Physicochemical properties of a calcium aluminate cement containing nanoparticles of zinc oxide
Amanda Freitas da Rosa, Thuany Schmitz Amaral, Maria Eduarda Paz Dotto, Taynara Santos Goulart, Hebert Luis Rossetto, Eduardo Antunes Bortoluzzi, Cleonice da Silveira Teixeira, Lucas da Fonseca Roberti Garcia,
소속 상세정보
( Amanda Freitas da Rosa ) -
( Thuany Schmitz Amaral ) -
( Maria Eduarda Paz Dotto ) -
( Taynara Santos Goulart ) -
( Hebert Luis Rossetto ) -
( Eduardo Antunes Bortoluzzi ) -
( Cleonice da Silveira Teixeira ) -
( Lucas da Fonseca Roberti Garcia ) -
Abstract
Objectives: This study evaluated the effect of different nanoparticulated zinc oxide (nano-ZnO) and conventional-ZnO ratios on the physicochemical properties of calcium aluminate cement (CAC).
Materials and Methods: The conventional-ZnO and nano-ZnO were added to the cement powder in the following proportions: G1 (20% conventional-ZnO), G2 (15% conventional-ZnO + 5% nano-ZnO), G3 (12% conventional-ZnO + 3% nano-ZnO) and G4 (10% conventional-ZnO + 5% nano-ZnO). The radiopacity (Rad), setting time (Set), dimensional change (Dc), solubility (Sol), compressive strength (Cst), and pH were evaluated. The nano-ZnO and CAC containing conventional-ZnO were also assessed using scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Radiopacity data were analyzed by the 1-way analysis of variance (ANOVA) and Bonferroni tests (p < 0.05). The data of the other properties were analyzed by the ANOVA, Tukey, and Fisher tests (p < 0.05).
Results: The nano-ZnO and CAC containing conventional-ZnO powders presented particles with few impurities and nanometric and micrometric sizes, respectively. G1 had the highest Rad mean value (p < 0.05). When compared to G1, groups containing nano-ZnO had a significant reduction in the Set (p < 0.05) and lower values of Dc at 24 hours (p < 0.05). The Cst was higher for G4, with a significant difference for the other groups (p < 0.05). The Sol did not present significant differences among groups (p > 0.05).
Conclusions: The addition of nano-ZnO to CAC improved its dimensional change, setting time, and compressive strength, which may be promising for the clinical performance of this cement.
키워드
Dental cements; Nanoparticles; Physical and chemical properties; Zinc oxide
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