In endodontics, Ultrasonics offers many applications and advantages. Improved visualization combined with a more conservative approach when selectively removing tooth structure, particularly in difficult situations in which a specific angulation or tip design permits access to restricted work areas, offers opportunities that are not possible with conventional treatment. As a result, access refinement, location of calcified canals and removal of separated instruments or posts have generated more predictable results. In addition, better action of irrigation solutions and condensation of gutta-percha have benefited from the use of ultrasonics. Rootend cavity preparation followed by placement of materials in an area that is more often than not constrained has especially improved the quality of treatment and long-term success. Finally, integration of new technologies such as ultrasonics, leading to improved techniques and use of materials, has changed the way endodontics is being practiced today.