Sorption of moisture and resistance to acid dissolution of two restoration glass ionomers: in vitro study
DOI:
https://doi.org/10.59334/ROV.v2i33.401Keywords:
Dental cements, glass ionomer, solubility, dental materials, acid erosion, DeSCAbstract
Introduction: Glass Ionomer has certain clinical disadvantages, such as fragility and moisture sensitivity,
which might reduce the restauration´s lifespan. This effects, such as water absorption and acid solubility
may damage the restauration, cause fracture and marginal filtration, this could trigger cavity relapse and the
loss of the correct mechanical properties. Objective: Compare in vitro moisture sorption and acid solution of
two restoration ionomers. Method: 20 samples of Ketac molar glass ionomer and 20 of Fuji II were made. A
first weight measurement was made with precision scales, obtaining an initial weight. The specimens were
submerged in distilled water for 24 hours, stored in a heater; Each sample was weighed with a precision
balance, establishing the percentage of moisture absorbed from the initial weight. Subsequently, the samples
were submerged in 3% citric acid solution for 24 hours, to be re-weighed, evaluating the loss of material due to
erosive action of the acid in percentage of weight. Conclusions: The moisture sorption by weight was 2.59% in
the molar ketac and 1.45% in the Fuji II; When comparing the samples using the t-test, statistically significant differences were obtained. The percentage of material loss due to erosive action of the acid was 10.81% for molar
Ketac and 18.62% for Fuji II; When comparing the samples using the t-test, statistically significant differences
were obtained. It was concluded that the moisture sorption was higher in the molar Ketac and the greatest
solubility to the action of citric acid was Fuji II.
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