To facilitate model acquisition.

It may be that the condition of the gums is not good, patients with gum hyperplasia or irregular gums need to cut the gums for aesthetic reasons.

The shape and structure of teeth

Each tooth is divided into three parts: crown, root and neck. The crown is the part exposed outside the gums, which is white and shiny; the root of the tooth is embedded in the alveolar and is firmly connected to the alveolar bone through the periodontal ligament. There is a hole at the tip of the root, called the apical foramen, through which the root canal connects to the alveolar bone. The crown cavity is connected.

There are blood vessels, nerves, and lymphatic vessels entering and exiting the tooth. The neck of the tooth is the slightly thinner part between the crown and the root of the tooth, and is surrounded by the gums. Periodontal ligament, alveolar bone and gums are collectively called periodontal tissue, which protect, fix and nourish teeth.

The structure of teeth is mainly composed of dentin, enamel, cementum and dental pulp. Dentin is dense and hard, making up the main body of the tooth and located inside the tooth. There is a layer of adhesive material (cementum) on the outside of the dentin at the root of the tooth, and there is white, shiny, hard enamel on the surface of the crown. Enamel has the highest degree of calcification and is the hardest tissue in the human body.

The crown cavity and root canal are collectively called the dental cavity. The dental cavity is filled with blood vessels, nerves, lymphatic vessels and connective tissue, called the dental pulp. Lactobacilli in the oral cavity can ferment sugars to produce acid, leading to decalcification of the enamel and the formation of cavities, which is clinically known as dental caries. If the cavity continues to deepen and affects the nerve of the tooth pulp, it can cause severe pain.

Reference for the above content? Baidu Encyclopedia-Ya