C3-PLZF cell injection leads to bone formation in an osteoarticular defect model in immunocompetent mice. (A) Quantification of the bone density (g/cm3). (B) Histologic analysis of tibial sections stained with Safranin O and Fast green. On the top, a representative control tibia. (C) Goldner trichrome histologic staining. Tibias were recovered 28 days later.