S Minwah, B., Sh Hussain, W., & M Khlaif, H. (2012). The Success rate of Retrograde Filling Materials in Re-apicectomized Teeth using Mineral Trioxide Aggregate (MTA) and Zinc free Amalgam (A comparative clinical study). Al-Rafidain Dental Journal, 12(1), 171–176. https://doi.org/10.33899/rden.2012.45451