Microleakage of three conventional glass ionomers using 45Ca and methylene blue.

This study sought to compare the sealing ability of two conventional ionomers and a new intermediate/provisional ionomer formulation using sequential applications of two different tracer methodologies. Thirty freshly extracted (< 6 months) human third molars, stored in 0.1% sodium azide solution, were divided randomly into three experimental groups for preparation of simulated Class V caries at the cementoenamel junction of the facial surfaces.