Evaluation of Effect of Saliva pH Change on Release of Nickel and Chromium Ions from Orthodontic Wires (an In vitro study). مجلة الجامعة [Internet]. 2019 Jul. 18 [cited 2026 Apr. 25];1(4). Available from: https://hama-univ.edu.sy/ojs/index.php/huj/article/view/82