a: third (P3) and fourth (P4) left mandibular premolar (preoperative view),
b: mesial socket after extraction (MS), interadicular septum resection (SR), distal socket preparation (DS) in P3 and mesial bone defect (MS + SR) probing in P4,
c: implants (ITI) placed in distal socket of P3 before filling with IBS and IBS injection in mesial bone defect of P4,
d: 2 implants placed in distal sockets and non-overpacked fill with IBS,
e: overlapping flap sutures.