Teeth Whitening Who doesn't like a bright smile? An assortment of teeth-whitening systems is available, including toothpastes, over-the-counter gels, strips and trays, and whitening agents obtained from a dentist. But whitening isn't for everyone. It's ideal for people who have healthy, unrestored teeth and gums. Individuals with yellow tones to their teeth respond best. Talk to your dentist to find out if whitening is right for you.