Root canal was done 1 year ago but got some inflammation above that teeth
I did RCT of 2nd upper molar 1 year ago, it was going good, no pain. But recently I noticed a bump on the gum right above that teeth if I pressed, it would pain. Now little bit of history is that food used to stuck between the contact of that RCT teeth and other molar and I would pick it with finger(which did eventually caused trauma) and i had visited same dental previously and he said its Gum trauma and suggested some toothpaste(and floss as well and it went good), now, this time I went to dental today, and he just poked it with some tool(some blood flew) and said its "Tooth infection" and I need to take antibiotics and come back after 3 days to open the Crown, we will let infection settle and place back the crown.
Although my dental is very old, he has experience above 25+ years but I am not sure if what he said is right or not.
Currently that inflammation is not that much visible after he poked, little blood did release(I had no pain or anything). Currently I dont have any pain either.
I'm bit worried if he is going to do RE-RCT as its molar teeth and not sure if RE-RCT will fail eventually?
Any thoughts