Products and procedures that bring a gleam back to aging teeth are literally white-hot these days, with everyone seeking that perfect Julia Roberts smile. But what works best?In many cases, experts say, that may depend on how much you want to pay."For the brightest smile, quickest, you’d want power bleaching in your dentist’s office, and you’d back that up with tray bleaching at home,” said Dr. Jeff Morley, a San Francisco cosmetic dentist and spokesman for the American Dental Association.
