What about ancient people's tooth decay?

In fact, modern medical equipment is very advanced, and tooth extraction and filling are completely painless, but why do people subconsciously think that tooth extraction is horrible? It is probably the subjective consciousness left by human beings since ancient times, because once you have dental caries, you have to let it rot. The simple and quick way to treat toothache is to bite pepper granules with your teeth. When it's about to rot, pull it out As for what to insert, it depends on the material. Modern medical equipment can fill teeth without tooth extraction. An old friend has poor living conditions and high resistance, and basically does not brush his teeth, but the probability of getting dental caries is very low. The life expectancy of the ancients was very low, basically 40 years old, and all serious illnesses were G.