The epithelium adhering to the surface of a dental implant or tooth surface at the base of the sulcus. It constitutes the coronal part of the biologic width. It is formed by single or multiple layers of nonkeratinizing cells. The junctional epithelial cells have a basal membrane and hemidesmosomal attachments to the implant or tooth surface.
A band of nonkeratinized stratified squamous epithelium that attaches both to the gingiva (on one side) and the crown of the tooth (on the other).