众所周知，有一口洁白的牙齿易让人笑口常开和信心倍增。那么，如何才能够让您有一口洁白的牙齿呢？显然，日常保健非常重要，如正确而合理的刷牙及选择可以增白而不是抹黑牙齿的食物尤其重要，特别是上口腔诊所或在家美白牙齿后的人们更应注意食物的选择，以维持美白牙齿的效果。

专家们建议，经常食用坚硬的水果和蔬菜，如苹果、豆类、花菜、胡萝卜和芹菜等，因需要反复咀嚼而擦洗牙齿，进而有利于美白牙齿；另外，奶制品特别是高钙的奶制品、奶酪和乳酸饮料亦有利于美白牙齿。同样，人们应该自觉避免或过多食用烟草、酱油、软饮料、白或红酒和蓝莓等可以使牙齿着色的食品。另外，需要提醒的是“漂白剂虽然可以美白牙齿，但不宜过多使用，因为漂白剂使用过多可以使牙齿产生永久性损伤”。

Watch What You Eat After Teeth-Whitening, Expert Says

Blueberries, wine and soy sauce stain while cheese, firm fruits and veggies 'scrub'

SATURDAY, Nov. 19 (HealthDay News) -- Eating certain foods and avoiding others can help keep your teeth white after you've used an at-home whitening kit or had cosmetic bleaching, an expert says.

"For many individuals who have had good results with either dentist-directed or over-the-counter whitening techniques, a significant concern is how to keep the teeth white after bleaching," Dr. Raymond Garrison, professor and chairman of the Wake Forest Baptist Department of Dentistry, said in a Wake Forest Baptist Medical Center news release.

"We now know that there are foods that actually help to keep your teeth white rather than stain them. In fact, it may help patients avoid the time and expense of whitening retreatment."

Firm fruits and vegetables such as apples, green beans, cauliflower, carrots and celery help scrub teeth while you chew. They also help promote the flow of saliva, which neutralizes acids and protects teeth, Garrison said.

Dairy products, especially those high in calcium, and cheeses also help keep teeth white. The lactic acid in these products helps prevent decay. Harder cheeses also help remove food particles left on the teeth.

People should avoid or limit consumption of foods and other products that stain teeth, such as tobacco, soy sauce, soft drinks, red and white wine and blueberries.

While bleaching is an effective method for whitening teeth, it can cause short-term effects such as sensitivity. Too many whitening treatments can lead to permanent damage, such as erosion of tooth enamel.

Before you undergo bleaching or use teeth whitening kits, consult a dentist, Garrison advised.

SOURCE: Wake Forest Baptist Medical Center, news release, Nov. 11, 2011