Three-Dimensional-Printed Poly-L-Lactic Acid Scaffolds with Different Pore Sizes Influence Periosteal Distraction Osteogenesis of a Rabbit Skull

Figure 7

Histology examinations of the regenerated bone. (a) Hematoxylin and eosin (H&E) staining of specimens (NB: new bone; CB: cortical bone; BM: bone marrow. The blue line represents the boundary between the NB and the CB). (b) Bone height was measured by H&E staining (, ). (c) Osteocalcin (OCN) expression by immunohistochemistry (IHC) staining. (d) The mean density of OCN (%) was quantified. (, , and ). (e) CD31 expression by IHC staining. (f) The mean density of CD31 (%) was quantified (, , ).