Mineral trioxide aggregate (MTA) has gained a good acceptance due to its wide range of clinical application in dentital practice.It is a very good biocompatible material a perfect choice for endodontic repair. Excellent results are observed when used as a root end filling material, a direct pulp capping agent and for root perforation repair. Continuing research and long term clinical studies are needed to confirm and consolidate present findings.The purpose of this book is to review the composition, properties, products, and clinical aspects of mineral trioxide aggregate (MTA)