Enamel tufts are:
a- Extensions of odontoblasts in the DEJ.
b- Enamel rods change their direction.
C- Enamel rods get crowded***
Arrange the steps [ca(oh)2 placing –varnish-base –amalgam.
An odontoblast is a mesenchymal cell.
Odontoblasts are responsible for the formation of dentin. They are located on the periphery of the dental pulp.
Embryologically, the odontoblasts derive from the periphery of the dental papilla, an ectomesenchymatous tissue (itself initially a mesenchymal tissue that has undergone transformations of the neural ridges of the mesencephalon and rhombencephalon).
Following a last mitosis, the cells located at the periphery of the dental papilla will divide into a rather internal part and a rather external part (near the basal lamina).
The more internal cells will form the Hohl cells.
The more external will capture growth factors emitted by the pre-ameloblasts on the other side of the basal lamina.
These peripheral cells will thus differentiate into pre-odontoblasts and then odontoblasts with polarization of the nucleus (odontoblasts become cylindrical), cell growth, basal differentiation (odontoblastic extension) and so on.
The odontoblasts are located on the periphery of the pulp, just at the edge with the dentine.
These are the hinge cells of the dentin-pulp complex.
Each odontoblast is provided with an odontoblastic extension, within a dentinal canaliculus.
It is probably these extensions that are responsible for the sensitivity of the dentin to variations in temperature and humidity.
Odontoblasts are able to mineralize their environment, but not to divide.
a- Extensions of odontoblasts in the DEJ.
b- Enamel rods change their direction.
C- Enamel rods get crowded***
Arrange the steps [ca(oh)2 placing –varnish-base –amalgam.
An odontoblast is a mesenchymal cell.
Odontoblasts are responsible for the formation of dentin. They are located on the periphery of the dental pulp.
Embryologically, the odontoblasts derive from the periphery of the dental papilla, an ectomesenchymatous tissue (itself initially a mesenchymal tissue that has undergone transformations of the neural ridges of the mesencephalon and rhombencephalon).
Following a last mitosis, the cells located at the periphery of the dental papilla will divide into a rather internal part and a rather external part (near the basal lamina).
The more internal cells will form the Hohl cells.
The more external will capture growth factors emitted by the pre-ameloblasts on the other side of the basal lamina.
These peripheral cells will thus differentiate into pre-odontoblasts and then odontoblasts with polarization of the nucleus (odontoblasts become cylindrical), cell growth, basal differentiation (odontoblastic extension) and so on.
The odontoblasts are located on the periphery of the pulp, just at the edge with the dentine.
These are the hinge cells of the dentin-pulp complex.
Each odontoblast is provided with an odontoblastic extension, within a dentinal canaliculus.
It is probably these extensions that are responsible for the sensitivity of the dentin to variations in temperature and humidity.
Odontoblasts are able to mineralize their environment, but not to divide.
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Community dentistry