Long term fistula - other causes ?

Hi,

I had root canal treatment around 5 years ago following the death of an
upper right 1st Bicuspid. I never received a satisfactory explanation
for the tooth 'dying' despite good hygiene. I had a crown fitted on
the remains of the tooth.

I have now developed an infection in the cheek side root canal which is
draining through 2 fistulas but is not causing any pain. My dentist has
removed the crown and root fillings and has given me antibiotics to
clear up the infection. I'm going back in a week to investigate the
possibility of re-filling the canals and re-fitting the crown.
Inspection of the root showed no fractures or obvious causes for the
infection.

I've had what I assume to be a fistula adjacent to this tooth for many
years (perhaps as long as 20). Despite repeatedly mentioning it to the
various dentists I've seen over the years, they were never able to see
any signs of trouble on x-rays. The fistula was hard to the touch and
very rarely leaked (if ever). In short, it was there but didn't cause
any discomfort.

I'm concerned that there's something else there that caused this tooth
to die in the first place and I suspect the infection will just recur
if I get the roots filled and the tooth re-crowned. How can I make
sure my dentist gets to the root (pardon the pun) of the problem
without performing an extraction?

Thanks,

David.

.

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