The 'stratum intermedium' in a
developing tooth is a layer of two or three
cells between the
inner enamel epithelium and the newly forming cells of the
stellate reticulum. It first appears during the early bell stage of tooth development, at around the 14th week of intrauterine life. The stratum intermedium has a notably high
alkaline phosphatase activity. This layer, along with the inner enamel epithelium, is responsible for the
tooth enamel formation.
References
★ Cate, A.R. Ten. Oral Histology: development, structure, and function. 5th ed. 1998. ISBN 0-8151-2952-1.
BKB Berkovitz, GR Holland, BJMoxham. Oral Anatomy Histology and Embryology. 3rd edition. Mosby ISBN 0-7234-3181-7