Figure 2.

AFM image (deflection) of the interface between a dental composite and dentin.

Notes: The dental composite appears very homogeneous, whereas the cross-sectional cut of dentin can be seen throughout the dentin part. The interface shows no apparent gaps. Compromised interface integrity, however, leads to nanoleakage that is always associated with pain, sensitivity, recurrent decay, and finally, failure of restorations.

Abbreviation: AFM, atomic force microscopy.