and the dental papilla. At this time, the dentin is not mineralized. The IEE appear as cuboidal or low columnar cells with centralized nuclei and poorly developed Golgi complexes.

The differentiation phase of the Induction stage is initiated by the presence of newly formed predentin. The IEE cells then elongate and become preameloblasts. There is a shift in polarity. Each preameloblast elongates and becomes an postmitotic, polarized, secretory ameloblast. However,