SUMMARYIn this article the apical resection by Rehrmann's metod is desribed and its indications are discussed.Since Rehrmann's technique may be used with acucracy and convienience by the help of standart measuring instruments, it is one of the most safe tecniques in this field. The greatst advantage of this method is the closure of the canal hermetically as if by an inley.The use of silver as canal inley, because of the oligodynamic effect of this metai, gives us a chance to benefit from a continous desinfection power.In the Sight of our experience we ere satisfied with Rehrmann's technique for the apical resection which in many instances is the only remedy to save a tooth.