The aim of this in vitro study was to evaluate the
microleakage on the gingival margin located below the cemento-enamel
junction of class II composite restorations (CR ,Tetric-ceram,Vivadent)
applied with a 5th generation bonding material (Excite,Vivadent) and to
compare it with that seen in open sandwich restorations using a
nanoionomer material (OST ,Ketac N100,3M) and a composite material
(Tetric-ceram).
