Tomes' process

Overview
Tomes' processes are a histologic landmark identified on an ameloblast. During the synthesis of enamel, the ameloblast moves away from the dentin, forming a projection surrounded by the developing enamel. Tomes' processes are those projections and give the ameloblast a "picket-fence" appearance under a microscope.

They are located on the secretory, basal, end of the ameloblast.