Nothing is more precious than your smile

By Dr. Stephanie McGann, DMD FAGD, Columnist, The Times There are many wise old sayings involving a smile.  Mother Teresa is credited with saying “We shall never know all the good a simple smile can do.”  A Chinese proverb suggests that every smile makes you a day younger.  It’s no wonder we show people how we feel with our smiles.  Today a simple smile has become big business for corporate...