Prevalence of periapical periodontitis and its association with previous root canal treatment and, root canal obturation length –based on CBCT

Faculty of dentistry, Isfahan (khorasgan) Branch, Islamic Azad university, Isfahan, Iran

Department of Endodontics, Faculty of Dentistry, Isfahan (Khorasgan) Branch, Isfahan, Iran

Department of oral and maxillofacial radiology, Faculty of Dentistry, Isfahan (khorasgan) Branch, Islamic Azad University, Isfahan, Iran

Department of oral and maxillofacial radiology, Faculty of Dentistry, Isfahan (khorasgan) Branch, Islamic Azad university, Isfahan, Iran