Why do humans brush their teeth every day, but their teeth are not as good as those of animals?

This is related to eating habits and genetic factors. There will always be such problems, such as why animals are so healthy without brushing their teeth, and why people have various problems when brushing their teeth every day. Why on earth? First of all, animals don't brush their teeth, but their teeth are not necessarily healthy. You see, the teeth of domestic pets, cats and dogs need to be cleaned, especially the teeth of mammals that have grown up in recent years are worn out. Secondly, we humans also have a lot of teeth that never brush but are still healthy, which is related to eating habits and genetic factors.

The following is a detailed description of human and animal dental problems. Humans: Since the primitive society, our living environment has been constantly changing, but the evolution of some organs can't keep up with the changes in the living environment, which has also become the root of some health problems. Teeth are one of them. We humans have two pairs of teeth in our life. One pair is deciduous teeth and the other is permanent teeth. When we are about 7 years old, permanent teeth will replace deciduous teeth and stay with us for life. In addition, the food we eat is becoming more and more exquisite and miscellaneous. Teeth become hotbeds of bacteria. Besides, we often open beer bottles with our teeth, eat melon seeds and bite hard things. This is a kind of wear and tear on teeth. If you don't pay attention to oral hygiene in this situation, who do you think can solve the oral problem?

Animals: Compared with humans, animals have a relatively simple diet. Some carnivores usually eat raw food and need big fangs to bite their food. In addition, fangs are small in shape, large in size and larger in spacing than humans. It is not easy to leave food, dental plaque and other microorganisms that damage teeth. Some animals have tusks all their lives. In addition to the teeth they use, there are several rows of spare teeth (sharks) hidden in their gums. Crocodiles and elephants may not be so exaggerated, but they are all based on this principle. Like mice and squirrels, their teeth keep growing, so they will grind off the loose and fragile dentin that has been used for a long time and always use new dentin, no matter how they grind their teeth.

In addition, some herbivores eat high-fiber plants, even if they are stuffed in their teeth, bacteria are difficult to decompose and absorb, and fiber itself has the function of cleaning teeth. In addition, not all animals eat by teeth. Some birds of prey tear food with their sharp beaks and claws and swallow it. The mouthparts of insects are usually tubular and are used to suck plant juice or blood of host animals. However, compared with wild animals, raised animals are prone to oral diseases, because eating cooked food with their owners for a long time is likely to suffer from various dental diseases. Finally, although animals have some natural advantages, they can't avoid some oral problems. Humans don't have so many advantages as animals. They can only change their daily habits and take good care of their teeth.