It all started with my failed filling, within a yr I started to have toothache n then pus coming out from my gum, only then I go see dentist to have a RCT done. At first  I thought after the treatment the pus will subside but eventually not.

The first picture is my lastest xray, 2nd will be my first visit.
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So from the Xray, do u have anything to advise??