engleski

Microleakage of newly developed nano-ionomer and glass ionomer cement restoration

Objectives: The aim of this in-vitro study was to evaluate the marginal integrity and microleakage of newly developed nano-ionomer and glass ionomer cement after thermocycling and heating. Methods: The materials tested were nano-ionomer (Glass Carbomer, Glass Carbomer® Products, LOT 8803839) and fast setting glass ionomer (GC Fuji IX GP EXTRA, GC, LOT 0801163). Ten specimens were assigned to each material, restored and cured using an external heat source (Bluephase 16i, Ivoclar Vivadent) for 40s according manufacturer's instructions. Class V restorations were placed on lingually and vestibulary surface of each tooth filled with tested materials. All samples were stored in distilled water at 37°C for 24 hours and then thermocycled in 5°C and 55°C water bath for 1800 cycles with a 10s dwell time. After thermocycling the teeth were immersed in a silver nitrate dye solution for 24 h and embedded in acrylic resin. Samples were sectioned longitudinally through the center of the restoration. The sections were examined for microleakage. The microleakage scores were determined using the dye penetration distance ratio according to Oberholzer. The worst score of microleakage per restoration were calculated. Data were statistically analyzed by using Kruskal-Wallis and Mann-Whitney U-test. Results: The heat-cured Glass Carbomer showed lower microleakage values than fast setting glass ionomer although there were no statistically significant differences between tested materials. Conclusion: This in-vitro study emphasized the efficacy of nano-ionomer cements that can be used in routine clinical practice.

nano-ionomer cements; microleakage

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