Whitening Nite White™ the popular 2-hour whitening technique that was recently featured on the hit tv show Extreme Makeover™. Brite Smile™ is another option to whiten your teeth in a little over an hour. It was the original and most researched 1-hour technique. Click on the topic you wish to view: • What is tooth whitening? • Why can only a dentist get my teeth their whitest? • What causes tooth discoloration? • Who may benefit from tooth whitening? • Can I bleach while I'm pregnant or lactating? • Why aren't my teeth whitening evenly? • Is the process safe? • How much does bleaching usually cost?