Figure 5.

Histological findings of dentin block grafts into the skeletal sites [63]. (A) Macropores (300 µm, red arrow) on the dentin block that penetrated from the surface to the pulp space provided the space for vascular invasion. (B) At 8 months after the graft, the macropores (300 µm, black line) were filled with newly formed osteoids with embedded active chondrocyte-like cells (red arrow) that closely contacted the inner wall of the macropore. (C) At 3 months after the graft, a newly formed osteoid, which had osteocytes (black arrow) and vessels (black asterisk), had been deposited on the dentin block surface. Cellular fusion without fibrous tissue invasion was observed on the border between the osteoid and the dentin matrix (black arrowhead).