Root lengthening with apical closure in two maxillary immature permanent central incisors after placement of mineral trioxide aggregate (MTA) as an apical plug.

BACKGROUND: Necrosis of permanent immature teeth is a common reason for consultation in paediatric dentistry. Apexification is a therapeutic procedure aiming to create an apical calcified barrier in open apex teeth. CASE REPORT: Two cases are presented in which apexification were completed on immature permanent traumatised incisors using a mineral trioxide aggregate (MTA) plug. FOLLOW-UP: At 2 and 5 years showed apical closure and radicular elongation beyond the MTA plug. CONCLUSION: Unexpectedly, a regeneration of mineral tissues beyond the MTA plug occurred which is an uncommon outcome.