#9 treated 4 years previously (incomplete GP?) and DFL composite. PARL with fistula present at MCJ apical to #9. Percussion Positive. No suppuration present today. Dx- Failed RCT or Incomplete RCT--CAP (Phoenix Abscess).
Access through cotton pellet to find one canal. Strong, foul odor present, vital tissue was entombed and became necrotic.
Irrigate NaOCL, Dry, Thermaseal, 50x.012 Tulsa Rotary, 25 mm length, Warm GP, EPA, DFIL Comp. BU shade C-2.
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