Fig. 4From: Indirect 3D printing technology for the fabrication of customised β-TCP/chitosan scaffold with the shape of rabbit radial head—an in vitro studyAlkaline phosphatase (ALP) staining. The existence of ALP was tested in early osteogenic differentiation of MSCs in the presence of the scaffolds after 7 days using an ALP staining solution. Left: alkaline phosphatase stained after 7 days of incubation with MSCs. Right: control after 7 days in the same media without MSCs and stainedBack to article page