endodontic treatment of a large periradicular lesion: a case report

this case report describes the endodontic treatment of a large cyst-like periradicular lesion a 29-year-old female with a large chronic periapical abscess in the region of right maxillary sinus presented into private practice, accompanied with non-vital first upper molar and poorly root treated second upper molar. conservative root canal treatment was carried out for both of the involved teeth in a single appointment. post operative examination after two weeks revealed complete resolution of the sinus tract. the clinical and radiographic examination after 9 months revealed complete periapical healing. the appropriate diagnosis of periradicular lesion and the treatment of the infected root canal system allowed complete healing of these large lesions without endodontic surgery.