the primary enamel cuticle, consisting of two extremely thin layers (the inner one clear and structureless, the outer cellular), covering the entire crown of newly erupted teeth and subsequently abraded by mastication; it is evident microscopically as an amorphous material between the attachment epithelium and the tooth. SYN: adamantine membrane, cuticula dentis, dental cuticle, membrana adamantina, Nasmyth cuticle, Nasmyth membrane, skin of teeth.