I believe that friends who like watching Japanese movies will find that many handsome guys and beautiful women in Japan have crooked teeth, and one mouth instantly reduces the whole person's sense of compulsion. This kind of irregular teeth is not uncommon. In fact, most Japanese people have irregular teeth. Why on earth is this?

First of all, because the cost of orthodontics in Japan is particularly expensive, it is not included in social security. Therefore, Japanese people often need 6.5438+0 million yen to correct their teeth, which is about 60,000 yuan. This is not a small sum for ordinary Japanese. In addition, there are differences in the cultural customs of different ethnic groups. The ugly messy teeth in our eyes are lovely symbols in the eyes of the Japanese. Therefore, most Japanese people don't mind their teeth being uneven. Secondly, because Japanese skulls are smaller than those of other nationalities.

Although the Japanese mandible has small bones, there are many teeth, so that the same teeth grow in a narrow environment and are squeezed for a long time, which leads to irregular tooth growth. What we call "wisdom teeth" today is because the mandible of modern people is much shorter than that of ancient people.

Finally, because the food eaten in Japan before the rapid economic development was mostly soft, the Japanese at that time rarely ate meat or even bones. This makes Japanese teeth, like a knife rusted in a sheath, unable to function regardless of the quality of the texture, which leads to the Japanese teeth growing at will without exercise and control, and eventually the teeth will be particularly prone to grow crooked.