Figure 3 Clonogenic ability, cell proliferation and cell migration of the DPSCs and iDPSCs. (A) The clonogenic potential of DPSCs was significantly higher than that of iDPSCs judged from violet crystal staining. (B) The average colony formation efficiency was calculated from 5 samples. (C) DPSCs showed higher proliferation ability than iDPSCs from days 5 to 8 with CCK-8 test. * P<0.05. (D) The successful migration of DPSCs and iDPSCs showed similar migration potentials with crystal violet staining (magnification, ×20; scale bar, 100 μm); the bar graph represents the average migration rate analyzed from 5 samples. DPSCs – dental pulp stem cells; iDPSCs – inflammatory dental pulp stem cells. (Figure were created using Adobe Photoshop CS3, Adobe Systems Software Ireland, Ltd.).