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    From a mere cleaning to tooth whitening to "smile design," a trip to the dentist can be a cosmetic experience these days.

    Make Over Your Mouth

    'Smile Design'

    Tooth whitening can be just the beginning. If you want to get serious, you can have your teeth and gums overhauled completely. "Smile design" is what San Francisco cosmetic dentist Jerry Bellen calls it.

    "Smile design is looking at the positions of somebody's teeth, and how the teeth are framed by the lips," he says.

    For example, if your gums show too much when you smile, that can be fixed. "We do what's called a gum lift," Bellen says. "The technical term for it is crown lengthening."

    This is a surgery that can be done in the dentist's office, whereby the gums are pushed up so that more of the teeth show. "Surprisingly, there isn't much pain," Bellen says. "It's a fairly minor surgery."

    You can also have your teeth shaped any way you want them to be. Bellen says that lengthening and rounding the edges of your front teeth can actually make you look younger. A lifetime of chewing (and especially of nail biting) wears down your teeth. Even after a facelift, worn teeth can add years to your appearance.

    To shape a tooth, a cosmetic dentist may bond a resin or porcelain veneer or crown to it. Resin bonding is the older method. "It still is good and used a lot today," Malone says, but it doesn't last as long as porcelain, the newer material.

    Resin may, in time, wear out or become discolored, whereas porcelain doesn't. The other difference is that resin bonding is done in the dentist's chair. For a porcelain veneer, a mold is sent away to a dental lab to be made, then bonded on later.

    In addition to shaping teeth attractively, a cosmetic dentist can give you pouty lips. "We take profile photographs of the lips," Bellen says, "If somebody wants a fuller lip, we can actually increase the bulkiness of the veneer," so that it pushes the lip outward.

    Tetracycline stains can also be covered with veneers. "When tetracycline [a commonly used antibiotic] is given as a child, it tends to stain developing teeth," Bellen says. "It happens in bands -- striations across the teeth."

    If your molars are a mess of metal fillings, that can be fixed by grinding them down and capping them with new porcelain crowns.

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