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

Figure 1 Preoperative photos of the right maxillary second premolar and the right mandibular second premolar. A: Preoperative intraoral photo of the right maxillary second premolar. Note that the central cusp deformity had been polished during the patient’s last visit in another clinic, and a residual part was still visible (white arrow); B: Preoperative periapical radiograph of the right maxillary second premolar. Note that the apex of the root is open (white arrow), the root canal is wide, the dentinal wall is relatively thin (black arrow), and there is a hypodense area around the root apex; C: Preoperative periapical radiograph of the right mandibular second premolar. Note that the apex of the root is not closed (white arrow), the root canal is wide, the dentinal wall is thin (black arrow), and there is a hypodense area around the root apex.