A 15-year-old boy with a non-contributory medical history was referred to Department of Conservative Dentistry and Endodontics of Post Graduate Institute of Dental Sciences, Rohtak, Haryana by a private practitioner. Patient reported history of trauma at the age of 5 years. He presented with a dilacerated crown in relation to the left maxillary central incisor (21), a sinus tract in the facial vestibule and tenderness to percussion with respect to left maxillary lateral incisor (22) . Periodontal probing showed an intact epithelial attachment with 3-mm mesial and distal probing, 2-mm palatal probing and 3 mm buccal probing in 21, but it revealed 9-mm probing depth in relation to buccal aspect of 22. Radiographic evaluation indicated large periapical radiolucency, open apex and a tooth like structure associated with 22 [Table /Fig-1b]. Furthermore, there was evidence of additional canals radiographically in relation to 21. The differential diagnosis of pulpal necrosis with chronic periapical abscess and radicular cyst were considered based on the facts that teeth were nonvital, pus discharge from the sinus and large periapical radiolucency present in relation to both the teeth. The management part included the endodontic root canal treatment of both the teeth.