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Gingival sulcus, also known as gingival crevice, refers to the space between the tooth surface and the sulcular epithelium. At the free gingival margin, the sulcular epithelium is continuous with the gingival epithelium. Both the attached gingivae and the free gingivae are included as part of the gingival epithelium.
The gingival tissue forms a crevice surrounding the tooth, similar to a miniature, fluid-filled moat, wherein food debris, endogenous and exogenous cells, and chemicals float. The depth of this crevice, known as a sulcus , is in a constant state of flux due to microbial invasion and subsequent immune response.
Leukocytes and neutrophils are the main cells that phagocytose bacteria found in the gingival crevice or pocket. They migrate from the tissues in a specialized exudate called gingival crevicular fluid also known as GCF. Neutrophils are recruited to the gingival crevice area as they are signalled to by molecules released by plaque microorganisms.
Gingival retraction or gingival recession is when there is lateral movement of the gingival margin away from the tooth surface. [1] [2] It is usually termed gingival retraction as an intentional procedure, and in such cases it is performed by mechanical, chemical, or electrical means in order to perform certain dental surgery procedures.
Gingival The direction toward the gingiva (gums), synonymous with cervical and similar to apical. However, locations on teeth already more apical to the interface of the crown and root, referred to as the CEJ , tend not to be described using this term, as it would lead to confusion, as the exact definition is ambiguous.
The gingival sulcus (G) is a small crevice that lies between the enamel of the tooth crown and the sulcular epithelium. At the base of this crevice lies the junctional epithelium, which adheres via hemidesmosomes to the surface of the tooth, and from the base of the crevice to the height of the alveolar bone (C) is approximately 2 mm.
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The main site for T. denticola habitation in the oral cavity is the gingival crevice. These spirochetes attach to proteins (including fibronectin and collagen) of local gingival fibroblasts, binding to their plasma membrane.