Hello ,
According to the X ray provided , it is showing that RCT was done previously , was overextended beyond the tooth . As the tooth preparation was done beyond the level of tooth ending , so a Re RCT is required immedietly followed by proper healing should be achieved before obturation .
Next Steps
Visit your dentist to perform Re RCT . This time RCT time would be taken some longer time as it is needed to be healed.