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

Figure 5 Follow-up of the right mandibular second premolar. A: 3-mo follow-up. The hypodense area around the root apex was significantly diminished (white arrow); B: 6-mo follow-up. The periapical hypodense area was completely healed (white arrow); C: 12-mo follow-up. The periodontal ligament was narrowed (white arrow). Complete closure of the apex was observed, and there was an obvious calcification layer generated just around the apical barrier materials (black arrow).