Fig. 1.

(a) Reflection mode confocal image of the dentin–Biodentine™ interface showing the highly reflective band (bracket). The micro-permeability of the Rhodamine-B dye solution was reduced which was demonstrated by the fluorescence mode image of the same area (b). (c) The mineral infiltration zone (MIZ) is characteristic for the interfacial dentin underneath the Biodentine™ cement: tag-like structures forming within the dentinal tubules (tip of arrow) have interrupted the dye solution permeating from the pulp chamber (base of arrows). (d) The ion exchange layer in the dentin–GIC interface with the scalloped appearance in the inter-tubular dentin (arrows) as a result of the acidic nature of the setting cement demineralizing the intra-tubular dentin.