Screening the Periodontal Health Status and Oral Hygiene Practice in Preschool and Primary School Children. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), [S. l.], v. 38, n. 2, p. 81–96, 2021. DOI: 10.55562/jrucs.v38i2.228. Disponível em: https://jrucs.iq/index.php/JAUCS/article/view/228. Acesso em: 16 apr. 2026.