Long-term interdisciplinary management of severe post-traumatic external inflammatory root resorption in an adolescent: A 10-year follow-up case report

External inflammatory root resorption is a pathologic process that commonly develops following mechanical damage to the cementum during traumatic dental injury. This case report presents the long-term interdisciplinary management of an avulsed immature maxillary central incisor complicated by severe external inflammatory root resorption. A 10-year-old patient presented with bleeding gingival tissue adjacent to the maxillary right central incisor. The medical history revealed that three years earlier, the patient had sustained an avulsion of tooth #11, which had been subsequently replanted. Clinical and radiographic examinations confirmed severe external inflammatory root resorption. Initial treatment consisted of root canal obturation with mineral trioxide aggregate followed by composite crown restoration. However, after nineteen months, the resorption progressed rapidly, resulting in crown fracture. Consequently, a decoronation procedure was performed. A removable orthodontic appliance was then used to preserve the alveolar bone space for nine years. At the age of 20, the patient underwent dental implant placement and restoration with a zirconia crown. This interdisciplinary and staged treatment approach ensured both functional stability and satisfactory aesthetic outcomes throughout all phases of management.