Sealing ability of MTA and portland cement as apical plugs in an immature apex modelR95Al-amoudi, O. A.H.Albayoumi, M. A.Amin, S. A.Author informationDepartment of Endodontics, Faculty of Dentistry, Cairo University, Cairo, EgyptInternational Endodontic Journal 42(12):p 1154, December 2009.Copyright © 2009 Blackwell Publishing Ltd.