标题：[分享][注意]A Little Secret Your Dentist Doesnt Want You To Know

Most dentist, particular those who specialize in cosmetic dentistry love it when you drink coffee & tea. Why? Your making them wealthy! Because all coffees and teas contain tannic acid. Tannic acid, the bitter compound in coffee and all forms of tea can cause yellow or brown stains when it combines with other particles on your teeth.

It's a multi-million dollar industry, from whitening toothpaste, home bleaching kits to laser whitening. If your teeth don't respond well to bleach or if your enamel is seriously damaged, they can offer you bonding. The dentist coats each tooth with a thin layer of resin that gets its natural-looking brightness from finely ground quartz. Sometimes the resin is removed, baked, and cemented back onto the tooth. Bonding can last eight years, but resin is prone to chipping and will stain just as normal teeth do. The procedure usually calls for only one office visit; the cost is up to $500 per tooth.

Porcelain veneers are another option for badly stained or chipped teeth. Your dentist etches each tooth's surface and then glues on a thin piece of porcelain. You get to choose the exact shade of white you want. Expect to pay up to $900 per tooth.

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