Address for correspondence:

The main objective of endodontic treatment of pulpless necrotic teeth is removal of maximum possi-ble bacteria and their byproducts from the root canal system and then finally completely seal the disin-fected root canals in three dimensions. In treatment of infected root canals the number of appointments needed to achieve disinfection of the root canal sys-tem is controversial. The concept of interappointment dressing in multiple visit endodontic therapy is well documented in endodontic literature. Many materials have been suggested for use as interappointment dressing. Research on endodontic microbiology and biofilms have demystified few earlier concepts an