Do you know what the strongest substance in your body is? You may be surprised to learn it is your tooth enamel, which is the outer covering of your teeth. Your tooth enamel is even harder than your bones. The enamel of your teeth protects the dentin, which is found inside your teeth. Tooth enamel also helps protect your teeth from daily use, including chewing and biting. Although tooth enamel is strong, it is not indestructible and can become damaged when you don’t care for your teeth properly.