Dental Caries : Histology
Fig – A/B : Penetrating advanced dentin caries, with carious opening into the pulpal tissue and adjacent necrosis.
Fig – C/D : Dilation of the dentinal tubules as ampullae and garlands (zones 1–3).
Fig – E/F : Bacterial expansion of dentinal tubules.
Fig – G : Bacteria can also penetrate into a tubular reparative dentin (zone 6).