For long-term preservation of the tooth it is necessary to seal hermetically root canal, including even remote branches. Such sealing prevents re-infection of the canal and creates favorable conditions for the healing of the surrounding tissues. Incomplete filling of the root canal leads to a variety of inflammatory complications which may result in the loss of the tooth. To achieve the best results Endodontists in Delaware use for roots sealing gutta-percha. The softened gutta-percha fills the root canal completely repeating the internal surface of the channel. In this case, gutta-percha fills not only the main channel, but all of its branches that allows to obtain the best results of treatment.