Being epithelial in origin, enamel formation differs in many respects from that associated with the other mineralized dental tissues. When initially formed, young enamel is only lightly mineralized (about 20–30%) and contains a high proportion of unique enamel proteins. However, it subsequently undergoes a process of maturation whereby its very high level of mineral content (96%) is attained and excess enamel proteins and water are removed. The more complicated pattern of development of enamel is reflected in the changing morphology of the ameloblast during development.