Hi, I hope its ok to post a question here..I am wondering, I had a
root canal done last friday due to a broken filling I did not know
about that was quite deep that caused my tooth to decay. (last upper
molar right side) When  my dentist did it, he said it was slighty
infected and that he rremoved all the infection.   I was not put on
antibiotics and a temp. filling was put in.  by this past monday the
tooth was throbbing, despite the fact it had root canal therapy.  I
went back to him monday and he said it was infected and put me on
amoxicillin. I am on day 3 and the tooth is still quite painful. I
went back today for a perm.f illing put in and also the dentist
noticed the tooth right next to it was a grey color. it turned out the
nerve is dead. he was able to drill into that tooth that was only half
frozen and I did not feel anything. there is a slight "bubble" on the
xray between the two teeth. Could someone explain what a bubble is? He
told me to give the infected tooth a whole week to be pain free. ISn't
that a long time? shouldn't the antibiotics take the infection away
within the first day or two?  the pain is very annoying and
uncomfortable. If I am on antibiotics then its probalby unlikely an
abscess would form, right?  he also told me I may need another root
canal on the grey tooth.

Thanks very much.