Patient complains of an occasional swelling lasting a few days that fluctuates in size near the gums of the UR2. Asymptomatic, no response to thermal and electric stimuli and no mobility. X-ray shows PA lesion and internal resorption. CBCT taken to map the extent of the internal resorption and to evaluate the possible presence of a perforation. Surprisingly the tooth bled upon entry. One visit treatment. XP finisher file and sonic activation of irrigatnts used . Cut made into the BC GP 2mm from the end. GP coated in BC sealer at the tip and 2mm end. Inserted into canal and binds at the apex. GP twisted and 2mm end detaches from the rest of the cone. This created an apical seal. BS sealer tip inserted into canal close to the internal resorptive defect and injected. Rest of the GP inserted back into canal to push sealer into all the areas. Resin modified coronal seal completed.