (Dentsply; G2), Equia Forte (GC; G3), Gold Label 2 (GC; G4), Gold Label 9 (GC; G5), Glass Ionomer Cement Type II — (Shofu; G6), Ionglass R (Maquira; G7), Ion Z (FGM; G8), Ionomaster (Wilcos; G9), Ionofil Plus (Voco; G10), Ionostar Plus (Voco; G11), Ketac Molar easymix (3M ESPE; G12), Magic Glass R (Vigodent; G13), Maxxion R (FGM; G14), Riva Self Cure (SDI; G15), Vidrion R (SS White; G16), Vitro Fil R (Nova DFL; G17) and Vitro Molar (Nova DFL; G18). LED, halogen light or ultrasound (n=20 for each set) applied for 30s was used to activate setting, and a control group of each material was allowed to set without activation. Samples were analyzed by FTIR spectroscopy using the ratio of intensities of bands at 1637cm−1 (carboxylate) and 1720cm−1 (carbonyl) as a function of time. Means and standard deviations were subjected to ANOVA and Tukey tests (p0.05). External activation sources, namely LED, halogen light and ultrasound, typically but not always increase the setting rate of restorative GICs.
ISSN:0109-5641
1879-0097
DOI:10.1016/j.dental.2019.01.003