Development of Tooth - Part 3 : Root Formation of Tooth

#rootformationoftooth
The development of the root begins at late Bell stage. The HERS grows coronal to the epithelial diaphragm and causes the differentiation of the nearby dental papilla cells into pre-odontoblasts and then finally to odontoblasts.
These odontoblasts will lay down the dentinal matrix and will cause the root sheath to disintegrate but the remnants of the root sheath persists there and are called epithelial rests of Malassez.
soon after the root sheath disintegrates the barrier between the dentin and the dental follicular cells is removed and will lead to the differentiation of the dental follicular cells into fibroblasts, cementoblasts and osteoblasts.

Video (diagrams+editing) & Voiceover:
Dr.Maryam Kazman

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watch the bud and cap stages here :    • Development of Tooth - Part 1: Initia...  

watch the bell stage here :    • Development of Tooth - Part 2 : Early...  

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