Figure 5From: Enhancement of periodontal tissue regeneration by transplantation of osteoprotegerin-engineered periodontal ligament stem cells In vitro adipogenesis of periodontal ligament stem cells. Cells grown in adipogenic media demonstrate the presence of fat vacuoles under a light microscope (A) and abundant fat vacuoles by Oil red O staining (B) after 6 weeks of culture. Magnification: 200 ×.Back to article page