1. Department of Endodontics, Faculty of Dentistry, Kermanshah University of Medical Sciences, Kermanshah 67147, Iran
2. Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Babol University of Medical Sciences, Babol 4717647745, Iran
3. Dental Research Center, Department of Pedodontics, Faculty of Dentistry, Birjand University of Medical Sciences, Birjand 97178, Iran