Answer:
Brush, floss, eat right and take a couple of extra nutrients, including CoQ10, Calcium, Vitamin D and Vitamin C. But be sure to avoid fizzy supplements. They lower the pH in your mouth and erode your tooth enamel.
Get more details on how these supplements can help by reading this article http://www.chargeupforgoodhealth.com/blog/supplements_for_strong_teeth/index.html