Abstract

Pre-eruptive intracoronal resorption (PEIR) is a non-carious radiolucent defect typically found within the den-tin of unerupted teeth. This report describes three pediatric cases involving PEIR in a mandibular second mo-lar, maxillary canine, and maxillary first premolar, each showing unique clinical and radiographic features. Treatment decisions were based on lesion size, pulpal proximity, eruption stage, and symptoms, and included surgical exposure, indirect or direct pulp capping with calcium silicate-based materials, and restoration using glass ionomer cement or composite resin. Follow-up periods ranging from several months to 10 years revealed stable outcomes without lesion progression, symptoms, or need for endodontic therapy. These cases highlight the importance of early radiographic detection, individualized management, and long-term monitoring. Clinicians should carefully assess panoramic radiographs in mixed dentition to identify PEIR, particularly in less commonly affected teeth, and tailor treatment according to lesion activity and anatomical considerations. (J Korean Dent Assoc 2025; 63(12): 399-405)