Figure 9.

Histological analyses of ameloblasts from 8-week-old WT (A–E) and KI incisors (F–J), as a function of stages of enamel development. A and F, presecretory; B and G, early secretory; C and H, mid-secretory; D and I, late secretory; E and J, maturation. C (inset, scale bar: 10 μm) shows the presence of Tomes' processes in WT ameloblasts at higher magnification. AB, ameloblasts; DE, dentin; EN, enamel; OD, odontoblasts; P, pulp; PAB, pre-ameloblast; PL, papillary layer; SI, stratum intermedium; arrowheads, Tomes' processes; asterisks (*), SA.