“…Nevertheless, various authors have reported widely differing results after using the same filling material (Tang et al, 2002;Morinaga et al, 2003). According to the scientific literature, the success rate of an apictomy with consecutive retrograde filling ranges between 60 and 85% (von Axt and Kurt, 1999;Testori et al, 1999;Jensen et al, 2002;Wesson and Gale, 2003). Complete rehabilitation of the periodontal tissue in the neoapex region has also been described for the new sealer Mineral Trioxide Aggregate (MTA; Regan et al, 2002).…”