Fawzia F Al Obaidi, Fouad S Salama.
In-Vitro Evaluation of Microleakage of Conventional and Resin-Modified Glass Ionomer Restorative Materials.
J Pak Dent Assoc Nov ;10(1):29-34.

OBJECTIVE: The aim of this in vitro study was to evaluate microleakage of two resin modified glass ionomer cements (Photac-Fil and vitremer) and one conventional glass ionomer cement (Ketac-Fil). MATERIALS AND METHODS: Forty-five freshly extracted human primary molars were selected and a standardized Class V cavities were prepared. Teeth were divided into 3 groups of 15 each and restored with each material. The teeth were prepared for microleakage test and then immersed in 5% methylene blue for 4 hours. The marginal microleakage was assessed according to the degree of dye penetration of the occlusal and cervical margins. RESULTS: Results showed significant difference between Ketac-Fil and Photac-Fil occlusally and cervically (P < 0.05) while no significant differences were found between Ketac-Fil and Vitremer nor between Photac-Fil and Vitremer occlusally and cervically. The microleakage scores for the three restorative materials showed that Ketac-Fil was higher than Vitremer while Photac-Fil was the lowest. CONCLUSIONS: Conventional and resin modified glass ionomer restorations placed in primary molars in vitro without thermocycling did not consistently prevent microleakage. Vitremer microleakage scores were comparable statistically to Photac-Fil and Ketac-Fil whereas it was lower in sealing ability than Photac-Fil but higher than Ketac-Fil. Generally, no significant difference in the microleakage between the occlusal and cervical margins of all glass ionomer materials tested was found.

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