Yes there is a correction that junctional epithilium does not directly attached on tooth surface , first of all it attached with hemidesmosomes and then hemidesmosomes attached to the basal lamina
The junctional epithelium, a nonkeratinizedstratified squamous epithelium,[1] lies immediately apical to the sulcular epithelium, which lines the gingival sulcus from the base to the free gingival margin, where it interfaces with the epithelium of the oral cavity. The gingival sulcus is bounded by the enamel of the crown of the tooth and the sulcular epithelium. Immediately apical to the base of the pocket, and coronal to the most coronal of the gingival fibers is the junctional epithelium. Reference: en.m.wikipedia.org/wiki/Junctional_epithelium
The sulcular epithelium lines the gingival sulcus, not the junctional epithelium, JE attaches the gingiva to the teeth and is found apical to the depth of sulcus.
