Comparative evaluation of microleakage of various retrograde filling materials: An in vitro study.

Intergroup comparisons Mineral trioxide aggregate versus composite resin with dentin bonding agent At 72 h, Student t test showed that the MTA (Group I) was highly significant when compared with the other groups, except Group II (Composite resin with dentin bonding agent), although it demonstrated less microleakage than composite, which is also in accordance with some other study.[ 20 ] The comparative sealing ability of composite resin at 72 h could be explained on the basis that the contraction gaps between composite resin and dentinal walls might have been formed during polymerization, which might have been sealed by the resin impregnation technique, leading to less microleakage values.

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