HEGAB, M. M.; ABDELKAWY, M. Classification of Periodontal Diseases – Old is Gold or New is Bold? A Survey Study in Egypt. Perio J, [S. l.], v. 4, n. 1, p. 11–23, 2020. DOI: 10.26810/perioj.2020.a2. Disponível em: https://perioj.com/ojs/index.php/perioj/article/view/46. Acesso em: 28 mar. 2024.