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In vitro development of re‐aggregated Ep‐Me cells from p4 at secretory stage. (A), The dissociated epithelium and mesenchyme of p4 (E70, left), Ep‐Me bioengineered tooth germ in vitro culture at 3rd day (middle) and 8th day (right), Scale bar = 500 μm. (B), Morphogenesis and interaction between epithelial cells (red) and mesenchymal cells (green), Scale bar = 100 μm
