Non-surgical retreatment of a failed apicoectomy without retrofilling using white mineral trioxide aggregate as an apical barrier

root-end resected teeth with persistent apical periodontitis are usually retreated surgically or a combination of non-surgical and surgical retreatment is employed. however, patients are sometimes unwilling to be subjected to a second surgical procedure. the apical barrier technique that is used for apical closure of immature teeth with necrotic pulps may be an alternative to non-surgically retreat a failed apicoectomy. mineral trioxide aggregate (mta) has become the material of choice in such cases because of its excellent biocompatibility, sealing ability and osseoinductive properties. this case report describes the non-surgical retreatment of a failed apicoectomy with no attempt at retrofilling of a maxillary central incisor. white mta was used to induce apical closure of the wide resected apical area. four-year follow-up examination revealed an asymptomatic, fully functional tooth with a satisfactory healing of the apical lesion. white mta apical barrier may constitute a reliable and efficient technique to non-surgically retreat teeth with failed root-end resection. the predictability of such a treatment is of great benefit for the patient who is unwilling to be submitted to a second surgical procedure.