title: [Observations on the causes of retention of upper central incisors].
mesh_terms: D006801:Humans; D007180:Incisor / Q000002:abnormalities; D014083:Tooth Germ / Q000293:injuries; D014094:Tooth, Deciduous / Q000293:injuries; D014095:Tooth, Impacted / Q000209:etiology; D014097:Tooth, Unerupted / Q000209:etiology*
vernacular_title: Poznámky k prícinám retence horních stredních rezáků.