What Is Dental Pulp?

Endodontium: Endothelium is located in the pulp cavity inside the tooth. The shape of the pulp cavity is roughly similar to the shape of the dental body. The crown cavity has a larger pulp cavity, which is called the pulp chamber. The root cavity has a smaller pulp cavity. The pulp tissue mainly contains nerves, blood vessels, lymph and connective tissues, as well as odontoblast cells arranged around the periphery of the pulp, and its role is to make dentin. The dental pulp has different pathological changes due to the different effects of pathogenic stimuli and the body's resistance, which will clinically show a series of different symptoms and signs. After dental pulp hyperemia lasts for a long time, it turns into acute pulp inflammation.

Endodontium: Endothelium is located in the pulp cavity inside the tooth. The shape of the pulp cavity is roughly similar to the shape of the dental body. The crown cavity has a larger pulp cavity, which is called the pulp chamber. The root cavity has a smaller pulp cavity. The pulp tissue mainly contains nerves, blood vessels, lymph and connective tissues, as well as odontoblast cells arranged around the periphery of the pulp, and its role is to make dentin. The dental pulp has different pathological changes due to the different effects of pathogenic stimuli and the body's resistance, which will clinically show a series of different symptoms and signs. After dental pulp hyperemia lasts for a long time, it turns into acute pulp inflammation.

Chinese name

Dental pulp

Foreign name

endodontium

Location

In the pulp cavity inside the tooth

Shape

The shape is roughly similar to the shape of the tooth

Make up

Pulp chamber

Features

Dentin formation

Dental pulp structure

The pulp tissue mainly contains nerves, blood vessels, lymph and connective tissues, as well as odontoblast cells arranged around the periphery of the pulp, and its role is to make dentin. When there is caries or other lesions in a certain part of the crown, a layer of dentin can be formed on the inner wall of the corresponding pulp cavity, called repair dentin, to compensate the thickness of the crown of the part, which is the protective nature of the pulp. reaction.

The function of dental pulp tissue is to form dentin, which has the ability of nutrition, feeling and defense. Pulp nerves are particularly sensitive to external stimuli and can produce unbearable intense pain.

Dental pulp pathogenesis

The dental pulp has different pathological changes due to the different effects of pathogenic stimuli and the body's resistance, which will clinically show a series of different symptoms and signs.

After dental pulp is stimulated, the initial pathological manifestations are vasodilation and blood filling. If the source stimulus is removed in time, this simple hyperemia condition can be relieved and the pulp can be restored to its original state.

After dental pulp hyperemia lasts for a long time, it turns into acute pulp inflammation. If the bacteria that invade the dental pulp have low virulence and the body's resistance is strong, the inflammation of the dental pulp tissue is mostly a chronic process. If the exudate of acute inflammation is drained but the inflammation is not completely eliminated, it can also be converted into chronic inflammation. That is, chronic pulpitis, the most common type in clinical practice, clinical symptoms are not typical, and some cases may not have spontaneous pain. Conversely, if the body's resistance is reduced or local drainage is not smooth, chronic pulpitis will turn into acute pulpitis, that is, acute exacerbation of chronic pulpitis.

Because the pulp tissue is located in the hard and inelastic dental pulp cavity of the four walls, its blood circulation can only pass through the small apical foramen, and lack of collateral circulation. Once the endodontic inflammation occurs, the inflammation exudate is not easy to drain and the intramedullary pressure It rises quickly and produces severe pain.