RETROGRADE FILLING MATERIALS AND RECENT ADVANCES: A LITERATURE REVIEW.

The purpose of root end filling is to establish a seal between the root canal space and periradicular tissues. Almost every available dental restorative material has been used as root end filling material. Unlike the orthograde root canal filling materials root end filling materials are placed in direct contact with the vital periapical tissues. So thus the tissue responses of these materials become important and may influence the outcome of surgical endodontic treatment. This article reviews different root-end filling materials and compare their biocompatibility, sealing ability, anti-bacterial effects and microleakage.