Introduction: Revascularization/revitalization therapy is considered an alternative procedure for management of teeth with an immature apex and necrotic pulp, mainly when root development is interrupted in the early phases of formation. However, this clinical treatment protocol should be considered a permanent procedure?
Method: A maxillary central incisor with a previous and successful RR treatment was intentionally filled with a biocompatible material with the periapical tissues due to the patient's lack of adherence to the follow-up protocol.
Results: The 20-month follow-up showed absence of clinical, radiological and tomographic signs and symptoms of an endodontic re-infection.
Conclusion: This case demonstrates that once the increased thickening of the canal walls, incrementing the root length, apical closure and the total resolution of the apical lesion are observed, the main canal of a previously treated tooth with an RR procedure can be filled.
Keywords: Immature permanent tooth; mineral trioxide aggregate; revascularization/revitalization; root canal filling.