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Related to marginal gingiva: attached gingiva
The crest of the free gingiva surrounding the tooth like a collar. It is about 1 mm wide and forms the soft tissue portion of the gingival sulcus.
See also: gingiva
free gin·gi·va(frē jin'ji-vă)
Portion of gingiva that surrounds a tooth and is not directly attached to tooth surface; outer wall of the gingival sulcus.