Three weeks later the tooth was symptomfree and the rubber dam was placed on the tooth. The filling was removed and calcium dressing in the canals was rinsed with 17% neutral EDTA followed by NaOCl. The canals were then dried with paper points avoiding overinstrumentation. A master point radiograph was taken to verify correct length for root filling with a gutta-percha point in all four canals and final adjustments were made.

---