NAAOM, D. E. R. Effect of preventive periodontal health education on the oral hygiene of primary school children. Mustansiria Dental Journal, [S. l.], v. 6, n. 4, p. 402–407, 2018. DOI: 10.32828/mdj.v6i4.493. Disponível em: https://mdj.uomustansiriyah.edu.iq/index.php/mdj/article/view/493. Acesso em: 27 apr. 2024.