Aim: This research evaluates the nanoleakage in Adper single bond 2, Clearfil SE
BOND 2, and G-bond plus adhesive systems . Materials and Methods: Forty-five
freshly extracted human maxillary premolar were selected for measuring their nanoleakage. The selected teeth were divided into three main groups according to adhesive
systems (n=15). Group I: etch and rinse system (Adper single bond 2), group II: self-etch
two-step system (Clearfil SE BOND 2), group III: self-etch all in one system (G-bond
Plus). Each group was divided into 3 subgroups according to storage time (n=5) (one
day, one month, six months. MOD cavity was prepared with 2.5 depth and 2 mm width
and restored with restorative materials before nanoleakage at dentin adhesive interface
is measured with a scanning electron microscope . Results: The result of this study
revealed that Adper single bond 2 is inferior to G- bond plus then Clearfil SE BOND
2 . Conclusions: Clearfil SE BOND 2 seems to be an efficient adhesive. The storage in
water for long periods has a highly significant adverse effect on the nanoleakage.