Hi everyone,\nI found this forum because I have a bit of an issue.\n \nI just got back from my dentist and it turns out I have what he referred to as a "shadow under my filling". Now, I should've asked him some questions that I didn't at the time but I'm not sure which tooth he is referring to but I have [URL='http://imgur.com/KaYXiWV']X-Rays [/URL]:D but I don't know what I'm looking at though. I have what I believe to be good oral hygeine, I brush twice a day and floss atleast once a day.\n \nIs this shadow common? What can cause this? Could he have screwed up when he put in my filling? He kept referring to something as "M.O.D." but I forgot to ask him what that was, could someone enlighten me?\nHope to hear something soon.\nThanks.