A cikin wannan mahallin, akwai nau'i uku na epithelial: gingival, sulcular, da kuma junctional epithelium. Wadannan nau'i uku sun samo asali ne daga wani nau'i na ƙwayoyin epithelial da aka sani da epithelial cuff tsakanin hakori da baki. Ba a fahimta sosai game da samuwar gingival ba, amma an san cewa hemidesmosomes sun kafa tsakanin epithelial na gingival da hakori kuma suna da alhakin haɗin epithelial na farko. Hemidesmosomes suna ba da haɗin kai tsakanin ƙwayoyin ta hanyar ƙananan filament-kamar tsarin da ragowar ameloblasts suka bayar. Da zarar wannan ya faru, epithelium junctional ya rage daga epithelium na enamel, ɗaya daga cikin enamel na jikin, kuma ya rabu da sauri. Wannan yana haifar da ci gaba da girma a cikin girman ƙwayar epithelial da aka sani da cuff tsakanin hakori da baki. Tambaya: Menene sakamakon halitta daga kowane nau'i na sulcus?
ameloblasts sun lalace