The middle of the teeth is not empty.

Viewed from the outside, the entire tooth consists of three parts: crown, root and neck. The part that can usually be seen in the mouth is the crown, which is the main part that performs the chewing function. Its shape varies depending on its function. The tooth root is fixed in the alveolar socket and is the supporting part of the tooth. There are single-rooted teeth and multi-rooted teeth. The junction between the crown and the root of the tooth is called the neck.

If you cut the tooth longitudinally and observe it, you can see that the tooth is composed of three layers of hard tissue: enamel (commonly known as enamel), dentin and cementum, as well as the innermost soft tissue of the dental pulp.

The periodontal tissue surrounding the root and neck of the tooth is composed of three parts: periodontal ligament, alveolar bone and gums (commonly known as dental pulp). Its main functions are support, fixation and nutrition. teeth.

The nerves and blood vessels of the dental pulp are connected to the nerves and blood vessels of the alveolar bone and periodontal ligament through the apical foramen.

Nutrients are supplied to the dental pulp through the blood and nourish the teeth, so the teeth and periodontal tissue are inseparable