Dogs have a total of forty-two permanent teeth. Among them, there are four molars on the left and right sides of the dog's mouth. Next to these molars are white teeth. Among them, there are two white teeth on the mountain jaw. There are three white teeth on the lower jaw, then there are two canine teeth at the top and bottom, and then there are six incisors at the top and bottom, for a total of forty-two teeth.

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From the dog's tooth structure, we can see that it can not only tear food, but also chew it, which is why it can become a chore animal.