Dataset related to the Oral Health Epidemiological Survey conducted with 12 years-old children from public schools of the urban area of Quito - Ecuador. data is related to anonymized information on demographic and socioeconomic characteristics of the children, as well as data related to dental caries, fluorosis, dental traumatic injuries, malocclusion, gingival bleeding, presence of calculus and access to dental services. Moreover, data related to academic performance was also collected. Contextual variables related to the school environment are also disponible in the dataset sheet.