Fig. 2

Clinical and radiographic images of case 2. a Panoramic view before extraction of #11, 12. A combined periodontic-endodontic lesion and root fracture of #11 were diagnosed (black arrow). b Blocks of Auto-FDT (root portion, black arrow) were inserted into extraction sockets. c At 26 months after socket preservation, regenerated bone showed good maintenance between implants in panoramic view (black arrow)