Mahrokh Imanimoghaddam - Professor of Oral and Maxillofacial Radiology, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Elaheh Tohidi - Oral and Maxillofacial Radiologist, Mashhad, Iran
Azam Ahmadian Yazdi - Instructor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Mashhad University, Mashhad, Iran of Medical Sciences, Mashhad, Iran
Ehsan Nikbakhsh - General dentist, Mashhad, Iran
fereshteh goudarzi - Post-graduate Student of Oral and Maxillofacial Radiology, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran

Background:Panoramic radiographs are among diagnostic tools used by dentists. Because of the relatively large area covered by panoramic radiographs, incidental findings are possible. This study aimed to evaluate the incidental findings in digital panoramic radiographs of patients referred to the Oral and Maxillofacial Radiology Department of Mashhad Dental School. Methods:In this cross-sectional study, panoramic radiographs of ۱۹۸۷ patients over one year were evaluated, and any finding that was not related to the reason of panoramic radiography request was recorded as an incidental finding. These findings were grouped into five categories: intraosseous findings, dental abnormalities, soft tissue calcifications, maxillary sinus findings, and TMJ findings. The obtained data were analyzed using descriptive statistics and through SPSS۱۸.۰. Results: A total of ۳۹۹۰ findings in ۱۹۸۷ patients, including ۷۹۵ men and ۱۱۹۲ women aged ۴ to ۸۴ years old, were identified. The overall rate of incidental findings was ۸۵%. The highest rate of incidental findings was related to intraosseous findings (۵۳.۸%), followed by dental anomalies (۳۴.۷%), soft tissue calcifications (۲۱.۲%), maxillary sinus (۱۷.۳%), and TMJ findings (۳.۲%). The most prevalent intraosseous incidental finding was rarefying osteitis. The most common dental abnormalities were impaction and missing. Half of the soft tissue calcifications were elongated calcified styloid ligament. The most common sinus and TMJ incidental findings were mucosal thickenings and articular eminence pneumatization, respectively. Conclusions:Incidental findings in panoramic radiographs are common. Although most of the findings do not require treatment, early diagnosis of some of these findings is beneficial in preventing subsequent complications in patients.

Radiography, Panoramic, Incidental findings, Jaw, Prevalence