摘要：Immature teeth with necrotic pulp and large periapical lesion are difficult to treat via conventional endodontic therapy. The role of materials such as calcium hydroxide and Mineral trioxide aggregate (MTA) are indispensable. These case reports present successful healing and apexification using MTA. Methods: The case reports present two cases with traumatized upper anterior teeth. The radiographic evaluation revealed open apices with blunderbuss canals; the canal was cleaned using intracanal instruments and 5.25% NaOCl and final irrigation with 2% chlorohexidine. To obtain canal disinfection slurry of calcium hydroxide was temporized in the canal. In subsequent appointments 3-4mm apical stop was created with mineral trioxide aggregate and allowed to set. Subsequently the root canals were obturated with thermoplasticized guttapercha. A composite resin restoration sealed the access cavity. A 3 month, 6 month and 1 year follow-up revealed clinically asymptomatic and adequately functional tooth. Results: A positive clinical resolution of this case is encouraging for the use of white MTA as a apical plug, in immature teeth with open apex. Conclusion: Apexification in one step using an apical plug of MTA can be considered a predictable treatment and may be an alternative to use a long term calcium hydroxide apexification.
