The Power Course

Which of the following acts as a reservoir of cells in enamel organ:


1 ) Enamel niche
2 ) Enamel knot
3 ) Enamel cord
4 ) Enamel septum


Enamel knot:

These are localized condensation of cells seen in the region of the inner enamel epithelium and the center of the enamel organ. this means these are the thickened proliferation of cells seen in between stellate reticulum. It is a transitory or a temporary structure that appears during the bell stage of tooth development. Enamel knot functionally is known to be a reservoir of diving cells and is similar to the stratum basale of oral epithelium. It disappears in the bell stage by apoptosis. 

Enamel cord:

These are the strand of cells that connect the central portion of the enamel organ and are directed towards the outer enamel epithelium. The major function of this cord is to guide the direction of tooth eruption. It is also a transitory structure of enamel organ. 

Enamel septum:

As the enamel cord is directed upwards from the center of the enamel organ, it seems to divide this organ into two parts hence referred to as enamel septum. It is also a transitory structure and seen during the bell stage. 

Enamel niche: 

It is a structure consisting of mesenchymal cells that look to be surrounded by the strands of the dental lamina. They appear due to funnel-shaped depression in the dental lamina and when the slide is taken in one plane.


Enamel knot, enamel cord, enamel navel, enamel septum are all transitory structures of the enamel organ and all are seen during the bell stage of tooth development. 


Enamel knot

Further Reading


Last Modified : 08-Dec-2019

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