FIGURE 3.

Secretory- and maturation-stage ameloblasts. A: highly polarized secretory ameloblasts (Am) with the Tomes’ process (TP) projecting into the forming enamel front. B: shorter maturation ameloblasts. Connective tissue (CT), outer enamel epithelium (OEE), stellate reticulum (Sr), stratum intermedium (Si), and papillary layer cells are also identified, as is the enamel (En) or enamel space (ES) region which is in contact with the distal/apical pole of ameloblasts. Blood vessels (BV) can also be seen in the folds of the papillary layer cells.