Our teeth are extremely durable, but only if we take care of them, i.e. brushing our teeth and flossing frequently.

For some, their teeth last a lifetime, while others need to have some of theme replaced with dental prosthetics or entire dentures.

Some wear braces, especially during adolescence, most often because they have naturally crooked teeth. Models and actors often have their teeth trimmed or replaced with prosthetic ones in order to provide them with a completely symmetrical smile.

Keynotes about teeth look into this topic.