Evaluation of Effect of Saliva pH Change on Release of Nickel and Chromium Ions from Orthodontic Wires (an In vitro study). Journal of Hama University , [S. l.], v. 1, n. 4, 2019. Disponível em: https://hama-univ.edu.sy/ojs/index.php/huj/article/view/82. Acesso em: 25 apr. 2026.