It helps protect your mouth. Your top teeth help protect your cheeks, and your bottom teeth protect your tongue, making it much less likely to bite either. [Malocclusion](https://medlineplus.gov/ency/article/001058.htm) is what happens when they aren’t aligned like that.
It helps protect your mouth. Your top teeth help protect your cheeks, and your bottom teeth protect your tongue, making it much less likely to bite either. [Malocclusion](https://medlineplus.gov/ency/article/001058.htm) is what happens when they aren’t aligned like that.