Tooth enamel is the hardest substance in the human body, but, until now, no one knew how it managed to last a lifetime. The authors of a recent study conclude that enamel's secret lies in the imperfect alignment of crystals.

Xylitol is a lower-calorie sugar substitute with a low glycemic index. Some research suggests that it may also improve dental health, prevent ear infections, and possess antioxidant properties.

Gum disease is common and unpleasant, but, according to a growing body of evidence, it could also play a role in a surprising range of seemingly unrelated health problems.

There are several possible causes for white spots on teeth, including dental fluorosis, enamel hypoplasia, poor dental hygiene, and eating too many acidic or sugary foods.

Teeth are an important part of physical appearance for many people, and they want to show a bright white smile. However, a new study reveals that many tooth whitening products can damage the teeth.