So what's your mouth got to do with your heart?

Well, maybe a lot, according to studies showing people with gum disease are at increased risk of heart disease.

Why? One theory is that bacteria in infected gums travel in the bloodstream, causing inflammation in arteries including those around the heart. This can lead to a heart attack.

Treating gum infections can reduce inflammation and improve blood vessel function.

The best approach is to prevent gum infections by brushing and flossing twice a day, seeing a dentist regularly, and alerting him or her if you notice red or irritated gums.

Keeping your gums healthy is one more way to keep your heart healthy, and that should keep you smiling.