AI Article Synopsis
- The study aimed to assess how different concentrations of calcium chloride (CaCl2) affect the surface hardness of two high-viscosity glass ionomer cements (GICs): Fuji IX GP and GlasIonomer FX-II.
- Both types of GICs were immersed in varying concentrations of CaCl2 for either 1 day or 1 week, followed by tests such as microhardness testing and X-ray diffraction to evaluate changes in hardness.
- Results indicated that higher CaCl2 concentrations led to greater increases in surface hardness, attributed to the absorption of calcium ions that reacted with unreacted carboxylic acids in the cement.
Article Abstract
The objective of this study was to evaluate the effect of the concentration of calcium chloride (CaCl2) solution on the surface hardness of restorative glass ionomer cements (GICs). Two high-viscosity GICs, Fuji IX GP and GlasIonomer FX-II, were immersed in several concentrations of CaCl2 solution for 1 day and 1 week. The immersed specimen surfaces were evaluated using microhardness testing, grazing incidence X-ray diffraction, and energy-dispersive X-ray spectroscopy. Immersion in a higher concentration of CaCl2 solution produced a greater increase in the surface hardness. No crystalline substance was observed on the immersed surface. Calcium ions were selectively absorbed in the matrix of the GIC surface after immersion. They reacted with the non-reacted carboxylic acid groups remaining in the cement matrix. These reactions were considered to cause an increase in the surface hardness of the GICs.
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| http://dx.doi.org/10.4012/dmj.2013-143 | DOI Listing |
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