What Happens If You Brush Your Teeth Three Times a Day?
What is the story behind What Happens If You Brush Your Teeth Three Times a Day? Read our comprehensive breakdown in this feature article.
Tooth enamel is the hardest tissue in the body. Problem is, it's not living tissue, so it can't be naturally regenerated. Unfortunately, you can't regrow it artificially, either -- not even with those special toothpastes.