Figure 6From: Eggshells as natural calcium carbonate source in combination with hyaluronan as beneficial additives for bone graft materials, an in vitro studyImmunohistochemistry staining with osteocalcin on polystyrene. a) control culture, cell cultures treated with b) eggshell powder (ES), c) calcium carbonate (CC), d) hyaluronan (HA), e) hyaluronan + eggshell powder (HAES) as cell culture medium supplement.Back to article page