When looking to get white teeth, cosmetic dentistry is a great option. A cosmetic dentist can do laser whitening to make yellow, stained teeth white. This can be done within one to a few visits to a dentist. A cosmetic dentist is a dentist that has been through more extensive training and can do things to make the smile look more beautiful. A natural way to whiten teeth is with the use of fresh strawberries. Strawberries have a natural whitening agent in them. Just crush up a few fresh strawberries in a bowl and mix with about a teaspoon of baking soda, and brush the teeth with the mixture.