Thickening of the canal walls, continuation of root development and closure of the apical opening. a) Initial condition with osteolytic lesion (arrows). The patient was referred after emergency treatment and application of calcium hydroxide; b) Radiography immediately after revascularization; c) Control after 6 months; d) Follow-up after 18 months, showing thickening of the canal walls, continued root development, closure of the apex in the distal root, and healing of the periapical lesion around the mesial root.