Dentist is called dentist for short, and the treatment department is stomatology. We can find some rough-filled teeth and ancient dentures from the skulls of early humans. A wooden board found in an ancient tomb built in 3000 BC in Egypt is painted with "Heisili", that is, doctor, dentist or "dentist".

/kloc-In 0/400, Henry IV of England appointed Flint as "London Tooth Puller" to treat people with dental problems and gave him sixpence as a reward every day. Tooth extraction is a very painful thing. Sometimes, tooth extraction is still a punishment and the executioner's job.

Teeth:

Tooth is a structure that exists in many vertebrates. Teeth are the hardest organs in the human body. There are two pairs of natural teeth in a person's life, one is deciduous teeth and the other is permanent teeth. When deciduous teeth fall out, permanent teeth grow out. Permanent teeth cannot regenerate after falling off.

With the progress and development of social science and technology, denture has become the third pair of human teeth. In daily life, people talk loudly and chew food through the cooperation of teeth. At the same time, the health and beauty of teeth are closely related to people's daily life.

Each tooth is divided into crown, root and neck. The crown is the part exposed outside the gum, white and shiny; The root of the tooth is embedded in the alveolar bone and firmly connected with the alveolar bone through periodontal ligament. There is a hole in the apical part of a tooth, which is called apical foramen. It is connected with the cavity of dental crown through root canal, which contains blood vessels, nerves and lymphatic vessels. The neck of a tooth is a slightly thinner part between the crown and the root, which is covered with gums. Periodontal membrane, alveolar bone and gum are collectively called periodontal tissues, which have protective, fixing and nutritional effects on teeth.