What does the slight depression of the free gingival groove on the outer surface of the gingiva correspond to?

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Quizplus · Accepted Answer

In some cases,a free gingival groove separates the attached gingiva from the marginal gingiva.The slight depression of the free gingival groove on the outer surface of the gingiva corresponds to the apical border of the inner junctional epithelium and not to the depth of the gingival sulcus.This outer groove varies in depth according to the area of the oral cavity; the groove is especially prominent on mandibular anterior teeth and premolars.

What Does the Slight Depression of the Free Gingival Groove