A. Taqa, A., Gh. Fathi, W. and J. Mohammed, R. 2014. Evaluation of Nickel Ion Release from Orthodontic Wires in Different Types of Artificial Saliva. Al-Rafidain Dental Journal. 14, 2 (Dec. 2014), 182–188. DOI:https://doi.org/10.33899/rden.2014.160888.