Biopsy at 20 days after surgery: the histological aspect of the iliac bone graft reveals osteocyte lacunae full of vital osteocytes, which represent a sign of the grafted bone's rapid revascularization. (A) Lamellar-type cortical bone of the ilium that faces to maxillary antrum. (B) Cancellous part of the block graft with bone trabeculae and medullary spaces. (C) Bone grafted/maxillary alveolar ridge interface (original magnification ×100). At a higher magnification (×200), a newly formed trabeculae bone bond with ordinal trabeculae of the original maxillary bone due to osteoconduction is clearly noted.