free gingival groove

free gin·gi·val groove

(frē jin'ji-văl grūv)
A shallow linear depression between attached and marginal gingiva.

free gin·gi·val groove

(frē jin'ji-văl grūv)
Shallow linear notch that demarcates attached gingival tissue from free gingival tissue.
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References in periodicals archive ?
Orban (1948) appears to be the first to describe the term attached gingiva, he divided gingiva into free and attached gingiva demarcated by free gingival groove. According to him, FGG is at appropriate level of the bottom of gingival sulcus.