K Al -Hamadani, A., and E. T Al-Jwary. “Effect of Artificial Salvia on Force Values of Two Types of Nickel Titanium Ortho-Dontic Arch Wires”. Al-Rafidain Dental Journal, vol. 12, no. 2, Dec. 2012, pp. 301-8, doi:10.33899/rden.2012.65064.