Teeth of various shapes are suitable for various purposes, including tearing and grinding food. Some animals, especially carnivores, use teeth as fighting weapons;
With the establishment of human civilization, the pronunciation of various languages has also developed diversified. Language pronunciation depends very much on the coordination of teeth, tongue and mouth, and is applied to speaking and singing in human life;
The regularity of teeth is even related to social activities and status. There are always two pairs of teeth in a person's life: primary teeth and permanent teeth. The pronunciation of human language is closely related to the upper and lower teeth in the front row of the mouth. The standard language of the ancient Han nationality was "Yayan".
Usually people regard white teeth as healthy teeth and a symbol of beauty. Many people will deliberately bleach their teeth in dental clinics and hospitals, or ask doctors to coat their teeth with a "white film";
In fact, the truly healthy and beautiful teeth are not white as most people think, but pale yellow;
Because the tooth surface is covered with a layer of enamel, it is transparent or translucent, and its deep layer is dentin, which is light yellow. The color of teeth is related to the degree of calcification of enamel. The higher the degree of calcification, the more transparent the enamel is, and the true color of deep dentin makes the teeth pale yellow through it. On the contrary, the teeth will appear abnormal white or milky white;
Therefore, the yellowish teeth indicate that your enamel has a high degree of calcification, which is a healthy performance. On the contrary, because the teeth with dysplasia and calcification are mostly white, chalk spots will also appear on the teeth with early caries due to demineralization.