Tooth ('free' gingiva of decalcified tooth, human, adult)

Stain: Hematoxylin and eosin. On top part of the gingival sulcus, at the left stratified junctional epithelium normally attached to the surface of the enamel (dissolved due to decalcification). Top left shows foci of chronic inflammatory cell infiltration, left side faint stained bundle of fibers (periodontal ligament). In this case the junctional epithelium runs downwards still attached to the layer of acellular cementum. At the right dentin with faint striation due to presence of dentinal tubules