The organic matrix of dental enamel is produced by morphologically characteristic cells of the enamel organ (ameloblasts), which are derived from the stratified epithelial cells of the primitive oral cavity (1). On the basis of its ectodermal origin, as well as its chemical composition, physical properties, and histochemical staining characteristics, the protein component of the organic matrix,...

Tooth amelogenesis is a complex process beginning with enamel organ cell differentiation and enamel matrix secretion, transitioning through changes in ameloblast polarity, cytoskeletal, and matrix organization, that affects crucial biomineralization events such as mineral nucleation, enamel crystal growth, and enamel prism organization. Here we have harvested the enamel organ including the plia...

Slc4a4-null mice are a model of proximal renal tubular acidosis (pRTA). Slc4a4 encodes the electrogenic sodium base transporter NBCe1 that is involved in transcellular base transport and pH regulation during amelogenesis. Patients with mutations in the SLC4A4 gene and Slc4a4-null mice present with dysplastic enamel, amongst other pathologies. Loss of NBCe1 function leads to local abnormalities ...

Developing incisal enamel of the rat has been examined in sections with the electron microscope. Staining the sections with heavy metal and sandwiching them has revealed details hitherto unvisualized because of low contrast and destruction by the electron beam. In particular, it is seen that the cell membrane always lies between the ameloblast and the enamel and therefore that enamel is extrace...