ArticleRevista cientifica odontologica (Universidad Cientifica del Sur)
Comparative Evaluation of Two Modified Glass Ionomer Cements with Conventional Glass Ionomer Cement for Fracture Toughness using 3-point Bending Test.
Article in Revista cientifica odontologica (Universidad Cientifica del Sur). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: The purpose of this study was to evaluate and compare the fracture toughness of Advanced glass hybrid Glass Ionomer Cement (GIC), Zirconium reinforced GIC and conventional GIC using 3-point bending test. Materials and Methods: Three groups were formed in the present study, Group 1 (Hybrid GIC), Group 2 (Zirconomer Improved), Group 3 (Conventional GIC) which were tested at 24 hours and 7 days time interval according to their storage time in artificial saliva. Samples of each material were prepared with the help of customized mould of dimensions 25 mm*5 mm*2.5 mm and stored for 24 hours and 7 days in artificial saliva. The fracture toughness testing was done in a 3-point bend apparatus using Universal Testing Machine with a crosshead speed of 1 mm/min until failure. The mean fracture toughness values were compared using two-way ANOVA followed by post hoc (Bonferreni). The values at 24 hours and 7 days were compared using paired t-test. Results: At 24 hours and 7 days, Advanced Glass Hybrid GIC showed the highest fracture toughness values, while the lowest values were observed with conventional GIC. A statistically significant difference was seen between Advanced Glass Hybrid GIC and conventional GIC at 24 hours. Zirconium reinforced GIC showed intermediate values. In intra-group comparison, an increase in values was seen with all 3 materials at 7 days, however the difference was statistically insignificant. Conclusions: Advanced Glass Hybrid and Zirconium reinforced GIC showed better fracture toughness than the Conventional GIC. Fracture toughness of GICs was influenced by time.
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