20 Things That Can Ruin Your Smile

Bottled water

Tap water often contains fluoride—about 60 percent of people in the U.S. have fluoride in their water supply.

However, most bottled waters contain less fluoride than recommended for good oral health (it will be listed as an ingredient on the label if it is an additive).

"Fluoride makes the entire tooth structure more resistant to decay and promotes remineralization, which aids in repairing early decay before damage is even visible," explains Academy of General Dentistry spokesperson, Charles H. Perle, DMD, FAGD. "Studies have confirmed that the most effective source of fluoride is water fluoridation."

Tobacco

Smoking turns your teeth yellow, but it can be much more damaging than that.

"Using any form of tobacco can harm your teeth and gums in a number of ways," says Halpern.

"It can cause throat, lung, and mouth cancer, and even death. Additionally, the tar from tobacco forms a sticky film on teeth, which harbors bacteria that promote acid production and create irritating toxins, both of which cause gum inflammation, tooth decay, and loss."

Pregnancy

It's especially important to take care of your teeth and gums when you're expecting, since studies show a link between untreated gum disease and pre-term and low-birth-weight babies.

"Changes in hormone levels during pregnancy, particularly surges in estrogen and progesterone, can cause inflammation of the gums, which can lead to gingivitis (red, swollen, tender gums that are more likely to bleed) and put you at risk for infection," says Academy of General Dentistry spokesperson, Gigi Meinecke, DDS, FAGD.

If you have morning sickness, rinse your mouth with water or rub your teeth with a paste of baking soda and water to neutralize the acid caused by vomiting, since it can lead to tooth decay.

Dieting

Restrictive diets and poor eating habits can deprive you of the vitamins and nutrients necessary for a beautiful smile.

It's especially important to get enough folate, B vitamins, protein, calcium, and vitamin C—all of which are considered essential for healthy teeth and gums.

"Poor nutrition can affect your entire immune system, increasing your susceptibility to many disorders and infections, including periodontal disease," says Halpern.

Hot drinks

Your hot-drink habit may be one reason your teeth look a little dingy.

"Black tea and coffee contain stain-promoting tannins that lodge into the pits and grooves of the tooth enamel, producing a rough, stained surface, which is sticky and can retain decay-producing bacteria," says Halpern.

Consume such beverages in moderation, drink more water every day, and add milk to your coffee or tea to help neutralize the acids, says Perle.

Brushing at the wrong time

Although we've been taught to brush after every meal, depending on what you eat or drink, that's not always the best advice.

"After consuming high-acid food or drinks, like wine, coffee, citrus fruits, and soft drinks, rinse with water to neutralize the acids, but wait an hour before reaching for the toothpaste," says Meinecke.

"Brushing teeth immediately after drinking carbonated drinks and acidic foods can cause erosion."

Overzealous whitening

It is not clear whether bleaching erodes tooth enamel, but it can increase sensitivity, especially when done too often.

Even at-home whitening treatments should be used with moderation, as some whitening toothpastes and gels contain abrasive ingredients that can increase tooth sensitivity, which can be painful.

Plus, as you get older, whitening products can only do so much, so after a certain point, using more won't necessarily do anything for your smile.

Citrus and acidic food

"Although lemons, grapefruits, and citrus juices don't directly cause cavities, like soft drinks, they contain acids, which cause erosion of the tooth enamel, weakening the tooth and making it prone to decay," says Meinecke.

Waiting to brush, rinsing your mouth with water, or chewing sugar-free gum can help. In particular, consider xylitol, a natural sweetener found in plants and fruits that was FDA approved as a food additive in 1986.

Found in sugar-free gum, mints, and toothpastes, xylitol can inhibit the cavity-causing oral bacteria. "Dentists will often recommend patients chew at least two pieces per day if they are at high risk for developing cavities," explains Meinecke.