REPs were done for 10 mature maxillary necrotic teeth with periapical lesions confirmed by digital periapical radiographs. Instrumentation was done using Protaper Next till size X3 (size 30). Pre-operative radiographs also included CBCT scans to measure the 3D volume and area of the periapical lesion to be used as baseline data. The postoperative radiographic examination included: a) digital periapical radiographs taken at 3,6,9, and 12 months to monitor the lesion through out the follow-up period. b)CBCT scan to measure quantitatively the volume and area of the periapical lesion after 12 months follow up
3D volume assessment was done to evaluate the periapical healing following REPs in mature teeth.