Callus Formation in Fractured Femur of Rats Treated with Injection of Human Umbilical Cord Mesenchymal Stem Cell-Conditioned Medium

Figure 1

Radiographic images of rats femur bone in control and MSC-CM groups on days 1–60 after surgery. The yellow arrow indicates the gap fracture area of the bone. The callus formed around the gap fracture area is more radiolucent than the compact bone.