This Friday, October 7, is World Smile Day. This little-known holiday encourages people to do one act of kindness that will make someone else smile. A great idea! But if you are embarrassed by the look of your smile, the day could both motivate you to do good and leave you feeling self-conscious. Fortunately, cosmetic dental treatments can transform the appearance of your teeth and give you plenty of reasons to grin. Dr. Jason Cellars ...