non-surgical endodontic retreatment of anterior tooth with open apex: a report of two cases

The main reason for an endodontic failure is the persistence or regrowth of bacteria within the root canal system. retreatment of such cases is needed to irradicate the bacteria from the canals. endodontic retreatment of a tooth with open apex can be an challenge because of difficulty in obtaining an apical seal, and existing thin radicular walls which are susceptible to fracture. an apical barrier with calcium hydroxide has been the treatment of choice for such cases previously. but due its disadvantages mta has gained popularity in dealing with such cases with blunderbuss canal and open apex. this article presents two case reports of failed root canal treatment of central incisors which were successfully managed with non-surgical retreatment.