About 3 or 3.5 weeks ago I had a cavity filled in my top left molar. It had originally had a white filling which had loosened, and my dentist replaced it with an amalgam filling.
Since then, this tooth has been hurting me, causing pain to radiate from my tooth to my jaw. It is sensitive - but not overly so - to cold and heat. I went to my dentist and he took an x-ray this week and saw no sign of decay or abscess.
What could the problem be?