I had a tooth decayed and then had root canal down. After I had a permanent crown, I did not think the dentist did a very good job in installing the crown and there is a line (I can see it) between the gum and the crown. I noticed it always bleeds when I brush my teeth. Today I flossed it and found there was something disgusting between my crown and another tooth, and it smelt very bad. There is no pain though and my tooth is due to be cleaned in June. I am wondering whether I shall call to see my dentist or just leave it till my next dental appointment?