Today's teeth whitening treatments are so easy, convenient and affordable that they've become a regular part of everyone's beauty routine. If you haven't tried one yet, you'll be happy to know that you have plenty of choices. For the fastest, most dramatic results, consider in-office whitening. In-office whitening treatments take just an hour and can whiten teeth up to 10 shades. If you're the do-it-yourself type, an at-home teeth whitening kit might be right for you. These professional grade teeth whitening kits produce excellent results over a longer period of time. They can be purchased from your dentist or over-the-counter, but for best results, it's recommended that you always consult with a dentist before trying any over-the-counter teeth whitening system.