What are teeth made of?

Teeth are an important tissue in our body. The main component of teeth is alkaline calcium phosphate. We usually use fluoride toothpaste to help strengthen our teeth. Generally speaking, an adult has between 28 and 32 teeth. If a person has less than 20 teeth, it will affect the person's chewing function and gastrointestinal digestion, causing great harm to health.

Knowledge of teeth

Teeth are a structure found in many vertebrates. Generally speaking, teeth are white and hard. Teeth come in a variety of shapes for a variety of purposes, including tearing and grinding food. Some animals, especially carnivores, use their teeth as weapons of war. With the creation of human civilization, the pronunciation of various languages ​​has developed into a variety of languages.

The pronunciation of language is highly dependent on the cooperation of teeth, tongue and mouth, and is applied to speaking and singing in human life. The cleanliness of teeth is even related to social activities and status. Humans have two sets of teeth throughout their lives: deciduous teeth and permanent teeth. The pronunciation of human language is closely related to the upper and lower front teeth in the mouth. The standard language of the ancient Chinese is called "Ya Yan".

Function

In a person's life, teeth grow twice. The first teeth that grow are called "deciduous teeth", and all of them grow out by the age of two, totaling twenty teeth. Around the age of six, the deciduous teeth gradually fall out and the permanent teeth grow out, a total of thirty-two. According to their morphology, they can be divided into incisors (2), canines (1) and molars (5). The function of the incisors is to cut food, the bicuspids are used to mash food, and the molars are used to grind food.

Teeth not only help chew food and pronounce, but also have a great impact on the beauty of the face. Due to the support of teeth and alveolar bones, normal dental arch shape and occlusion, a person's face and lips and cheeks appear plump. When people talk and smile, neat and white teeth can better show their health and beauty. On the contrary, if the dental arch develops abnormally and the teeth are arranged disorderly and unevenly, the face will appear unharmonious. If too many teeth are missing, the lips and cheeks will lose support and become sunken, making the person's face look old and thin. Therefore, people often regard teeth as one of the important indicators of bodybuilding.