If there’s one accessory that goes with absolutely any outfit, it’s a gorgeously white smile. However, teeth can develop unsightly stains and discoloration due to years of exposure to richly colored items like coffee, tea, red wine, cola, berries, and dark sauces. Dental stains can be especially frustrating if you have a special event such as a graduation or a wedding coming up, but your dentist can address this issue with an in-office teeth whitening treatment. Here’s a guide to how the process works and how long it takes.