Use of MTA as Root Perforation Repair

Abstract

The larger the perforation, the greater the potential damage to the periradicular tissues. Repair of a large perforation is more complex. Hemorrhage is difficult to control and placement of an internal matrix is usually necessary. Searching for the pulp chamber or the orifices of root canals of calcified chambers or calcified roots can result in pulp chamber perforations. Roots can be perforated at different levels during cleaning and shaping. The level (coronal, mid-root, or apical) at which the perforation has occurred affects treatment planning and prognosis significantly. Appearance of fresh blood in the root canal and/or radiographic evidence of extrusion of post into the periodontium are immediate the sign of a post space perforation. The presence of a sinus tract stoma or probing defects extending to the base of a post are clinical signs of post perforation This chapter discusses various techiques for internal repair using mineral trioxide aggregate (MTA).