AFZAL, S.; SHAH, A. M.; KHAN, T. A.; AFZAL, F.; BANO, S. Oral hygiene status of orthodontic patients using hyrax expander. Pakistan Orthodontic Journal, [S. l.], v. 8, n. 2, p. 80–84, 2017. Disponível em: https://poj.org.pk/index.php/poj/article/view/142. Acesso em: 21 apr. 2026.