Figure 2. In vitro development of re-associations between dental mesenchyme and dissociated epithelial cells from first lower molars at ED13. The re-associations were cultured for 12 hrs (A), 24 hrs (B), 2 days (C), 4 days (D), 6 days (E), and 14 days (F). DE, dental epithelium; DM, dental mesenchyme; DP, dental papilla. Bar = 40 µm.