Ameloblast
Pronunciation: ah-MEL-oh-blast
A specialized epithelial cell responsible for secreting enamel matrix proteins during tooth development.
Full Definition
Ameloblasts are ectodermally derived cells of the inner enamel epithelium that produce and mineralise dental enamel. They are active only during tooth development and are lost prior to tooth eruption, meaning enamel cannot be regenerated once formed. Editors working on dental histology or pediatric dentistry texts must distinguish ameloblasts from odontoblasts, which form dentine. The term is frequently encountered in articles on developmental anomalies, enamel defects, and ameloblastoma pathology.
Usage
Usage note: Do not confuse with 'ameloblastoma', which is a tumour of ameloblast-origin; the cell type and the neoplasm require careful distinction in pathology manuscripts.
In Context
- "The ameloblast layer retreats as enamel mineralisation approaches completion, leaving no cellular mechanism for post-eruptive enamel repair." — Dental histology textbook chapter
- "Disruption of ameloblast function during the secretory phase results in hypoplastic enamel defects visible on clinical examination." — Pediatric dentistry case report