1 Department of Oral and Maxillofacial Radiology, Dental Caries Prevention Research Centre, Qazvin University of Medical Sciences, Qazvin, Iran.
2 Department of Oral and Maxillofacial Radiology, Dental Caries Prevention Research Centre, Qazvin University of Medical Sciences, Qazvin, Iran. Electronic address: kosar.ramezani@gmail.com.