Tooth enamel is the hardest substance in the human body. Enamel covers the part of the tooth that is visible above the gum line, forming a shield that protects it from daily use. Although it is very hard, enamel can erode, chip and crack. Damaged enamel leaves teeth unprotected, which increases the risk of infection and can lead to cavities and sensitivity. Because it has no living cells, your body cannot regenerate enamel once it's gone. 

Here are five ways to protect your enamel:

• Wait an hour after consuming sodas, citrus fruits and juices before brushing your teeth. These acidic foods and drinks soften enamel, making it prone to damage from your toothbrush. 
• Use a straw for acidic drinks and rinse your mouth with water after consumption.
• Finish meals with a glass of milk or a piece of cheese to cancel out acids.
• Chew sugar-free gum between meals to boost saliva production, which helps strengthen teeth.
• Brush teeth gently with a soft toothbrush and fluoride toothpaste two times each day, and floss and rinse with a fluoride mouthwash daily.

Since enamel can't grow back, preserving it is important. Protect your enamel to maintain strong teeth for a healthy smile.