Flowable glass ionomer cement as a liner: improving marginal adaptation of atraumatic restorative treatment restorations

PURPOSE: The present study aims to evaluate the in vitro microleakage of two layers GIC proximal restorations in primary molars.METHODS: Forty primary molars received proximal cavity preparations and were randomly divided in two groups. G1 was restored with a regular powder/liquid ratio GIC. G2 firstly received a flowable layer of GIC and secondly a regular GIC layer. After 24h water storage (37 degrees C), the teeth were made impermeable with the exception of the restoration area and 1 mm of their surrounding, immersed in 0.5% methylene blue solution (4h), rinsed and sectioned mesio-distally. One side was polished and analyzed under light microscope. Replicates from the other side were observed under SEM. Microleakage evaluation was carried out by 3 evaluators.RESULTS: The data analysis (Mann-Whitney) showed a significant (PCONCLUSION: the insertion of a flowable GIC layer in proximal cavities before the insertion of a regular GIC layer improves the material adaptation to the tooth.