SEM images of enamel around the restoration with One-Up Bond F. A subsurface demineralization can be observed (Figures 5a and 5b). Higher magnification of the demarcated area from Figure 5b shows a severe subsurface demineralization (Figure 5c). The composite-enamel bonded interface (Figure 5d). (E–enamel; CR–resin composite; SE–sound enamel; DE–demineralized enamel; A–adhesive layer).