Revive Dental offers teeth whitening to patients. Over the years, your teeth will change color get both intrinsic and extrinsic staining. Discolored teeth can make your smile look aged and unattractive. Teeth become discolored and look yellow, brown, or a grayish color. With all the elements our teeth are exposed to when we eat and drink; it is no wonder some of us need teeth whitening to reverse discoloration.