Dental pulp and its histology

Dental Pulp

The soft connective tissue which is present inside the pulp cavity and supports the overlying dentin is called as pulp. It is characterized by the presence of nerve and blood vessels.

Pulp Cavity

The cavity which contains the pulp is known as pulp cavity. It is further divided into two on the basis of its location.

1. Pulp chamber

The portion of pulp cavity which is present inside the crown of the tooth. It contains the cronal pulp.

2. Root canal

The part of pulp cavity which is present in the root of the tooth is called root canal or root canal system in multirooted tooth. It contains the radicular pulp.

Histology of the Pulp

Histological examination of the pulp shows four distinct zones which are

1. The odontoblastic zone at the pulp periphery.

2. A cell-free zone of Weil beneath the odontoblasts which is prominent is the coronal pup

3. A cell-rich zone where cell density is high, as seen adjacent to the cell-free zone.

4. The pulp core which is characterized by the major vessels and nerve of the pulp.

Principal Cells of the Pulp

Cells which are present predominantly inside the pulp are

1. Odontoblasts are the most prominent cells in pulp.

2. Fibroblast are most numerous type of cells in pulp.

3.  Undifferentiated ectomesenchymal cells. 

4. Macrophages and other immunocompetent cells.

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Lecture notes by Dr.Bala

Lecture notes by Dr. Bala