Therapeutic endodontic treatment is not always possible for various reasons. There is need for methods of endodontic surgery, particularly retrograde filling. Actual direction is to study the efficiency of the use of a filling material for root canals of teeth roots. We have experimentally studied the apical mikropermeability filling materials «MTA ProRoot», «Trioksident», «Rutdent», «Biodentine», «Ketac Cem»; proven advantage calcium materials to glass ionomer cements.
boundary permeability, retrograde filling, filling material