Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Ana kiran wurin da gingiva da hakori suke haɗuwa dentogingival junction. Wannan haɗin yana da nau'ikan epithelial guda uku: gingival, sulcular, da junctional epithelium. Wadannan nau'ikan guda uku sun samo asali ne daga tarin kwayoyin epithelial da aka sani da epithelial cuff tsakanin hakori da baki.Ba a fahimci abubuwa da yawa game da samuwar gingival ba, amma an san cewa hemidesmosomes sun kafa tsakanin epithelium na gingival da hakori kuma suna da alhakin haɗin epithelial na farko. Hemidesmosomes suna ba da haɗin kai tsakanin ƙwayoyin cuta ta hanyar ƙananan abubuwa masu kama da filament da ragowar ameloblasts ke bayarwa. Da zarar wannan ya faru, epithelium na junctional ya samo asali ne daga epithelium na enamel, ɗaya daga cikin samfurori na sashin enamel, kuma ya raba cikin sauri. Wannan yana haifar da karuwar girman layin epithelial na junctional da kuma keɓe ragowar ameloblasts daga kowane tushen abinci mai gina jiki. Yayin da ameloblasts suka lalace, an samar da sulcus na gingival.  Tambaya: Wace hanya ce take haifar da halittar sulcus na gingival?
ameloblasts sun lalace