At Rovi Smile Center, our in-office teeth whitening is a breeze—it involves applying a special peroxide gel to your teeth and activating it with light for about an hour, lightening your smile up to 8 shades brighter. We also offer take-home kits for convenience. It's safe for most folks and lasts 1-3 years, with just mild gum irritation as a possible short-term side effect.