Representative sections of H&E stain (A, C and E) revealed the osteogenesis among the defects.

<p>New bone was visible in the area adjacent to the old bone and implanted scaffolds. Representative sections of Masson trichrome stain (B, D and F) revealed the compound of collagen in the osteogenic active zone. Bar: 200 µm. R: Root, F = Fibroblasts, NB = New bone, OB = Old bone, M = Material.