. Other letters: A, crown
of the tooth
, covered by enamel
. B, root of the tooth, covered by cementum
. C, alveolar bone
. D, subepithelial connective tissue
. E, oral epithelium
. F, free gingival margin
. H, principal gingival fibers
. I, alveolar crest fibers of the PDL
. J, horizontal fibers of the PDL. K, oblique fibers of the PDL.
The gingival sulcus is an area of potential space between a tooth and the surrounding gingival tissue and is lined by sulcular epithelium. The depth of the sulcus (Latin for groove) is bounded by two entities: apically by the gingival fibers of the connective tissue attachment and coronally by the free gingival margin.
A periodontal pocket is a dental term indicating the presence of an abnormally deepened gingival sulcus.