Different endodontic treatments induced root development of two nonvital immature teeth in the same patient: A case report

Figure 4 Follow-up of the right maxillary second premolar. A: 3-mo follow-up. The hypodense area around the root apex was significantly diminished, and the apex was obviously closed (white arrow); B: 6-mo follow-up. There was complete healing of the periapical hypodense area (white arrow). The thickness of the dentinal wall was slightly increased, and there seemed to be some scattered calcifications in the root canal (black arrow); C: 12-mo follow-up. The root canal was obviously narrowed, and the thickness of the dentinal wall was increased significantly (black arrow).