About a year ago I had a root canal re-treatment performed on molar
#3. The original root canal work was done about 8 or 9 years ago. The
re-treatment involved redoing 3 root canals that were infected at the
top, and also performing a root canal on a missed 4th root on the same

Any advice and / or opinions much appreciated....thank you in advance.
Over the last 12 years or so, I have had a recurring abcess on the
root of an upper left 5 (premolar?) and have had numerous courses of
Amoxycillan. From memory, I have had the abcess about 5 or 6 times on