I had a history of malformation teeth, the dentist said it is a genetic disease, and it form a bubble in the tooth, and once the top of the bubble wear off, it become a shortcut to the root, and bacteria can infect the root and destroy the tooth.

I had multiple root canals done since I was 13, but there this one tooth that I just never bothered (I think is it #19). I knew there was infection there, but since it was contained and never give me problem, I let it alone.

This year, I finally have dental insurance, so I thought to have a check up after many years, my regular dentist suggested a roof canal and referred me to the endodontist. After a thorough exam, the endodontist said that there is infection in the tooth and an abscess in the bone near the root, and he said the root canal treatment will take care of the infection in the tooth, and the abscess will heal overtime.

So fine, I had the roof canal done, he put in some medication in the canal and scheduled me to do the permanent filling after 6 weeks. Two days later, my gum start to turn red and swell up quickly near the root. When I touched my the swelled bump, it feel really hard, thus I was suspected that my bone start to swell up too. I was in lot of pain, and I couldn't use my right side to eat. So the endodontist gave me a course of Clindamycin 300mg four times daily, and I took that for 10 days.

It has been two weeks since I have the root canal done. Now, I pretty much don't have any pain, except when I using that tooth to bite. My gum are still red, and I still can't use my right side to eat. I still have a very hard bum near the root underneath the gum. The endodontist doesn't want me to take anymore antibiotic, and he said something about the infection has push the peridontal something (I didn't catch the technical term), it feels hard, because I was feeling my bone. He promised me the swelling will go down, but will take longer period of time.

I am just very confused. For years, I was fine. Now I got the roof canal done, and I was in a worse sharp than before. That very swelled bump that I am feeling, is it from swelling from the bone? Bone doesn't just swelling up unless there is increasing abscess formation. I am not a dentist, but I have enough medical training to know that if you have an abscess, you have to drain it in order for it to heal. If draining is not an option, you treat with a longer course of antibiotic, 7-14 days for soft tissue infection, and minimum of 28 days for active bone infection.

Is my endodontist doesn't know what he is doing or am I overly concerned? Please help, I have lost many night of sleep over this. Thanks in advance