question: I had a cavity under the gum line of upper rear molar.  Very hard to reach.  Drilling was quick but due to gum bleeding and saliva duct, dentist and assistant took nearly an hour to fill the cavity.  After multiple attempts, dentist cauterized the gum to stop the bleeding.  Filling finally held.  Now after a week to heal, the gum does not appear to be growing back, and in fact, has a large enough gap that I can feel the root of the molar with my tongue.  Is this permanent or do I need to give it time to close around the tooth?