FIGURE 5.

Transmission electron micrographs (TEM) of early enamel development. TEM images of the mouse showing early enamel formation. A: ameloblast Tomes’ process (TP; right) surrounded by enamel crystallites seen adjacent to the dentino-enamel junction (DEJ; broken line) that is located diagonal to frame, and with pre-dentin (PD; unmineralized dentin) to the left. Scale = 1 µm. B: initial enamel crystallite formation for the first 1–1.5 µm (shown in panel). TP, PD, and DEJ (broken line) are also identified. Scale = 0.2 µm. C: this panel shows a higher magnification of the DEJ area very early in enamel crystallite formation. Scale = 200 nm.