Figs. (2A & B) SEM backscatter electron images of the surface of non-demineralized dentin after control treatment and detachment (both 15 kV acceleration voltage, 500 x magnification). The displayed sections show a variable mixture of fractured resin tags located in dentinal tubules as well as empty tubules indicating adhesion failure within different depths of the hybrid layer (Fig. 2A). Furthermore, only isolated areas of separations within the adhesive/composite were evident (mid left part of Fig. (2B)).