Ahangari, Zohreh, and Mahdieh Karami. 2008. “Evaluation of the Sealing Ability of Amalgam, MTA, Portland Cement and Coltozol in the Repair of Furcal Perforations”. Iranian Endodontic Journal 1 (2):60-64. https://doi.org/10.22037/iej.v1i2.415.